论文信息 - A new photo-sensing nano-device structure with CdSe and Au nanoparticles on silicon substrate

A new photo-sensing nano-device structure with CdSe and Au nanoparticles on silicon substrate

CdSe nanoparticles (NPs) have shown superior photoconductivity as the particle size is shrunk to nano-scale. This provides a potential application as a nano-photo-sensor. In this work, we choose the CdSe NPs with diameter of 25 nm, which is comparable to the electron mean free path in bulk material, to get a high mobility in NPs. By using the DNA oligonucleotides as linkers through Au-S bonds, a new photo-sensing nano-device structure is proposed with Au NPs of 60 nm in diameter and CdSe NPs on a silicon substrate, where the CMOS interface circuits are designed to read signals of the sensor.

Chung-Yu Wu | Yaw-Kuen Li | Chang-Ching Tu

[1] J. Storhoff,et al. Sequence-Dependent Stability of DNA-Modified Gold Nanoparticles , 2002 .

[2] A. P. Alivisatos,et al. Band Gap Variation of Size- and Shape-Controlled Colloidal CdSe Quantum Rods , 2001 .

[3] C. Mirkin,et al. A fluorescence-based method for determining the surface coverage and hybridization efficiency of thiol-capped oligonucleotides bound to gold thin films and nanoparticles. , 2000, Analytical chemistry.

[4] D. Feldheim,et al. Electronic and Optical Properties of Chemically Modified Metal Nanoparticles and Molecularly Bridged Nanoparticle Arrays , 2000 .

[5] Matthew C. Beard,et al. Size-Dependent Photoconductivity in CdSe Nanoparticles as Measured by Time-Resolved Terahertz Spectroscopy , 2002 .

[6] George C Schatz,et al. What controls the melting properties of DNA-linked gold nanoparticle assemblies? , 2000, Journal of the American Chemical Society.

[7] T. Lian,et al. Layer-by-Layer Assembly of CdSe Nanoparticles Based on Hydrogen Bonding , 2000 .

[8] David J. Pena,et al. Template Growth of Photoconductive Metal−CdSe−Metal Nanowires , 2002 .