Title :
Nanoscale biosensor chip
Author :
Koppa, Santosh ; Joo, Youngjoong ; Venkataramasubramani, Meenakshi ; Tang, Liang
Author_Institution :
Dept. of Electr. & Comput. Eng., UTSA, San Antonio, TX, USA
Abstract :
In this report, we demonstrate a nanoscale biosensor required for in field and fast detection. This sensor utilizes the Surface Plasmon Resonance (SPR) property of the gold nanorods of aspect ratio 5 to amplify the bio detection whose response is captured by three different photodiodes fabricated by the TSMC 0.18μm. Pinned photodiode yielded 176% and 80% higher response current than N+ diffusion/ P substrate (N+/psub) and N well/P substrate (NW/psub) diodes respectively. However NW/psub diode exhibited 1.5 and 6.7 times more sensitivity to 20nm shift in gold nanorod spectrum when compared to pinned and N+/psub diodes respectively.
Keywords :
biosensors; gold; nanobiotechnology; nanorods; photodiodes; surface plasmon resonance; TSMC; bio detection; gold nanorods; in field detection; nanoscale biosensor chip; photodiodes; pinned photodiode; surface plasmon resonance; Absorption; Biosensors; Diodes; Gold; Integrated circuit synthesis; Optical sensors; Photodiodes; Signal synthesis; Signal to noise ratio; Substrates; Gold nanorod; SPR; biosensor; photodiode;
Conference_Titel :
Circuits and Systems (MWSCAS), 2010 53rd IEEE International Midwest Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4244-7771-5
DOI :
10.1109/MWSCAS.2010.5548781
