@article { ISI:000232886800008, title = {Synthesis and analysis of ZnO and CdSe nanoparticles}, journal = {Pramana-Journal of Physics}, volume = {65}, number = {4, SI}, year = {2005}, note = {1st National Conference on Nanoscience and Technology, Pune, INDIA, MAR 07-08, 2005}, month = {OCT}, pages = {615-620}, publisher = {INDIAN ACADEMY SCIENCES}, type = {Article}, address = {C V RAMAN AVENUE, SADASHIVANAGAR, P B \#8005, BANGALORE 560 080, INDIA}, abstract = {

Zinc oxide and cadmium selenide particles in the nanometer size regime have been synthesized using chemical routes. The particles were capped using thioglycerol in case of ZnO and 2-mercaptoethanol in case of CdSe to achieve the stability and avoid the coalescence. Zinc oxide nanoparticles were doped with europium to study their optical properties. A variety of techniques like UV-Vis absorption spectroscopy, X-ray diffraction (XRD), photoluminescence (PL), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR) and transmission electron microscopy (TEM) were used to carry out structural and spectroscopic characterizations of the nanoparticles.

}, keywords = {chemical capping, Doping, Nanoparticles, photoluminescence}, issn = {0304-4289}, doi = {10.1007/BF03010449}, author = {Ashtaputre, S. S. and Deshpande, Aparna and Marathe, Sayali and Wankhede, M. E. and Chimanpure, J. and Pasricha, R. and Urban, J. and Haram, Santosh K. and Gosavi, S. W. and Kulkarni, S. K.} } @article { ISI:000258370500013, title = {New route for preparation of luminescent mercaptoethanoate capped cadmium selenide quantum dots}, journal = {Bulletin of Materials Science}, volume = {31}, number = {3}, year = {2008}, note = {National Review and Coordination Meeting on Nanoscience and Nanotechnology, Hyderabad, INDIA, 2007}, month = {JUN}, pages = {291-296}, publisher = {INDIAN ACAD SCIENCES}, address = {C V RAMAN AVENUE, SADASHIVANAGAR, P B \#8005, BANGALORE 560 080, INDIA}, abstract = {

We report a synthesis of cadmium selenide quantum dots (Q-CdSe) by refluxing a mixture of cadmium acetate, selenium powder, sodium sulfite and 2-mercaptoethanol in N,N{\textquoteright}-dimethyl formamide (DMF)/water solution. X-ray and electron diffractions suggest the formation of hexagonal phase of size quantized CdSe. Based on TEM analysis, the formation of nanoparticles with an average diameter of 3.5 +/- 0.5 nm is inferred. Their sols in DMF and dimethyl sulphoxide (DMSO) gave characteristic absorption peaks at 300 nm and 327 nm, which is attributed to the formation of high quality, size quantized CdSe particles. Extracted particles from the sol were readily redispersed in DMF and DMSO, which were diluted further with water without losing their optical and colloidal properties. FTIR spectroscopy suggested the formation of 2-mercaptoethanol thiolate on the particle surface, with free -OH groups available for linkage. Sols in DMSO and their solutions in water displayed an intense photoluminescence (PL).

}, keywords = {chalcogenides, Chemical synthesis, photoluminescence, semiconductor quantum dots}, issn = {0250-4707}, doi = {10.1007/s12034-008-0047-8}, author = {Wankhede, Manoj E. and Inamdar, Shaukatali N. and Deshpande, Aparna and Thete, Aniket R. and Pasricha, Renu and Kulkarni, Sulabha K. and Harani, Santosh K.} } @article {46366, title = {Water electrolysis with a conducting carbon cloth: subthreshold hydrogen generation and superthreshold carbon quantum dot formation}, journal = {ChemSusChem}, volume = {7}, year = {2014}, month = {MAR}, pages = {883-889}, type = {Article}, abstract = {

A conducting carbon cloth, which has an interesting turbostratic microstructure and functional groups that are distinctly different from other ordered forms of carbon, such as graphite, graphene, and carbon nanotubes, was synthesized by a simple one-step pyrolysis of cellulose fabric. This turbostratic disorder and surface chemical functionalities had interesting consequences for water splitting and hydrogen generation when such a cloth was used as an electrode in the alkaline electrolysis process. Importantly, this work also gives a new twist to carbon-assisted electrolysis. During electrolysis, the active sites in the carbon cloth allow slow oxidation of its surface to transform the surface groups from COH to COOH and so forth at a voltage as low as 0.2V in a two-electrode system, along with platinum as the cathode, instead of 1.23V (plus overpotential), which is required for platinum, steel, or even graphite anodes. The quantity of subthreshold hydrogen evolved was 24mLcm(-2)h(-1) at 1V. Interestingly, at a superthreshold potential (\>1.23V+overpotential), another remarkable phenomenon was found. At such voltages, along with the high rate and quantity of hydrogen evolution, rapid exfoliation of the tiny nanoscale (5-7nm) units of carbon quantum dots (CQDs) are found in copious amounts due to an enhanced oxidation rate. These CQDs show bright-blue fluorescence under UV light.

}, keywords = {Carbon, electrolysis, Hydrogen, photoluminescence, quantum dots}, issn = {1864-5631}, doi = {10.1002/cssc.201300827}, author = {Biswal, Mandakini and Deshpande, Aparna and Kelkar, Sarika and Ogale, Satishchandra} }