Prepared in situ quantum dot / graphene composites and bio-sensing research View Homepage


Ontology type: schema:MonetaryGrant     


Grant Info

YEARS

2010-2011

FUNDING AMOUNT

120000 CNY

ABSTRACT

Using graphite oxide (prepared by the modified Hummers'method) as the starting material, a series of nanocrystals/graphene composites were achieved successfully via in-situ preparation, such as CdS/graphene, TiO2/graphene, CuS/graphene, CdCO3/graphene and etc., and further the as-prepared nanocomposites were characterized by FT-IR, UV-vis, SEM, Raman and so on. Selecting graphene-based nanocomposites as novel immobilization matrix and glucose oxidase as model enzyme, the direct electrochemistry of redox protein was investigated on the surface of the modified electrode, and the synergetic effect between the graphene and semiconductor materials was proved for the first time, base on the results above, a novel platform for glucose detection was further constructed. Based on the inhibition of organophosphorous pesticides (OPs) on the immobilized acetylcholinesterase activity, and using graphene-based nanocomposites as the immobilization platform, a sensitive sensor for rapid detection of OPs was proposed. Moreover, the electrochemiluminescent (ECL) and photoelectrochemical behavior of the graphene-based nanocomposites were investigated, which indicate that the presence of graphene in the nanocomposites could facilitate the electron transfer process, and thus enhanced the ECL intensity or photoelectrochemical respons More... »

URL

http://npd.nsfc.gov.cn/projectDetail.action?pid=21075054

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