Research on Variety of Metal Microstructures Reduced by Assembled Quantum Dots†

doi:10.7503/cjcu20130532

Abstract

Abstract:

CdTe quantum dots(QDs) were assembled through femtosecond laser direct writing. Then metal ions were reduced by the CdTe QDs to make metal structures. The assembled CdTe QDs retains the fluorescent property and after the reduction it can obtain the metal properties. With this method we can prepare various of metals microstructure such as Ag, Cu, Zn, Pt, Cr, Fe, etc. The conductivity of the Cu microstructure could reach 2.7×10⁵ S/m.

Key words: CdTe quantum dot, Assemble, Reduction, Metal microstructure

CLC Number:

O614

TrendMD:

ZHANG Ran, LÜ Chao, XIAO Xinze, LUO Yang, XU Ying. Research on Variety of Metal Microstructures Reduced by Assembled Quantum Dots^†[J]. Chem. J. Chinese Universities, 2014, 35(3): 471.

Figures/Tables 7

Fig.1 Schematic illustration for femtosecond laser direct writing induced assembly CdTe QDs

Fig.2 Absorption and luminescence spectra of CdTe QDs

Fig.3 Micropattern of QDs with the thinnest line width of 175 nm

Fig.4 Element line scan on the CdTe QDs micropattern of Ag(A), Cu(B), Zn(C), Pt(D), Cr(E) and Fe(F) after immergence in metal salt solution The horizontal axis shows the scanning dots on the selected line.

Fig.5 Optical(A) and luminescene microscopic image(B) of CdTe QDs, optical microscopic image of the CdTe line(top) luminescence image before(middle) and after(bottom) immergence in CuSO4 solution(C)

Fig.6 I-V curves of CdTe QDs with Cu between the Au electrodesInset is the I-V curve of the CdTe QDs. a. Prisitine. Time/min: b. 1; c. 2; d. 3; e. 4; f. 30.

Fig.7 XPS of the CdTe QDs before(a) and after(b) immergence in CuSO4 solution (A) Cd; (B) Te.

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