Fabrication of gold nanoparticles array for optical analysis = 광학 응용을 위한 금 나노입자 어레이 제작에 관한 연구

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Gold nanoparticles have received increasing attention due to their unique properties such as localized surface plasmon resonance (LSPR), chemical stability, and biocompatibility. LSPR of gold nanoparticles is strong and sensitive to change of surrounding environment, and thus it is widely used in the form of arrayed substrate using photo reduction, assembly bias capillary assisted method and others to detect various types of chemicals. However, previous researches have problems in low reproducibility because the shape and size of nanoparticles are irregular. And the shape and size of nanoparticles give effect on optical property for nanoparticles. In this study, the shape and size controlled gold rhombic dodecahedron; truncated rhombic dodecahedron and octahedron were synthesized and applied as optical analysis to control the optical property. PDMS molds with uniform morphology were prepared in various size and large area using self-assembled polystyrene spheres and Au nanoparticles arrays were fabricated by drop casting the synthesized gold nanoparticles solution on the PDMS molds. Regular arrays of gold nanoparticles fabricated by this cheap and easy process have high reproducibility, statistical reliability and usability as equipment. Raman signals of 4-nitrobenzenthiol absorbed on fabricated gold nanoparticles array were measured to confirm optical applicability. All the gold nanoparticles arrays show strong Raman signal enhancement, and thus they are suitable for surface enhanced Raman scattering substrates. Rhombic dodecahedral gold nanoparticles display enormously strong enhancement compared to other nanoparticles. Because of the effect of decrease in surface area in the confocal area, enhancement factor decrease as the size of pattern increases.
Advisors
Park, O-Okresearcher박오옥
Description
한국과학기술원 : 생명화학공학과,
Publisher
한국과학기술원
Issue Date
2013
Identifier
566469/325007  / 020113316
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2013.8, [ v, 44 p. ]

Keywords

Au nanoparticles; 표면 증강 라만 산란; 나노입자 어레이; 콜로이드 식각; 형태 제어; 금 나노입자; Shape-control; Colloidal lithography; Nanoparticles array; Serface enhanced Raman scattering

URI
http://hdl.handle.net/10203/196242
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=566469&flag=dissertation
Appears in Collection
CBE-Theses_Master(석사논문)
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