The Preparation and Mechanism of Microscale Gold Structures on the Polymer with Different pH

doi:10.7517/j.issn.1674-0475.2011.03.203

Abstract

Abstract: We present a simple in situ synthesis method for preparing gold nanoparticles(Au NPs),in which the Au NPs self-aggregate into different microscale structures on a polyelectrolyte film(PEF) surface.In this approach,the aggregation behavior of Au NPs has been controlled by tuning the pH of the PEF,resulting in the different binding regime of the amine group.The round platelet gold structure has been observed on the surface of PEF with pH of 5.40.The size of the dendritic structure obtained on the surface of acidic PEF with pH of 0.65 is twice larger than that of the pH 5.40 PEF.In addition,the morphology of the gold structures changed into spheres when the pH changed from 5.40 to 12.77.Furthermore,the controlling mechanism of PEF has also been discussed.

Key words: gold nanoparticles, in situ synthesis, self-assembly, nanostructure, morphology optimization, pH

CLC Number:

WANG Wei-kang, ZHENG Mei-ling, ZHAO Zhen-sheng, DUAN Xuan-ming. The Preparation and Mechanism of Microscale Gold Structures on the Polymer with Different pH[J]. Imaging Science and Photochemistry, 2011, 29(3): 203-211.

References

[1] 吴世康,汪鹏飞.表面等离子共振(SPR)——一种新型化学检测方法的原理[J].影像科学与光化学,2008,26(2):157-168.Wu S K,Wang P F.Surface plasmon resonance(SPR)—the principle of a new method for chemical detection[J].Imaging Science and Photochemistry,2008,26(2):157-168.
[2] Jain P K,Huang X H,El-Sayed I H,El-Sayed M A.Noble metals on the nanoscale:optical and photothermalproperties and some applications in imaging,sensing,biology,and medicine[J].Acc.Chem.Res.,2008,41:1578-1586.
[3] Rosi N L,Mirkin C A.Nanostructures in biodiagnostics[J].Chem.Rev.,2005,105:1547-1562.
[4] 杜爱铭,任湘菱,唐芳琼,张琳,刘奉岭.基于金纳米棒-壳聚糖复合膜的葡萄糖生物传感器[J].影像科学与光化学,2008,26(4):271-279.Du A M,Ren X L,Tang F Q,Zhang L,Liu F L.Glucose biosensor based on the gold nanorod/chitosan compositefilm as immobilization matrix[J].Imaging Science and Photochemistry,2008,26(4):271-279.
[5] Hu M,Chen J Y,Li Z Y,et al.Gold nanostructures:engineering their plasmonic properties for biomedical ap-plications[J].Chem.Soc.Rev.,2006,35:1084-1094.
[6] Qu L T,Dai L M.Novel silver nanostructures from silver mirror reaction on reactive substrates[J].J.Phys.Chem.B,2005,109:13985-13990.
[7] Fang J X,Ma X N,Cai H H,et al.Nanoparticle-aggregated 3D monocrystalline gold dendritic nanostructures[J].Nanotechnol.,2006,17:5841-5845.
[8] Zhang X,Shi F,Yu X,Liu H,et al.Polyelectrolyte multilayer as matrix for electrochemical deposition of goldclusters:toward super-hydrophobic surface[J].J.Am.Chem.Soc.,2004,126:3064-3065.
[9] Zhang S Z,Ni W H,Kou X S,et al.Formation of gold and silver nanoparticle arrays and thin shells on meso-structured silica nanofibers[J].Adv.Funct.Mater.,2007,17:3258-3266.
[10] Perez-Juste J,Pastoriza-Santos I,Liz-Marzan L M,et al.Gold nanorods:synthesis,characterization and appli-cations[J].Coord.Chem.Rev.,2005,249:1870-1901.
[11] Dujardin E,Hsin L B,Wang C R C,et al.DNA-driven self-assembly of gold nanorods[J].Chem.Commun.,2001,1264-1265.
[12] Kanaras A G,Wang Z X,Bates A D,et al.Towards multistep nanostructure synthesis:Programmed enzymaticself-assembly of DNA/gold systems[J].Angew.Chem.,Int.Ed.,2003,42:191-194.
[13] Wang W K,Zheng M L,Chen W Q,et al.Microscale golden candock leaves self-aggregated on a polymer sur-face:Raman scattering enhancement and Superhydrophobicity[J].Langmuir,2011,27:3249-3253.
[14] Chia K K,Cohen R E,Rubner M F.Amine-rich polyelectrolyte multilayer nanoreactors for in situ gold nanop-article synthesis[J].Chem.Mater.,2008,20:6756-6763.
[15] Michael J R,James H J,Thomas B.Monomeric and polymeric amines as dual reductants/stabilisers for thesynthesis of gold nanocrystals:A mechanistic study[J].Eur.J.Inorg.Chem.,2006,2618-2623.
[16] El-Sayed M A.Why gold nanoparticles are more precious than pretty gold:noble metal surface plasmon reso-nance and its enhancement of the radiative and nonradiative properties of nanocrystals of different shapes[J].Chem.Soc.Rev.,2006,35:209-217.
[17] Patterson A L.The scherrer formula for x-ray particle size determination[J].Phys.Rev.,1939,56:978-982.
[18] Ostwald W Z.Studien uber die bildung und umwandlung fester korper[J].Z.Phys.Chem.,1897,22:289-330.
[19] Mieszawska A J,Zamborini F P.Gold nanorods grown directly on surfaces from microscale patterns of goldseeds[J].Chem.Mater.,2005,17:3415-3420.