Nanotechnology - Fundamentals and Applications 1
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Meso/Micro/Nano Scale Technologies
Meso/Micro/Nano Scale Technologies Clayton Teague, Chief, APTD, MEL John Evans, Chief, ISD, MEL June 8, 1999 Contents of Presentation • What we (MEL) have done in meso-scale area • What is nanotechnology • Nanotechnology is important • Principal message • Why is it important to industry and NIST? – Examples of industry/NIST work at all scales • Challenges for NIST • Long term needs at the nano-scale • Short term needs at the meso/micro-scales • Priorities • Ideas • Discussion topics Background • During past 9 months, MEL has explored measurements and standards needs of meso and micro-scale manufacturing • Visited 20 companies • Conducted and participated in three workshops jointly sponsored with DARPA and NSF • Organized informal NIST-wide co-ordinating group for meso/micro/nano scale activities • All feedback from these efforts points toward an exploding growth of nanotechnology • We see a continuum of needs for NIST efforts from the macro-scale to the nano-scale What is Nanotechnology? • Technology on the scale of atoms -100 pm- up to biomolecular systems as large as cells - 10’s mm • “Top-down” - achieving increased miniaturization through extension of existing microfabrication schemes • “Bottom-up” - capability to construct functional components, devices, and systems from building blocks of atoms and molecules Nanotechnology Strategies Nanotechnology is important! • “We’ve got to learn how to build machines, materials, and devices with the ultimate finesse that life has always used: atom by atom, on the same nanometer scale as the machinery in living cells.” Richard Smalley, Nobel Laureate, 1995 • “I believe nanoscience and nanotechnology will be central to the next epoch of the information age …” John Armstrong, formerly Chief Scientist of IBM, 1991 • “If I were asked for an area of science and engineering that will most likely produce the breakthroughs of tomorrow, I would point to nanoscale science and engineering.” Neal Lane, Director OSTP, 1998 • “Nanotechnology has given us the tools to make contact with the world of the molecule and the atom. -
Investigation Into the Re-Arrangement of Copper Foams Pre- and Post-CO2 Electrocatalysis
Article Investigation into the Re-Arrangement of Copper Foams Pre- and Post-CO2 Electrocatalysis Jennifer A. Rudd 1 , Sandra Hernandez-Aldave 1 , Ewa Kazimierska 1, Louise B. Hamdy 1 , Odin J. E. Bain 1, Andrew R. Barron 1,2,3,4 and Enrico Andreoli 1,* 1 Energy Safety Research Institute, Swansea University, Bay Campus, Swansea SA1 8EN, UK; [email protected] (J.A.R.); [email protected] (S.H.-A.); [email protected] (E.K.); [email protected] (L.B.H.); [email protected] (O.J.E.B.); [email protected] (A.R.B.) 2 Department of Chemistry, Rice University, Houston, TX 77007, USA 3 Department of Materials Science and Nanoengineering, Rice University, Houston, TX 77007, USA 4 Faculty of Engineering, Universiti Teknologi Brunei, Jalan Tungku Link, Gadong BE1410, Brunei * Correspondence: [email protected] Abstract: The utilization of carbon dioxide is a major incentive for the growing field of carbon capture. Carbon dioxide could be an abundant building block to generate higher-value chemical products. Herein, we fabricated a porous copper electrode capable of catalyzing the reduction of carbon dioxide into higher-value products, such as ethylene, ethanol and propanol. We investigated the formation of the foams under different conditions, not only analyzing their morphological and Citation: Rudd, J.A.; crystal structure, but also documenting their performance as a catalyst. In particular, we studied Hernandez-Aldave, S.; Kazimierska, the response of the foams to CO2 electrolysis, including the effect of urea as a potential additive to E.; Hamdy, L.B.; Bain, O.J.E.; Barron, enhance CO catalysis. -
Photoionization of the Cerium Isonuclear Sequence and Cerium Endohedral Fullerene
University of Nevada, Reno Photoionization of the Cerium Isonuclear Sequence and Cerium Endohedral Fullerene A dissertation submitted in partial ful¯llment of the requirements for the degree of Doctor of Philosophy in Physics by Mustapha Habibi Prof. Ronald A. Phaneuf/Dissertation Advisor May, 2009 THE GRADUATE SCHOOL We recommend that the dissertation prepared under our supervision by MUSTAPHA HABIBI entitled Photoionization Of The Cerium Isonuclear Sequence And Cerium Endohedral Fullerene be accepted in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY Ronald A. Phaneuf, Ph. D., Advisor Jeffrey S. Thompson, Ph. D., Committee Member Peter Winkler, Ph. D., Committee Member Paul Neill, Ph. D., Committee Member Mohammed S. Fadali, Ph. D., Graduate School Representative Marsha H. Read, Ph. D., Associate Dean, Graduate School May, 2009 To the souls of my mother and my father, to my beloved wife and daughters, to all my family, friends and colleagues for their love and unconditional support. i Abstract This dissertation presents an experimental photoionization study of the cerium isonuclear sequence ions in the energy range of the 4d inner-shell giant resonance. In addition, single and double photoionization and photofragmentation cross sections of the cerium endohe- + dral ion Ce@C82 were also measured and studied in the 4d excitation-ionization energy range of cerium. Relative and absolute cross-section measurements were performed at un- dulator beamline 10.0.1 of the Advanced Light Source (ALS) for nine parent cerium ions: Ce+ { Ce9+. Double-to-single ionization cross-section ratios were measured for photoion- + + ization of the endohedral Ce@C82 and empty fullerene C82 molecular ions. -
Nanoscience and Nanotechnologies: Opportunities and Uncertainties
ISBN 0 85403 604 0 © The Royal Society 2004 Apart from any fair dealing for the purposes of research or private study, or criticism or review, as permitted under the UK Copyright, Designs and Patents Act (1998), no part of this publication may be reproduced, stored or transmitted in any form or by any means, without the prior permission in writing of the publisher, or, in the case of reprographic reproduction, in accordance with the terms of licences issued by the Copyright Licensing Agency in the UK, or in accordance with the terms of licenses issued by the appropriate reproduction rights organization outside the UK. Enquiries concerning reproduction outside the terms stated here should be sent to: Science Policy Section The Royal Society 6–9 Carlton House Terrace London SW1Y 5AG email [email protected] Typeset in Frutiger by the Royal Society Proof reading and production management by the Clyvedon Press, Cardiff, UK Printed by Latimer Trend Ltd, Plymouth, UK ii | July 2004 | Nanoscience and nanotechnologies The Royal Society & The Royal Academy of Engineering Nanoscience and nanotechnologies: opportunities and uncertainties Contents page Summary vii 1 Introduction 1 1.1 Hopes and concerns about nanoscience and nanotechnologies 1 1.2 Terms of reference and conduct of the study 2 1.3 Report overview 2 1.4 Next steps 3 2 What are nanoscience and nanotechnologies? 5 3 Science and applications 7 3.1 Introduction 7 3.2 Nanomaterials 7 3.2.1 Introduction to nanomaterials 7 3.2.2 Nanoscience in this area 8 3.2.3 Applications 10 3.3 Nanometrology -
Nanotechnology and Picotechnology to Increase Tissue Growth: a Summary of in Vivo Studies
Nanotechnology and picotechnology to increase tissue growth: a summary of in vivo studies Ece Alpaslan1 and Thomas J Webster1,2 Author information ► Copyright and License information ► Go to: Abstract The aim of tissue engineering is to develop functional substitutes for damaged tissues or malfunctioning organs. Since only nanomaterials can mimic the surface properties (ie, roughness) of natural tissues and have tunable properties (such as mechanical, magnetic, electrical, optical, and other properties), they are good candidates for increasing tissue growth, minimizing inflammation, and inhibiting infection. Recently, the use of nanomaterials in various tissue engineering applications has demonstrated improved tissue growth compared to what has been achieved until today with our conventional micron structured materials. This short report paper will summarize some of the more relevant advancements nanomaterials have made in regenerative medicine, specifically improving bone and bladder tissue growth. Moreover, this short report paper will also address the continued potential risks and toxicity concerns, which need to be accurately addressed by the use of nanomaterials. Lastly, this paper will emphasize a new field, picotechnology, in which researchers are altering electron distributions around atoms to promote surface energy to achieve similar increased tissue growth, decreased inflammation, and inhibited infection without potential nanomaterial toxicity concerns. Keywords: nanomaterials, tissue engineering, toxicity Go to: Introduction Bone tissue and other organ dysfunction can be provoked by poor eating habits, stress, age-related diseases such as osteoarthritis or osteoporosis, as well as accidents.1 To date, common procedures to restore or enhance life expectancy involve medical device insertion or organ transplantation.1 However, due to the low number of donors and its high cost, organ transplantation is limited. -
Synthesis and Characterization of Non-IPR Monometallic Actinide
Article Cite This: J. Am. Chem. Soc. XXXX, XXX, XXX−XXX pubs.acs.org/JACS Synthesis and Characterization of Non-Isolated-Pentagon-Rule C ‑ Actinide Endohedral Metallofullerenes U@ 1(17418) C76, C ‑ C ‑ U@ 1(28324) C80, and Th@ 1(28324) C80: Low-Symmetry Cage Selection Directed by a Tetravalent Ion † § ⊥ ‡ ⊥ † ⊥ † ∥ † Wenting Cai, , , Laura Abella, , Jiaxin Zhuang, , Xingxing Zhang, Lai Feng, Yaofeng Wang, ‡ § # § Roser Morales-Martínez, Ronda Esper, Mauro Boero, Alejandro Metta-Magaña, ‡ ‡ § † Antonio Rodríguez-Fortea, Josep M. Poblet,*, Luis Echegoyen,*, and Ning Chen*, † Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, PR China ‡ Departament de Química Física i Inorganica,̀ Universitat Rovira i Virgili, c/Marcel·lí Domingo 1, 43007 Tarragona, Spain § Department of Chemistry, University of Texas at El Paso, 500 W University Avenue, El Paso, Texas 79968, United States # University of Strasbourg, CNRS, Institut de Physique et Chimie des Materiaux́ de Strasbourg UMR 7504, 23 rue du Loess, F-67034 Strasbourg, France ∥ Soochow Institute for Energy and Materials InnovationS (SIEMIS), College of Physics, Optoelectronics and Energy & Collaborative, Soochow University, Suzhou, Jiangsu 215006, PR China *S Supporting Information ABSTRACT: For the first time, actinide endohedral metal- lofullerenes (EMFs) with non-isolated-pentagon-rule (non-IPR) carbon cages, U@C80,Th@C80,andU@C76, have been successfully synthesized and fully characterized by mass spectrometry, single crystal X-ray diffractometry, UV−vis−NIR and Raman spectroscopy, and cyclic voltammetry. Crystallo- graphic analysis revealed that the U@C80 and Th@C80 share the same non-IPR cage of C1(28324)-C80, and U@C76 was assigned to non-IPR U@C1(17418)-C76. -
Introducing Nanoengineering and Nanotechnology to the First Year Students Through an Interactive Seminar Course
Introducing nanoengineering and nanotechnology to the first year students through an interactive seminar course Hassan Raza1, Tehseen Z. Raza2 1 Department of Electrical and Computer Engineering, University of Iowa, Iowa City, Iowa 52242, USA [email protected] 2 Department of Physics and Astronomy, University of Iowa, Iowa City, Iowa 52242, USA [email protected] Abstract: We report a first year seminar course on nanoengineering, which provides a unique opportunity to get exposed to the bottom-up approach and novel nanotechnology applications in an informal small class setting early in the undergraduate engineering education. Our objective is not only to introduce the fundamentals and applications of nanoengineering but also the issues related to ethics, environmental and societal impact of nanotechnology used in engineering. To make the course more interactive, laboratory tours for microfabrication facility, microscopy facility, and nanoscale laboratory at the University of Iowa are included, which inculcate the practical feel of the technology. The course also involves active student participation through weekly student presentations, highlighting topics of interest to this field, with the incentive of “nano is everywhere!” Final term papers submitted by the students involve a rigorous technology analysis through various perspectives. Furthermore, a student based peer review process is developed which helps them to improve technical writing skills, as well as address the ethical issues of academic honesty while reviewing and getting introduced to a new aspect of the area presented by their colleagues. Based on the chosen paper topics and student ratings, the student seemed motivated to learn about the novel area introduced to them through theoretical, computational and experimental aspects of the bottom-up approach. -
Recent Advances in Electrochemical Biosensors Based on Fullerene-C60 Nano-Structured Platforms
Biosensors 2015, 5, 712-735; doi:10.3390/bios5040712 OPEN ACCESS biosensors ISSN 2079-6374 www.mdpi.com/journal/biosensors/ Review Recent Advances in Electrochemical Biosensors Based on Fullerene-C60 Nano-Structured Platforms Sanaz Pilehvar * and Karolien De Wael AXES Research Group, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium; E-Mail: [email protected] * Author to whom correspondence should be addressed; E-Mail: [email protected]; Tel.: +32-3265-3338. Academic Editors: Prabir Patra and Ashish Aphale Received: 9 September 2015 / Accepted: 14 October 2015 / Published: 23 November 2015 Abstract: Nanotechnology is becoming increasingly important in the field of (bio)sensors. The performance and sensitivity of biosensors is greatly improved with the integration of nanomaterials into their construction. Since its first discovery, fullerene-C60 has been the object of extensive research. Its unique and favorable characteristics of easy chemical modification, conductivity, and electrochemical properties has led to its tremendous use in (bio)sensor applications. This paper provides a concise review of advances in fullerene-C60 research and its use as a nanomaterial for the development of biosensors. We examine the research work reported in the literature on the synthesis, functionalization, approaches to nanostructuring electrodes with fullerene, and outline some of the exciting applications in the field of (bio)sensing. Keywords: nanotechnology; nanostructures; nano-bio hybrids; fullerene-biomolecule; biosensors 1. Introduction Bio-nanotechnology is a new emerging field of nanotechnology and combines knowledge from engineering, physics, and molecular engineering with biology, chemistry, and biotechnology aimed at the development of novel devices, such as biosensors, nanomedicines, and bio-photonics [1]. -
Structure of Endohedral Fullerene Eu@C74 W
View Online / Journal Homepage / Table of Contents for this issue PAPER www.rsc.org/pccp | Physical Chemistry Chemical Physics Structure of endohedral fullerene Eu@C74w Dmitrij Rappoport* and Filipp Furche Received 2nd February 2009, Accepted 12th May 2009 First published as an Advance Article on the web 10th June 2009 DOI: 10.1039/b902098e Structure determination of endohedral fullerenes in the absence of X-ray data is difficult and often controversial. Here we show that the structure of endohedral fullerene Eu@C74 may be determined by density functional theory aided interpretation of its electronic, infrared and Raman spectra. The use of recently developed analytical polarizability gradient methods to simulate resonance-enhanced Raman spectra is crucial for this approach and allows for a nearly complete assignment of the experimental spectra. Eu@C74 is assigned a pear-shaped C2v symmetric structure and shows strong ionic interaction between the encapsulated metal and the fullerene p system. 1. Introduction spectrum of Eu@C74 to predictions from time-dependent density functional theory (TDDFT) to identify the frontier Endohedral metallofullerenes constitute a large class of molecular orbitals, specifically the electronic configuration of fullerene inner complexes with metal atoms or small metal europium. The structure of the carbon cage is inferred from an clusters.1,2 Group 2 and 3 metals and lanthanides form a assignment of infrared and Raman spectra of Eu@C74. number of endohedral fullerene complexes notable for their An important tool in the structure elucidation of endohedral electronic absorption in the near infrared and for their large fullerenes is 13C nuclear magnetic resonance (NMR) spectro- 1–3 third-order nonlinear susceptibilities. -
From Quantum Mechanics to Nanoparticles and Their Applications
Part 2 Learning Station XIa: From quantum mechanics to nanoparticles and their applications Quantum Spin-Off 2 LEARNING STATION XIa: FROM QUANTUM MECHANICS TO NANOPARTICLES AND THEIR APPLICATIONS Introduction ..................................................................................................................................................... 3 1. Elementary particles in nanotechnology ...................................................................................................... 3 2. Size matters .................................................................................................................................................. 4 3. Can we observe this phenomenon in a real-life experiment? ....................................................................... 4 3.a Emission spectrum of single atoms............................................................................................................... 4 3.b How can we observe the emission spectrum? ............................................................................................. 5 3.c Step-by-step instructions to make your own spectrometer ......................................................................... 5 3.d What can we observe and investigate with our spectrometer?................................................................... 9 3.e How does fluorescence spectrometry work? ............................................................................................... 9 4. Quantum dots ............................................................................................................................................. -
Crystalline C60 Fulleride with Metal Inside
Crystalline C60 fulleride with metal inside Ayano Nakagawa1, Makiko Nishino1, Hiroyuki Niwa1, Katsuma Ishino1, Zhiyong Wang1, Haruka Omachi1, Ko Furukawa2, Takahisa Yamaguchi3, Tatsuhisa Kato3, Shunji Bandow4, Jeremy Rio5, Chris Ewels5, Shinobu Aoyagi6 & Hisanori Shinohara1* 1Department of Chemistry and Institute for Advanced Research, Nagoya University, Nagoya 464-8602, Japan. 2Center for Coordination of Research Facilities, Institute for Research Promotion, Niigata University, Niigata 950-2181, Japan. 3Graduate School of Human and Environmental Sciences, Kyoto University, Sakyo-ku, Kyoto 606- 8501, Japan. 4Faculty of Science and Technology, Department of Applied Chemistry, Meijo University, Nagoya 468-8502, Japan. 5Institut des Materiaux Jean Rouxel (IMN), Université de Nantes, CNRS UMR6502, BP3229, 44322 Nantes, France 6Department of Information and Basic Science, Nagoya City University, Nagoya 467-8501, Japan. Endohedral metallofullerenes have been extensively studied, since the first experimental observation of La@C60 in a laser-vaporized supersonic beam in 1985. However, all of these studies have been carried out on metallofullerenes larger than C60 such as (metal)@C82, and there + - are no reported purified C60-based metallofullerenes except for [Li@C60] (SbCl6) salt. Pure (metal)@C60 has not been obtained because of their extremely high chemical reactivity. We report here the first isolation, structural determination and electromagnetic properties of crystalline C60- based metallofullerenes, Gd@C60(CF3)5 and La@C60(CF3)5. Synchrotron X-ray single-crystal diffraction reveals that La and Gd atoms are indeed encapsulated in the Ih-C60 fullerene. The HOMO-LUMO gaps of Gd@C60 and La@C60 are significantly widened by an order of magnitude with addition of CF3- groups. Magnetic measurements show the presense of a weak antiferromagnetic coupling in Gd@C60(CF3)3 crystals at low temperatures. -
Endohedral Fullerenes: the Importance of Electronic, Size and Shape Complementarity Between the Carbon Cages and the Corresponding Encapsulated Clusters† Maira R
Research Article Received: 6 September 2013, Revised: 24 September 2013, Accepted: 6 October 2013, Published online in Wiley Online Library: 9 January 2014 (wileyonlinelibrary.com) DOI: 10.1002/poc.3245 Endohedral fullerenes: the importance of electronic, size and shape complementarity between the carbon cages and the corresponding encapsulated clusters† Maira R. Ceróna, Fang-Fang Lia and Luis A. Echegoyena* Cage-cluster complementarity is of crucial importance in determining the sizes and structures, as well as the properties of endohedral fullerenes. The encapsulated atoms or clusters, which are typically in a positively charged state, are irreversibly, mechanically, and electrostatically trapped inside the typically negatively charged cages. These rather exotic compounds exhibit exquisitely complementary properties between their components. Here, we present a short overview to show that size and shape are crucial in determining the specific structures that are formed, and the presence of electrostatic interactions result in structural motifs that are never observed for pristine fullerene cages. Copyright © 2014 John Wiley & Sons, Ltd. Keywords: electronic properties; endohedral fullerenes; fullerene and cluster cage sizes; fullerene and cluster shapes INTRODUCTION understand the most important factors involved in determining the specific structures that are observed and their relative importance. The discovery and increased interest and to some degree, fascina- tion of trapping and studying atoms and clusters inside the carbon cages