02016nas 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<p>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.</p>
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-chitosan01665nas a2200217   4500008004100000022001400041245012900055210006900184260000900253490000700262520086800269653002301137653001801160653003601178653002201214653002101236100002001257700001901277700002501296856012601321       2023                        eng d  a1861-472800aFew-layer graphene lithiophilic and sodiophilic diffusion layer on porous stainless steel as lithium and sodium metal anodes0 aFewlayer graphene lithiophilic and sodiophilic diffusion layer o  cAPR 0 v183 a<p>
	In order to subdue the obvious problem of uneven electric field distribution on regularly used copper/aluminum current collectors for alkali metal batteries, graphene on porous stainless steel (pSS_Gr) was fabricated using the ion etching technique that is employed as an effective host for lithium and sodium metal anodes. The binder-free pSS_Gr demonstrated stable Li plating and stripping at areal current and capacity of 6 mA cm(-2) and 2.54 mAh cm(-2), respectively, for over 1000 cycles with 98% coulombic efficiency (C.E.). Also, in the case of Na metal anode, the host has shown stable performance at 4 mA cm(-2) and 1 mAh cm(-2) over 1000 cycles with similar to 100% C.E.. Further, a full cell composed of Li-plated pSS_Gr as an anode and LiFePO4 as a cathode is electrochemically tested at 50 mA g(-1) current density with stable 100 cycles.</p>
10aFew layer graphene10aFree-standing10aLi and Na metal functional host10aNa depth profiles10apost-cycling XPS1 aPatrike, Apurva1 aWasnik, Kundan1 aShelke, Manjusha, V.  uhttps://library.ncl.res.in/content/few-layer-graphene-lithiophilic-and-sodiophilic-diffusion-layer-porous-stainless-steel