PDF Publication Title:
Text from PDF Page: 003
[ VOLUME 6 I ISSUE 2 I APRIL– JUNE 2019] E ISSN 2348 –1269, PRINT ISSN 2349-5138 2.4. Preparation of CR-CdSe QDs modified electrode The paraffin wax impregnated graphite electrode (PIGE) was cleaned and surface polished to a mirror finish. The working surface area (3mm diameter) of the electrode was chemically modified by drop casting 10 μL of CR-CdSe QDs solution. The modified electrode is dried under vacuum and stored at 5o C for further studies. 3. Results and Discussion 3.1. \Spectroscopic Characterization The optical features and the structural fingerprint of the CR-CdSe QDs are studied using UV-Vis spectroscopy and Raman Spectroscopy. Figure. 1 shows the absorption spectra for (a) curcumin, (b) CdSe QDs without functionalizing curcumin, and (c) curcumin functionalized CdSe QDs. For the curcumin spectrum, in figure. 1(a) shows an absorption peak at 430 nm corresponding to the π- π* transition of the Fig.1. UV-Visible spectra of (a) curcumin, (b) CdSe QDs, (c) CR-CdSe QDs. Raman spectroscopy was recorded for the CR-CdSe QDs in order to understand the material Fig.2. Raman spectra for CR-CdSe QDs modified electrode. 310 IJRAR- International Journal of Research and Analytical Reviews Research Paper carbonyl group [ 21 ]. The optical abortion spectra for CdSe QDs without functionalizing curcumin is appeared at 270 nm is shown in figure. 1(b) [22]. For curcumin functionalized CdSe QDs, figure. 1(c) shows two absorption peak at 417 and 260 nm. A red shift in the peak corresponding coordination between carbonyl group of curcumin and CdSe QDs. characteristic such as composition, crystallinity, lattice stress, orientation of atoms, and symmetric nature. Figure. 2 corresponding to the raman spectra for CR-CdSe QDs. The spectra showing two peaks, 1LO and 2LO phonons of CdSe appeared at 257-294 cm-1 and 445-499 cm-1 respectively [23]. Most of the intense peak for the raman spectra of curcumin are appeared at 1101, 1241, 1347, 1413, 1638 cm-1. The high intense peak at 1347 cm-1 and low intense peak at 1101 cm-1 are assigned to C-C stretching and the peak appeared at 1241 cm-1 is for the C-O stretching of curcumin [24].PDF Image | Curucmin functionalized cadmium selenide quantum dots
PDF Search Title:
Curucmin functionalized cadmium selenide quantum dotsOriginal File Name Searched:
ijrar_issue_20543514.pdfDIY PDF Search: Google It | Yahoo | Bing
CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
Heat Pumps CO2 ORC Heat Pump System Platform More Info
| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |