화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Materials Research, Vol.16, No.12, 754-760, December, 2006
DOI10.3740/MRSK.2006.16.12.754  Export Citation
Au/TiO2 core-shell 나노입자의 합성에 있어서 Au 나노입자의 분산특성에 미치는 Mercaptoundecanoic acid (MUA)의 피복 효과
The Effect of Mercaptoundecanoic Acid (MUA) Coating on Dispersion Property of Au Nanoparticles in Synthesis of Au/TiO2 Core-shell Nanoparticles
유연태†, 김병규1
  • 전북대학교 공업기술연구센터 신소재공학부
  • 1한국지질자원연구원 자원활용소재연구부
Yeon-tae Yu†, and Byoung-Gyu Kim1
  • Division of Advance Materials Engineering, Research Center for Industrial Technology, Chonbuk National University, Jeonju, 561-756, Korea
  • 1Minerals and Materials Processing Division, Korea Institute of Geoscience and Mineral Resources, Daejeon 305-350, Korea
E-mail:
Mercaptoundecanoic acid (MUA) has been used to enhance the dispersity of Au nanoparticles in organic solvent and the affinity between the Au nanoparticles surface and titanium dioxide shell in the synthesis of core-shell composite nanoparticles. The dispersity of the MUA-coated Au nanoparticles in ethanol aqueous solution with different concentration of was investigated by UV-Vis. absorption spectrum and the coating amount of MUA was varied from 0.02 mM to 1.0 mM. The MUA-coated Au nanoparticles were highly dispersed in pure in the wide range of the coating amount of MUA. On the contrary, the MUAcoated Au nanoparticles showed an enhanced stability in the ethanol/=8/2 mixed solution only when the coating amount of MUA was 0.05 mM, and in the ethanol/=7/3 mixed solution when the coating amount of MUA was in the range from 0.02 mM to 0.17 mM. From this systematic study, it can be inferred that the stability and the dispersibility of Au nanoparticles in organic solvents are highly sensitive towards the amount of MUA coating.
Keywords:Au colloid;dispersion;ethanol;core-shell nanoparticle;mercaptoundecanoic acid
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