DOCSLIB.ORG

Complex Polymer Brush Gradients Based on Nanolithography and Surface-Initiated Polymerization

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Complex Polymer Brush Gradients Based on Nanolithography and Surface-Initiated Polymerization See discussions, stats, and author profiles for this publication at: http://www.researchgate.net/publication/221709145 ChemInform Abstract: Complex Polymer Brush Gradients Based on Nanolithography and Surface-Initiated Polymerization ARTICLE in CHEMICAL SOCIETY REVIEWS · MARCH 2012 Impact Factor: 33.38 · DOI: 10.1039/c2cs15316e · Source: PubMed CITATIONS READS 23 89 3 AUTHORS, INCLUDING: Xiankun Lin Qiang He Harbin Institute of Technology Harbin Institute of Technology 18 PUBLICATIONS 248 CITATIONS 90 PUBLICATIONS 2,752 CITATIONS SEE PROFILE SEE PROFILE Available from: Qiang He Retrieved on: 28 October 2015 View Online / Journal Homepage / Table of Contents for this issue Chem Soc Rev Dynamic Article Links Cite this: Chem. Soc. Rev., 2012, 41, 3584–3593 www.rsc.org/csr TUTORIAL REVIEW Complex polymer brush gradients based on nanolithography and surface-initiated polymerization Xiankun Lin,a Qiang He*a and Junbai Li*b Received 25th November 2011 DOI: 10.1039/c2cs15316e Confined surface gradients consisting of polymer brushes have great potential in various applications such as microfluidic devices, sensors, and biophysical research. Among the available fabrication approaches, nanolithographies combined with self-assembled monolayers and surface- initiated polymerization have became powerful tools to engineer confined gradients or predefined complex gradients on the nanometre size. In this tutorial review, we mainly highlight the research progress of the fabrication of confined polymer brush gradients by using electron beam, laser, and probe-based nanolithographies and the physical base for these approaches. The application of these polymer brush gradients in biomedical research is also addressed. Introduction groups, and responsive behavior under external stimuli. A promising way to render solid surfaces with diverse Accessing surfaces with tailorable properties is very important for functionalities is to integrate functional macromolecules such diverse applications from daily life to advanced technologies. as self-assembled monolayers, polymer brushes, block copolymers, A lot of approaches have been employed to engineer surfaces and layer-by-layer polyelectrolyte multilayers onto various solid with a variety of surface energies, topography, patterns, functional substrates.1–3 Particularly, patterned and/or stimuli-responsive polymer brushes have attracted considerable attention from a Key Laboratory of Microsystems and Microstructures industrial and academic areas for advanced technologies such Manufacturing, Ministry of Education, Micro/Nano Technology as microfluidic devices, biological sensors, tissues engineering, Downloaded by Harbin Institute of Technology on 17 April 2012 Research Centre, Harbin Institute of Technology, Yikuangjie No. 2, 4,5 Harbin 150080, China. E-mail: [email protected]; and anti-biofouling. Published on 16 March 2012 http://pubs.rsc.org | doi:10.1039/C2CS15316E Fax: +86-451-86403605; Tel: +86-451-86403605 Additionally, surface gradients have recently become a hot b Beijing National Laboratory for Molecular Sciences, Institute of research area, especially in material sciences and biophysical Chemistry, Chinese Academy of Sciences, Zhong Guan Cun, Bei Yi Jie No. 2, Beijing 100190, China. E-mail: [email protected]; research. Gradients on surfaces mean that chemical or physical Fax: +86 10 82614087; Tel: +86 10 82614087 properties of components attached on substrates or substrates Xiankun Lin received his PhD Qiang He graduated from the degree from the State Key Inner Mongolia University and Laboratory of Supramolecular received his PhD degree in 2003 Structure and Materials, Jilin from the Institute of Chemistry, University in 2010 under the the Chinese Academy of supervision of Professor Lixin Sciences (ICCAS). He then Wu, when his research mainly joined the ICCAS as an focused on the self-assembly of assistant professor and block molecule–polyoxometalate became an associate professor composites. He currently is an in 2006. He spent four years as assistant professor in Prof. a research fellow of the Qiang He’s group at Micro/ Alexander von Humboldt Nanotechnology Research Foundation in the Max Plank Center, Harbin Institute of Institute of Colloids and Inter- Xiankun Lin Technology, China. Qiang He faces, Germany. Currently he is a full Professor at the Micro/Nanotechnology Research Center, Harbin Institute of Technology, China. His research interests include self-assembled active biomimetic systems, stimuli-responsive surface patterning for biomedical application. 3584 Chem. Soc. Rev., 2012, 41, 3584–3593 This journal is c The Royal Society of Chemistry 2012 View Online themselves gradually vary along one or more given directions. Gradients play an important role in vivo, they drive a range of biological processes from matter transport across biological membranes to the motion of proteins. Engineering gradients on surfaces could thus provide not only in vivo models for better understanding of biological processes, but also tools to mimic the biological functions. Moreover, gradients are also important characteristics or requirement of advanced materials. As a special type of surface, polymer brush gradients could provide one or more controllable parameters on a substrate, and render a powerful platform for high-throughput analysis to cut down the experimental time and deviation.6–11 Usually, the surface gradient of polymer brushes is divided into a physical gradient and chemical gradient (Fig. 1a). The physical gradient means the variations of physical properties such as topography and surface wettability. As an example for physical gradient, Zhang et al. prepared a topography gradient through applying a temperature field to uniform polystyrene (PS) brushes, due to the difference of the chain mobility under different temperatures.12 Such a topography gradient shows a gradual variation of wettability. In most cases, researchers concentrate more on the chemical gradient of polymer brushes and in particular on the gradual variations of grafting densities and/or molecular weights of polymer chains along one or more directions. They are generally prepared by employing various gradient fields on the initiator densities or polymerization processes for polymer brushes (Fig. 1a). These gradient fields include a temperature gradient,13 a concentration gradient derived from the diffusion in gas14,15 or in solution, and a gradient of the exposure time under UV light, ozone, and monomer solutions. The latter can be realized through a mobile mask,16 pulling the substrates from the reaction solutions,17 or draining the reaction solutions gradually.18,19 They provide Downloaded by Harbin Institute of Technology on 17 April 2012 simple and cheap methods for the primary control to surface Published on 16 March 2012 http://pubs.rsc.org | doi:10.1039/C2CS15316E gradients. For instance, Genzer et al. fabricated orthogonal polymer brush gradients with varied grafting densities and molecular weights in orthogonal directions and have shown the Fig. 1 (a) Possible routes for the fabrication of polymer brush tailored adhesion of cells on such gradient substrates.20,21 These gradients; (b) Atomic force microscopy (AFM) image of a typical approaches for the fabrication of surface-bound gradients patterned polymer brush gradients prepared by nanolithography have been reviewed previously.6–8,11 These gradients are enough combined with surface-initiated living polymerization. for those applications which do not need a precise boundary of polymer brush gradients. However, many other specific studies or applications require elaborate confined gradients or predefined Junbai Li is a full Professor of complex gradients on the nanometre size. Obviously, the above- Chemistry and Director of the mentioned methods cannot satisfy the request and thus, new CAS Key Lab of Colloid and approaches such as various lithographical techniques have to be Interface Science, Institute of introduced. Several lithographical techniques combined with the Chemistry, the Chinese Acad- surface-initiated living polymerization have actually been proved emy of Sciences (ICCAS). He to be powerful tools for tailorable gradient polymer brushes received his BSc and PhD (Fig. 1b). degrees from Jilin University. Regular preparation of polymer brushes uses the ‘‘grafting He then spent two years as a from’’ strategy, but two other methods, self-assembled mono- Postdoctoral fellow at the Max layers (SAMs) and surface-initiated polymerization (SIP), are Planck Institute of Colloids and also crucial in the tool box for fabricating gradient surfaces by Interfaces in Germany and later he had got a collaborative project lithographies. SAMs afford diverse advantages for the preparation for some years. His research of polymer brushes, including simple preparation, well-defined 22 Junbai Li interests involves molecular structures, and easy modification and patterning. After SAMs assembly of biomimetic systems, are modified with initiators, SIP can be performed to synthesize biointerfaces and nanostructures. polymer brushes with controllable structures and polymerization This journal is c The Royal Society of Chemistry 2012 Chem. Soc. Rev., 2012, 41, 3584–3593 3585 View Online degrees. An example of a typical SIP is surface-initiated atom surfaces.28 However, they are not suitable for the fabrication transfer radical polymerization (SI-ATRP). It has been used of gradient surfaces due to their dependence on master widely, because it can provide surface-bound polymers (including patterns. In
Load more

Recommended publications
  • Three-Dimensional Mesostructures As High-Temperature Growth Templates
    Three-dimensional mesostructures as high-temperature PNAS PLUS growth templates, electronic cellular scaffolds, and self-propelled microrobots Zheng Yana,b,1, Mengdi Hanc,d,e,1, Yan Shif,g,h,i, Adina Badeaj, Yiyuan Yangk, Ashish Kulkarnic,d, Erik Hansonl, Mikhail E. Kandelm, Xiewen Wenn, Fan Zhangf,g,h, Yiyue Luoc,d, Qing Linc,d, Hang Zhangf,g,h, Xiaogang Guof,g,h, Yuming Huangc,d, Kewang Nano, Shuai Jian, Aaron W. Orahamj, Molly B. Mevisj, Jaeman Limc,d, Xuelin Guoc,d, Mingye Gaoc,d, Woomi Ryuc,d, Ki Jun Yup, Bruno G. Nicolauj, Aaron Petronicoj, Stanislav S. Rubakhinj, Jun Loun, Pulickel M. Ajayann, Katsuyo Thorntonl, Gabriel Popescum, Daining Fangq,r, Jonathan V. Sweedlerj, Paul V. Braunc,d, Haixia Zhange, Ralph G. Nuzzoc,d,j, Yonggang Huangk,s,t, Yihui Zhangf,g,h,2, and John A. Rogersk,t,u,v,w,x,y,2 aDepartment of Chemical Engineering, University of Missouri, Columbia, MO 65211; bDepartment of Mechanical and Aerospace Engineering, University of Missouri, Columbia, MO 65211; cDepartment of Materials Science and Engineering, University of Illinois at Urbana–Champaign, Urbana, IL 61801; dFrederick Seitz Materials Research Laboratory, University of Illinois at Urbana–Champaign, Urbana, IL 61801; eNational Key Laboratory of Science and Technology on Micro/Nano Fabrication, Peking University, Beijing 100871, People’s Republic of China; fCenter for Mechanics and Materials, Tsinghua University, Beijing 100084, People’s Republic of China; gCenter for Flexible Electronics Technology, Tsinghua University, Beijing 100084, People’s Republic of
    [Show full text]
  • Additive Manufacture of Three Dimensional Nanocomposite Based Objects Through Multiphoton Fabrication
    polymers Article Additive Manufacture of Three Dimensional Nanocomposite Based Objects through Multiphoton Fabrication Yaan Liu 1, Qin Hu 1, Fan Zhang 1, Christopher Tuck 1, Derek Irvine 1, Richard Hague 1, Yinfeng He 1, Marco Simonelli 1, Graham A. Rance 2, Emily F. Smith 2 and Ricky D. Wildman 1,* 1 Faculty of Engineering, The University of Nottingham, University Park, Nottingham NG7 2RD, UK; [email protected] (Y.L.); [email protected] (Q.H.); [email protected] (F.Z.); [email protected] (C.T.); [email protected] (D.I.); [email protected] (R.H.); [email protected] (Y.H.); [email protected] (M.S.) 2 Nanoscale and Microscale Research Centre, The University of Nottingham, University Park, Nottingham NG7 2RD, UK; [email protected] (G.A.R.); [email protected] (E.F.S.) * Correspondence: [email protected]; Tel.: +44-115-8466-893 Academic Editor: Georg von Freymann Received: 25 May 2016; Accepted: 4 August 2016; Published: 1 September 2016 Abstract: Three-dimensional structures prepared from a gold-polymer composite formulation have been fabricated using multiphoton lithography. In this process, gold nanoparticles were simultaneously formed through photoreduction whilst polymerisation of two possible monomers was promoted. The monomers, trimethylopropane triacrylate (TMPTA) and pentaerythritol triacrylate (PETA) were mixed with a gold salt, but it was found that the addition of a ruthenium(II) complex enhanced both the geometrical uniformity and integrity of the polymerised/reduced material, enabling the first production of 3D gold-polymer structures by single step multiphoton lithography.
    [Show full text]
  • Near-Field Multiphoton Nanolithography Using an Apertureless Optical Probe
    Invited Paper Near-Field Multiphoton Nanolithography Using an Apertureless Optical Probe Xiaobo Yin, Nicholas Fang, Xiang Zhang* Department of Mechanical and Aerospace Engineering, University of California Los Angeles, Los Angeles CA, 90095 Ignacio B. Martini and Benjamin J. Schwartz Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, CA, 90095-1569 ABSTRACT Near-field multiphoton optical lithography is demonstrated by using ~120 fs laser pulses at 790 nm in an apertureless near-field optical microscope, which produce the lithographic features with ~ 70 nm resolution. The technique takes advantage of the field enhancement at the extremity of a metallic probe to induce nanoscale multiphoton absorption and polymerization in a commercial photoresist, SU-8. Even without optimization of the resist or laser pulses, the spatial resolution of this technique is as high as λ/10, nearly a factor of two smaller than the previous multiphoton lithography in the far field. Keywords: near field, multiphoton, lithography 1. INTRODUCTION There has been great recent excitement over the development of techniques for exceeding the diffraction limit in high-resolution optical imaging and photolithographic nanometer-scale device fabrication. In particular, there have been two different approaches to improving optical resolution below the limits dictated by diffraction. The first approach takes advantage of the nanoscale aperture of a near-field scanning optical microscope (NSOM) probe[1-3], while the second approach is based on the non-linear absorption of light by a chromophore exposed to an intense electromagnetic field [4,5]. The NSOM approach to improved spatial resolution takes advantage of the small, nanometer-sized aperture formed by a metal-coated optical fiber tip from which light can be either directed to or collected from the sample.
    [Show full text]
  • Appendix a Definitions and Symbols
    Appendix A Definitions and Symbols A.1 Symbols and Conversion Factors A absorptivity a distance aperture b net increase in number of molecules per formula unit; b = μ − 1 C constant C Euler’s constant; C = 0.577 Cp heat capacity c speed of light; c = 2.998 ×1010 cm/s cp specific heat at constant pressure [J/gK, J/molK] cv specific heat at constant volume [J/gK, J/molK] D heat diffusivity [cm2/s] transmittivity 2 Di molecular diffusion coefficient of species i [cm /s] d lateral width of laser-processed features [μm, cm] diameter E electric field [V/cm] energy [J] −2 kBT (T = 273.15 K) = 2.354 ×10 eV 1 kcal/mol =# 0.043 eV =# 5.035 ×102 K 1eV=# 1.1604 ×104 K =# 1.602 ×10−19 J 1 kcal =# 4.187 ×103 J 1cm−1 =# 1.24 ×10−4 eV =# 1.439 K 1J=# 2.39 ×10−4 kcal EF Fermi energy E activation temperature [K]; E = E/kB E ∗ normalized activation temperature; E ∗ = E /T (∞) E activation energy [eV; kcal/mol] Em activation energy for melting Ev activation energy for vaporization at Tb D. Bäuerle, Laser Processing and Chemistry, 4th ed., 739 DOI 10.1007/978-3-642-17613-5, C Springer-Verlag Berlin Heidelberg 2011 740 Appendix A Eg bandgap energy = energy distance between (lowest) conduction and (highest) valence bands E laser-pulse energy [J] e elementary charge; e = 1.602 ×10−19 C ee≈ 2.718 eV electron Volt 1eV/particle = 23.04 kcal/mol F area Faraday constant; F = 96485 C/mol f focal length [cm] Gr Grashof number G Gibbs free energy g acceleration due to gravity gT temperature discontinuity coefficient H total enthalpy [J/cm3,J/g, J/mol] reaction enthalpy H a
    [Show full text]
  • Recent Advances in Microfluidic Technology for Bioanalysis and Diagnostics
    Research Collection Review Article Recent Advances in Microfluidic Technology for Bioanalysis and Diagnostics Author(s): Berlanda, Simon F.; Breitfeld, Maximilian; Dietsche, Claudius L.; Dittrich, Petra S. Publication Date: 2021-01-12 Permanent Link: https://doi.org/10.3929/ethz-b-000468393 Originally published in: Analytical Chemistry 93(1), http://doi.org/10.1021/acs.analchem.0c04366 Rights / License: In Copyright - Non-Commercial Use Permitted This page was generated automatically upon download from the ETH Zurich Research Collection. For more information please consult the Terms of use. ETH Library This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes. pubs.acs.org/ac Review Recent Advances in Microfluidic Technology for Bioanalysis and Diagnostics Simon F. Berlanda,† Maximilian Breitfeld,† Claudius L. Dietsche,† and Petra S. Dittrich* Cite This: Anal. Chem. 2021, 93, 311−331 Read Online ACCESS Metrics & More Article Recommendations ■ CONTENTS Extracellular Vesicles (EV) 324 Identification of Pathogens and Antibiotic Materials and Fabrication 312 Susceptibility Testing 325 Materials 312 Virus Detection 326 Polymers 312 Conclusion and Outlook 326 Silicon-Glass Devices 312 Author Information 327 Alternative Materials 312 Corresponding Author 327 Fabrication 313 Authors 327 Lithography 313 Author Contributions 327 Direct Laser Writing 313 Notes 327 3D Printing 313 Biographies 327 3D Channel Fabrication 313 Acknowledgments 327 Well Plate Insert 314 References 327 Coating 314 Antifouling 314 Cell Adherence 314 fl Operational Units 314 icro uidics has become a mature technology, providing Pumping 314 M an excellent toolbox for the handling and manipulation of fluid samples, suspended cells, and particles.
    [Show full text]
  • 3D Electron-Beam Writing at Sub-15 Nm Resolution Using Spider Silk As a Resist ✉ ✉ Nan Qin1, Zhi-Gang Qian 2, Chengzhe Zhou1, Xiao-Xia Xia 2 & Tiger H
    ARTICLE https://doi.org/10.1038/s41467-021-25470-1 OPEN 3D electron-beam writing at sub-15 nm resolution using spider silk as a resist ✉ ✉ Nan Qin1, Zhi-Gang Qian 2, Chengzhe Zhou1, Xiao-Xia Xia 2 & Tiger H. Tao 1,3,4,5,6,7,8,9 Electron beam lithography (EBL) is renowned to provide fabrication resolution in the deep nanometer scale. One major limitation of current EBL techniques is their incapability of arbitrary 3d nanofabrication. Resolution, structure integrity and functionalization are among fi 1234567890():,; the most important factors. Here we report all-aqueous-based, high- delity manufacturing of functional, arbitrary 3d nanostructures at a resolution of sub-15 nm using our developed voltage-regulated 3d EBL. Creating arbitrary 3d structures of high resolution and high strength at nanoscale is enabled by genetically engineering recombinant spider silk proteins as the resist. The ability to quantitatively define structural transitions with energetic electrons at different depths within the 3d protein matrix enables polymorphic spider silk proteins to be shaped approaching the molecular level. Furthermore, genetic or mesoscopic modification of spider silk proteins provides the opportunity to embed and stabilize physiochemical and/or biological functions within as-fabricated 3d nanostructures. Our approach empowers the rapid and flexible fabrication of heterogeneously functionalized and hierarchically structured 3d nanocomponents and nanodevices, offering opportunities in biomimetics, therapeutic devices and nanoscale robotics. 1 State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, China. 2 State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China.
    [Show full text]
  • Polymer Brush Hypersurface Photolithography
    ARTICLE https://doi.org/10.1038/s41467-020-14990-x OPEN Polymer brush hypersurface photolithography Carlos Carbonell 1,2, Daniel Valles1,2,3, Alexa M. Wong1,2, Andrea S. Carlini4, Mollie A. Touve4, ✉ Joanna Korpanty4, Nathan C. Gianneschi 4,5,6 & Adam B. Braunschweig 1,2,3,7 Polymer brush patterns have a central role in established and emerging research disciplines, from microarrays and smart surfaces to tissue engineering. The properties of these patterned surfaces are dependent on monomer composition, polymer height, and brush distribution across the surface. No current lithographic method, however, is capable of adjusting each of 1234567890():,; these variables independently and with micrometer-scale resolution. Here we report a technique termed Polymer Brush Hypersurface Photolithography, which produces polymeric pixels by combining a digital micromirror device (DMD), an air-free reaction chamber, and microfluidics to independently control monomer composition and polymer height of each pixel. The printer capabilities are demonstrated by preparing patterns from combinatorial polymer and block copolymer brushes. Images from polymeric pixels are created using the light reflected from a DMD to photochemically initiate atom-transfer radical polymerization from initiators immobilized on Si/SiO2 wafers. Patterning is combined with high-throughput analysis of grafted-from polymerization kinetics, accelerating reaction discovery, and opti- mization of polymer coatings. 1 Advanced Science Research Center at the Graduate Center of the City University of New York, 85 St Nicholas Terrace, New York, NY 10031, USA. 2 Department of Chemistry, Hunter College, 695 Park Ave, New York, NY 10065, USA. 3 PhD Program in Chemistry, Graduate Center of the City University of New York, 365 5th Ave, New York, NY 10016, USA.
    [Show full text]
  • High-Precision and Innovative Additive Manufacturing Solutions Based on Photopolymerization Technology
    materials Review A New Approach to Micromachining: High-Precision and Innovative Additive Manufacturing Solutions Based on Photopolymerization Technology Paweł Fiedor 1 and Joanna Ortyl 1,2,* 1 Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland; pawel.fi[email protected] 2 Photo HiTech Ltd., Bobrzy´nskiego14, 30-348 Cracow, Poland * Correspondence: [email protected] Received: 9 June 2020; Accepted: 29 June 2020; Published: 1 July 2020 Abstract: The following article introduces technologies that build three dimensional (3D) objects by adding layer-upon-layer of material, also called additive manufacturing technologies. Furthermore, most important features supporting the conscious choice of 3D printing methods for applications in micro and nanomanufacturing are covered. The micromanufacturing method covers photopolymerization-based methods such as stereolithography (SLA), digital light processing (DLP), the liquid crystal display–DLP coupled method, two-photon polymerization (TPP), and inkjet-based methods. Functional photocurable materials, with magnetic, conductive, or specific optical applications in the 3D printing processes are also reviewed. Keywords: 3D printing; high-resolution; additive manufacturing; photopolymerization; industry 4.0; stereolithography; two-photon polymerization 1. Introduction Three dimensional (3D) printing is currently an extremely important branch of Research and Development (R&D) departments. This is because of its rapid prototyping, swift elimination of design errors, and improvements of the product at the prototyping stage. This approach significantly accelerates the implementation of new solutions without incurring significant production costs and eliminating in-production testing of underdeveloped models. Thanks to 3D printing techniques, making a prototype with complex geometry has become possible in a short time with unprecedented precision [1].
    [Show full text]
  • 65 Nm Feature Sizes Using Visible Wavelength 3-D Multiphoton Lithography
    65 nm feature sizes using visible wavelength 3-D multiphoton lithography Wojciech Haske†, Vincent W. Chen†, Joel M. Hales, Wenting Dong, Stephen Barlow, Seth R. Marder, Joseph W. Perry* † These authors contributed equally to this work School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, GA 30332-0400 [email protected] Abstract: Nanoscale features as small as 65 ± 5 nm have been formed reproducibly by using 520 nm femtosecond pulsed excitation of a 4,4'- bis(di-n-butylamino)biphenyl chromophore to initiate crosslinking in a triacrylate blend. Dosimetry studies of the photoinduced polymerization were performed on chromophores with sizable two-photon absorption cross- sections at 520 and 730 nm. These studies show that sub-diffraction limited line widths are obtained in both cases with the lines written at 520 nm being smaller. Three-dimensional multiphoton lithography at 520 nm has been used to fabricate polymeric woodpile photonic crystal structures that show stop bands in the near-infrared spectral region. ©2007 Optical Society of America OCIS codes: (220.3740) Lithography; (190.4180) Multiphoton processes; (350.3450) Laser- induced chemistry; (999.9999) Photonic bandgap materials; (999.9999) Nanofabrication References and links 1. B. H. Cumpston, S. P. Ananthavel, S. Barlow, D. L. Dyer, J. E. Ehrlich, L. L. Erskine, A. A. Heikal, S. M. Kuebler, I. Y. S. Lee, D. McCord-Maughon, J. Qin, H. Rockel, M. Rumi, X.-L. Wu, S. R. Marder, J. W. Perry, "Two-photon polymerization initiators for three-dimensional optical data storage and microfabrication," Nature 398, 51-54 (1999).
    [Show full text]
  • Fitzpatrick-Dissertation-2018
    Copyright by Mignon Denise Fitzpatrick 2018 The Dissertation Committee for Mignon Denise Fitzpatrick Certifies that this is the approved version of the following dissertation: Investigating Sociomicrobiology by Integrating Micro 3D Printing with Quantitative Analytical Techniques Committee: Jason B. Shear, Supervisor Jennifer S. Brodbelt Sean T. Roberts Eric V. Anslyn David W. Hoffman Investigating Sociomicrobiology by Integrating Micro 3D Printing with Quantitative Analytical Techniques by Mignon Denise Fitzpatrick Dissertation Presented to the Faculty of the Graduate School of the University of Texas at Austin in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy The University of Texas at Austin December 2018 Dedication I would like to dedicate this dissertation to Ann Crane, who taught me French, patience, perseverance, and is still trying to hammer self-worth into my head. She is an epic human being, and an inspiration. Acknowledgements First, I would like to thank my advisor, Dr. Jason Shear, for allowing me to complete the work necessary to earn this Ph.D. in Chemistry. Secondly, I would like to thank my committee members, Drs. Jenny Brodbelt, Sean Roberts, Eric Anslyn and David Hoffman. Thank you to all the Shear lab members past and present, who have contributed directly to my success in this endeavor. In particular, I’d like to thank Drs. Eric Ritschdorff and Jodi Connell for their guidance, and Allison Myers for all her help and friendship, without which this dissertation would not have been able to be completed. Thank you also to Dr. Janine Elliott and Olja Simoska for their help with Project Beam a Laser through the Wall, and for all of Olja’s help with setting up the new lab optical tables.
    [Show full text]
  • Methyl Methacrylate)
    Optimization of Direct-Write 3D Two Photon Photolithography in Poly (methyl methacrylate) Undergraduate Research Thesis Presented in Partial Fulfillment of the Requirements for graduation “with Honors Research Distinction in Physics” in the undergraduate colleges of The Ohio State University by Robert Patton The Ohio State University April 2015 Project Advisor: Professor Gregory Lafyatis, Department of Physics 2 Abstract Direct-write multiphoton photolithography (DWMP) is a technique which exploits the localization of multi-photon processes which occur at a tightly focused femtosecond laser to write 3D patterns in a photosensitive polymer. In conventional photolithography devices are fabricated by using masks to tailor light exposure onto photo sensitive material, developing the photoresist, and this process is driven by a single photon. DWMP differs in that the energy of at least two photons is required to reach criticality for exposure chemistry. This means that whereas traditional photolithography will polymerize a material throughout the volume of the beam, DWMP will only polymerize a material where the probability of two or more photons interacting with a molecule simultaneously is incredibly high, i.e. at the focus. This is the essential idea behind DWMP which allows arbitrary 3D shapes to be created, in contrast to traditional photolithography where devices are produced in layers with strict limitations on complexity. DWMP also allows for the creation of very small, high resolution shapes. This is possible because of the tight laser focus which produces “voxels” (volume-pixels) of polymerized material. To zeroth order the dimensions of a voxel can be estimated by a Gaussian laser’s diffraction limit. However in the DWMP case, because two or more photons must interact at the beam waist to induce polymerization the effective volume is reduced in proportion to the number of photons required for the interaction.
    [Show full text]
  • Improved System for Fabrication and Characterization of Nanophotonic Devices by Multi-Photon Lithography
    University of Central Florida STARS Electronic Theses and Dissertations, 2004-2019 2019 Improved System for Fabrication and Characterization of Nanophotonic Devices by Multi-photon Lithography Rashi Sharma University of Central Florida Part of the Chemistry Commons Find similar works at: https://stars.library.ucf.edu/etd University of Central Florida Libraries http://library.ucf.edu This Doctoral Dissertation (Open Access) is brought to you for free and open access by STARS. It has been accepted for inclusion in Electronic Theses and Dissertations, 2004-2019 by an authorized administrator of STARS. For more information, please contact [email protected]. STARS Citation Sharma, Rashi, "Improved System for Fabrication and Characterization of Nanophotonic Devices by Multi- photon Lithography" (2019). Electronic Theses and Dissertations, 2004-2019. 6619. https://stars.library.ucf.edu/etd/6619 IMPROVED SYSTEM FOR FABRICATION AND CHARACTERIZATION OF NANOPHOTONIC DEVICES BY MULTI-PHOTON LITHOGRAPHY by RASHI SHARMA BSc. Dr. Bhim Rao Ambedkar University 2004 MSc. Dayalbagh Educational Institute 2006 MS. University of Central Florida 2014 A dissertation submitted in the partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Chemistry of the College of Sciences at the University of Central Florida Orlando, Florida Fall Term 2018 Major Professor: Stephen M. Kuebler © 2018 Rashi Sharma ii ABSTRACT A new system for multi-photon lithography (MPL) was developed and used to fabricate three-dimensional (3D) structures with higher aspect ratio, better resolution, improved fidelity, and reduced structural distortion relative to a conventional implementation of MPL. A set of curved waveguides (Rbend = 19 µm, and 38 µm) and straight waveguides (length = 50 µm, Rbend = ∞) were fabricated in an epoxide photopolymer and optically characterized using light having a wavelength in vacuum of λ0 = 2.94 µm.
    [Show full text]