<P><B>Abstract</B></P> <P>In this work, we carried out a systematic study of the effects of morphology and coverage of decorated silver (Ag) nanostructures on the sensing performance of monolayer graphene. Ag nanowires (...
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https://www.riss.kr/link?id=A107465245
2018
-
SCOPUS,SCIE
학술저널
631-636(6쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P><B>Abstract</B></P> <P>In this work, we carried out a systematic study of the effects of morphology and coverage of decorated silver (Ag) nanostructures on the sensing performance of monolayer graphene. Ag nanowires (...
<P><B>Abstract</B></P> <P>In this work, we carried out a systematic study of the effects of morphology and coverage of decorated silver (Ag) nanostructures on the sensing performance of monolayer graphene. Ag nanowires (AgNWs) and Ag nanoparticles (AgNPs) were uniformly coated on the chemical vapor deposition-grown graphene. Raman spectra showed that both AgNPs and AgNWs served as n-type dopants to graphene. After decoration of the Ag nanostructures, the sensing performance of the graphene towards NO<SUB>2</SUB> gas at room temperature was significantly improved. For a graphene and AgNWs hybrid sensor, the sensitivity was approximately 2 time higher and the recovery time was ~10 times shorter than the pristine graphene. In addition, we found that the behavior of NO<SUB>2</SUB> adsorption depends on the shape of the decorated Ag nanostructures. The surface coverage ratio of the Ag nanostructures on graphene presented a contrary trend, in that lower coverage of AgNWs and higher coverage of AgNPs on graphene exhibited better sensing properties. The effect of each nanostructure on improving graphene sensing is discussed in terms of the surface energy of different facets of Ag nanostructures and the electronic properties of the hybrid structures.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Ag-nanostructures decorated on graphene serve as n-typed dopants to graphene. </LI> <LI> Sensitivity of graphene sensor to NO<SUB>2</SUB> is optimized by control of decorated Ag-nanostructures. </LI> <LI> Enhanced sensing performance of hybrid structure is due to modification of electric structures. </LI> </UL> </P>
Enhanced electrochromic properties of nanorod based WO3 thin films with inverse opal structure