title: Enhanced fluorescence of graphene oxide by well-controlled Au@SiO2 core-shell nanoparticles.
abstract: Graphene and graphene derivatives, including graphene oxide (GO) and reduced GO (rGO), have attracted remarkable attention in different fields due to their unique electronic, thermal, and mechanical properties, whereas the fluorescence property is rarely been studied. This paper reports on metal-enhanced fluorescence Au@SiO2 composite nanoparticles adsorbed graphene oxide nanosheets, where the silica-shell is used to control the distance between gold-core and fluorophore GO, and a positively charged polyelectrolyte poly(allylamine hydrochloride) (PAH) is used to adsorb the negatively charged silica-shell and GO by layer-by-layer assembly (LbL) approach. The silica-shell around the 80 nm gold-core can be well-controlled by ending the reaction at different times. Various analytical techniques were applied to characterize the morphology and optical characters of the as-prepared particles. A more than three-fold increase of the fluorescence intensity of GO was obtained.
authors.affiliation: Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China, abuangle@126.com.
authors.forename: Cuiyan
authors.initials: C
authors.lastname: Li
authors.forename: Yihua
authors.initials: Y
authors.lastname: Zhu
authors.forename: Siwen
authors.initials: S
authors.lastname: Wang
authors.forename: Xiaoqing
authors.initials: X
authors.lastname: Zhang
authors.forename: Xiaoling
authors.initials: X
authors.lastname: Yang
authors.forename: Chunzhong
authors.initials: C
authors.lastname: Li
mesh_terms: D000327:Adsorption; D005453:Fluorescence; D006046:Gold / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D011073:Polyamines / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D010087:Oxides; D011073:Polyamines; C063994:polyallylamine; D006046:Gold; D012822:Silicon Dioxide; D006108:Graphite
references.citation: Nano Res. 2008;1(3):203-212
references.pmid: 20216934
references.citation: J Am Chem Soc. 2009 Jun 17;131(23):8262-70
references.pmid: 19469566
references.citation: Science. 2008 Feb 29;319(5867):1229-32
references.pmid: 18218865
references.citation: Angew Chem Int Ed Engl. 2009;48(26):4785-7
references.pmid: 19475600
references.citation: Chem Soc Rev. 2010 Jan;39(1):228-40
references.pmid: 20023850
references.citation: J Am Chem Soc. 2008 Aug 20;130(33):10876-7
references.pmid: 18661992
references.citation: Small. 2010 Feb 22;6(4):513-6
references.pmid: 20077425
references.citation: J Am Chem Soc. 2008 May 7;130(18):5856-7
references.pmid: 18399634
references.citation: J Am Chem Soc. 2006 Apr 5;128(13):4206-7
references.pmid: 16568977
references.citation: Adv Mater. 2010 Jan 26;22(4):505-9
references.pmid: 20217743
references.citation: Chem Commun (Camb). 2011 Mar 21;47(11):3135-7
references.pmid: 21270983
references.citation: Nano Lett. 2008 Sep;8(9):2773-8
references.pmid: 18700805
references.citation: Angew Chem Int Ed Engl. 2007;46(34):6473-5
references.pmid: 17645271
references.citation: Nat Mater. 2006 Sep;5(9):683-96
references.pmid: 16946728
references.citation: Nat Mater. 2007 Mar;6(3):183-91
references.pmid: 17330084
references.citation: Adv Mater. 2010 Feb 9;22(6):734-8
references.pmid: 20217780
references.citation: Anal Chem. 2010 Jul 1;82(13):5511-7
references.pmid: 20524633
references.citation: J Am Chem Soc. 2009 Jan 28;131(3):1043-9
references.pmid: 18939796
references.citation: J Am Chem Soc. 2006 Jun 21;128(24):7756-7
references.pmid: 16771487
references.citation: Nat Nanotechnol. 2008 Feb;3(2):101-5
references.pmid: 18654470