SUPPLEMENTARY INFORMATIONSUPPLEMENTARY INFORMATION . Electrophoretically deposited CdS quantum dots based electrode for biosensor application . Hemant Dhyani. a, Md. Azahar Ali
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SUPPLEMENTARY INFORMATION
Electrophoretically deposited CdS quantum dots based electrode for biosensor application
Hemant Dhyania, Md. Azahar Alib, M. K. Pandeyb, B. D. Malhotrab,c and P.Sena
aSchool of Physical Sciences, Jawaharlal Nehru University, New Delhi-110067, India. Email: [email protected]; Tel: +911126738773 bDepartment of Science and Technology Centre on Biomolecular Electronics, National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi-110012, India c
Department of Biotechnology,Delhi Technological University,Shabad Daulatpur, Main
Bawana Road, Delhi 11042, India
Fig.S1- Fluorescence of TGA capped CdS quantum dots.
Fig.S2- TEM images of dispersed and deposited CdS.
Fig. S3- Zeta potential plot of Methanol dispersed quantum dots.
Fig S1- Fluorescence spectra of TGA capped CdS QDs when excited at the wavelength λext.=360 nm.
Fig.S2- (a) Elliptical granular structures seen in the TEM image of TGA capped CdS quantum dots dispersed in methanol (b) Granular structure obtained for the same CdS QDs dispersed in methanol (c) Lattice planes of the quantum dots are visible inside the boundaries of granular structures for TGA capped CdS QDs (d) Specific area diffraction pattern (SAED)
obtained by focussing on granular structures (e) Hexagonal lattice diffraction pattern seen in SAED image of the TGA capped CdS QDs dispersed in methanol.
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Zeta potential (mV)
Fig. S3- Zeta potential plot of the methanol dispersed TGA capped CdS quantum dots, shows the average surface charge around +15 mV.