01646nas a2200169 4500008004100000020002200041245010600063210006900169260014500238520087500383100002001258700001301278700002001291700002401311700001701335856012401352 2018 eng d a978-0-7354-1634-500aPolyethyleneglycol/silver functionalized Reduced graphene oxide aerogel for environmental application0 aPolyethyleneglycolsilver functionalized Reduced graphene oxide a a2 Huntington Quadrangle, Ste 1 No1, Melville, NY 11747-4501 USAbDept Atom Energy; Board Res Nucl Sci, Dept Atom Energy; Bhabha Atom Res Ctr3 a

Polyethylene glycol (PEG)/Silver (Ag) functionalized reduced graphene oxide aerogel (RGOA) was synthesized. PEG/Ag decorated reduced graphene oxide aerogel was characterized using XRD, Raman spectroscopy, Fourier transform infrared spectroscopy (FT-IR). The surface morphology of PEG/Ag/RGOA was analyzed using scanning electron microscope. The non-covalent interaction between reduced graphene oxide layers and the interaction between PEG and Ag on RGOA were studied by FT-IR spectra. It was observed that the interaction between Ag and PEG could enhance the properties of RGOA. Methyl Orange (MO) dye degradation was observed from UV-Vis Spectra. The process was studied by monitoring the simultaneous decrease in the height of UV-Vis absorption peak of dye solution. The results show that PEG/RGOA and PEG/Ag/RGOA are an efficient catalyst for dye degradation.

1 aKumari, Vanitha1 aAsha, S.1 aAnanth, Nimrodh1 aRajan, M., A. Jothi1 aMathavan, T. uhttps://library.ncl.res.in/content/polyethyleneglycolsilver-functionalized-reduced-graphene-oxide-aerogel-environmental01581nas a2200193 4500008004100000022001300041245013500054210006900189260000900258490000900267520088300276100001301159700002001172700002001192700001801212700002001230700001701250856012001267 2018 eng d a0094243X00aTemperature dependent electron transport behavior of poly (methyl methacrylate)/silver functionalized reduced graphene oxide films0 aTemperature dependent electron transport behavior of poly methyl cAPR 0 v19423 a

Poly (methyl methacrylate) (PMMA) and silver functionalized reduced graphene oxide film were prepared and were investigated using FTIR and Raman. Electron transport behavior of these samples, at low temperature were studied. The prepared film exhibited a temperature dependent electron transport, at higher temperatures Arrhenius-like temperature dependence of resistance was observed indicating band like electron transport with a small thermal activation energy. At further lower temperatures hopping mechanism of conduction was observed due to the presence of defects. The conduction due to band-like electron transport at higher temperature is attributed to the easier excitation of charge carriers to the conduction band, whereas at lower temperatures conduction occurs through hopping mechanism due to localized states around Fermi level in the presence of defects.

1 aAsha, S.1 aAnanth, Nimrodh1 aKumari, Vanitha1 aOkram, G., S.1 aJose, Sujin, P.1 aRajan, Jothi uhttps://library.ncl.res.in/content/temperature-dependent-electron-transport-behavior-poly-methyl-methacrylatesilver02016nas a2200253 4500008004100000022001400041245019700055210006900252260000800321300001100329490000800340520110300348653001801451653001901469653001201488653000901500653002501509653001601534100001301550700002001563700002001583700003101603856012801634 2020 eng d a0921-510700aTemperature assisted reorganization of silver nanoparticles in free-standing, flexible chitosan functionalized reduced graphene oxide thick films: A potential SERS probe for folic acid sensing0 aTemperature assisted reorganization of silver nanoparticles in f cFEB a1144540 v2523 a

Chitosan and silver functionalized free standing reduced graphene oxide (rGO) films were prepared using simple soak and dry strategy. Redistribution of silver aggregates on chitosan functionalized rGO films were observed by thermally annealing these films at 450 degrees C, in an inert atmosphere. The re-organization / redistribution of silver aggregates in the rGO films were studied using in-situ Raman scattering signals. The redistribution of silver particles occurs through melting of micron sized silver aggregates during annealing. The rearrangement of the micro-sized silver aggregates to spherical silver nanoparticle on chitosan functionalized rGO film, as a result of temperature was assisted through factors such as graphene surface ripple rearrangement and the denaturation of rGO surface interacting chitosan chains. These free-standing films with redistributed silver nanoparticles showed excellent surface enhanced Raman scattering (SERS) effect with enhanced Raman signals for folic acid sensing, showcasing its potentiality to be utilized as flexible SERS based sensors.

10aFree-standing10agraphene oxide10asensing10aSERS10asilver nanoparticles10aThick-films1 aAsha, S.1 aAnanth, Nimrodh1 aJose, Sujin, P.1 aRajan, Michael, Anjello Jo uhttps://library.ncl.res.in/content/temperature-assisted-reorganization-silver-nanoparticles-free-standing-flexible-chitosan