Title :
A new photo-sensing nano-device structure with CdSe and Au nanoparticles on silicon substrate
Author :
Wu, Chung-Yu ; Li, Yaw-Kuen ; Tu, Chang-Ching
Author_Institution :
Nanoelectron. & Giga-Scale Syst. Lab., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
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.
Keywords :
CMOS image sensors; DNA; II-VI semiconductors; biosensors; bonds (chemical); cadmium compounds; electron mean free path; electron mobility; gold; nanoparticles; particle size; photochemistry; photoconductivity; 25 nm; 60 nm; Au; Au nanoparticles; Au-S bonds; CdSe; CdSe nanoparticles; DNA oligonucleotides; Si; electron mean free path; interface circuits; mobility; nano-photosensor; particle size; photoconductivity; photosensing nano-device structure; potential application; sensor; silicon substrate; Circuits; DNA; Electron mobility; Gold; Nanoparticles; Nanostructures; Photoconducting materials; Photoconductivity; Signal design; Silicon;
Conference_Titel :
Nanotechnology, 2003. IEEE-NANO 2003. 2003 Third IEEE Conference on
Print_ISBN :
0-7803-7976-4
DOI :
10.1109/NANO.2003.1231025
