@article { ISI:000380241600129,
	title = {Gold incorporated mesoporous silica thin film model surface as a robust SERS and catalytically active substrate},
	journal = {Molecules},
	volume = {21},
	number = {5},
	year = {2016},
	month = {MAY},
	pages = {667},
	publisher = {MDPI AG},
	address = {ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND},
	abstract = {<p>Ultra-small gold nanoparticles incorporated in mesoporous silica thin films with accessible pore channels perpendicular to the substrate are prepared by a modified sol-gel method. The simple and easy spin coating technique is applied here to make homogeneous thin films. The surface characterization using FESEM shows crack-free films with a perpendicular pore arrangement. The applicability of these thin films as catalysts as well as a robust SERS active substrate for model catalysis study is tested. Compared to bare silica film our gold incorporated silica, GSM-23F gave an enhancement factor of 10(3) for RhB with a laser source 633 nm. The reduction reaction of p-nitrophenol with sodium borohydride from our thin films shows a decrease in peak intensity corresponding to -NO2 group as time proceeds, confirming the catalytic activity. Such model surfaces can potentially bridge the material gap between a real catalytic system and surface science studies.</p>},
	keywords = {gold nanoparticles, model catalysis, SERS, Thin films},
	issn = {1420-3049},
	doi = {10.3390/molecules21050667},
	author = {Sekhar, Anandakumari Chandrasekharan Sunil and Vinod, Chathakudath Prabhakaran}
}
@article {46980,
	title = {Temperature assisted reorganization of silver nanoparticles in free-standing, flexible chitosan functionalized reduced graphene oxide thick films: A potential SERS probe for folic acid sensing},
	journal = {Materials Science and Engineering B-Advanced Functional Solid-State Materials},
	volume = {252},
	year = {2020},
	month = {FEB},
	pages = {114454},
	type = {Article},
	abstract = {<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>
},
	keywords = {Free-standing, graphene oxide, sensing, SERS, silver nanoparticles, Thick-films},
	issn = {0921-5107},
	doi = {10.1016/j.mseb.2019.114454},
	author = {Asha, S. and Ananth, A. Nimrodh and Jose, Sujin P. and Rajan, Michael Anjello Jothi}
}
