<p> Electronic supplementary material</p><p>Direct Electrochemistry of Hemoglobin Immobilized on CdS:Mn Nanoparticles Zhong-Qin Pana,b, Hong Fanb,c, Chuan-Guo Shib,d, Ning Baob,c, Chun-Mei Yub,c, Hai-Ying Gua,b,c aInstitute of Nautical Medicine, Nantong University, Nantong 226001, PR China bInstitute of Analytical Chemistry for Life Science, Nantong University, Nantong 226019, PR China cSchool of Public Health, Nantong University, Nantong 226019, PR China dCollege of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, PR China  To whom correspondence should be addressed. Tel/fax: +86 513 8501 2916. E-mail: [email protected]; [email protected] (H.-Y. Gu).</p><p>Energy (keV) Fig. S1. EDS spectrum of CdS:Mn NPs capped with citrate.</p>