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Received June 28, 2012
Accepted July 28, 2012
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CdTe 나노입자의 자기조립과정을 통한 나노리본 합성
Conversion of CdTe Nanoparticles into Nanoribbons via Self-Assembly
한국교통대학교 화공생물공학과, 380-702 충북 충주시 대학로 50 1한국교통대학교 컴퓨터공학과, 380-702 충북 충주시 대학로 50 2한국과학기술원 생명화학공학과, 대전광역시 유성구 구성동 373-1
Department of Chemical and Biological Engineering, Korea National University of Transportation, 50 Daehak-ro, Chungju-si, Chungbuk 380-702, Korea 1Department of Computer Engineering, Korea National University Of Transportation, 50 Daehak-ro, Chungju-si, Chungbuk 380-702, Korea 2Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Korea
kks1114@ut.ac.kr, kks1114@ut.ac.kr
Korean Chemical Engineering Research, December 2012, 50(6), 1082-1085(4), 10.9713/kcer.2012.50.6.1082 Epub 29 November 2012
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Abstract
CdTe 나노입자로부터 형성된 나노리본은 독특한 광학적 특성을 나타낸다. 용액 내 CdTe의 Te2- 이온의 산화는 나노입자에 불규칙적인 결함을 유발하며 이때 여러 층의 나노결정으로 구성된 나노리본을 형성하게 된다. 본 연구에서는 자기조립 된 CdTe 나노입자가 나노리본을 형성하는 과정에서 빛을 조사하였다. 빛은 용액 내 CdTe 나노입자의 표면에 위치한 Te2-의 산화를 촉진시키는 촉매 역할을 수행한다. 합성된 3차원 나노리본의 형태와 특성을 투과전자현미경(TEM)으로 조사하였다. TEM 결과 안정제가 완전히 제거된 부분에서 부분적으로 접힌 꼬인 형태의 다결정 나노리본을 관찰할 수 있었다. Photoluminescence (PL) 측정 결과 550 nm에서 544 nm로 나노입자가 나노리본으로 형성될 때 Blue shift 되었음을 확인하였다. 본 연구에서 제안된 새로운 합성법은 나노물질을 합성하는 새로운 대안을 제시한다.
CdTe nanoribbons feature their unique optical properties compared with CdTe nanoparticles. Slow oxidation of tellurium ions on CdTe nanoparticles resulted in the organization of individual nanoparticle into nanoribbons. The light-controlled self-assembly of CdTe nanoparticles led to twisted ribbons. It was found that irradiation improved the oxidation of tellurium ions. Transmission electron microscopy (TEM) were performed to characterize the synthesized_x000D_
nanostructures and showed nanowires were twisted after self-assembly. The photoluminescence was slightly blueshifted from 550 to 544 nm. This synthetic procedure could potentially provide a key step toward the fabrication of nanowires.
Keywords
References
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