Sensors & Transducers Journal

    (ISSN 1726- 5479)

Special Issue, October 2007, pp. 140-146

The Development of Chemical Nanosensors

¹A. J. JIN, ^*J. LI, ^*Y. LU

Hoda Globe Company, Engineering Division, 800 W El Camino Real,

Mountain View, CA 94042, USA.

^*NASA, Ames Research Center, Mail Stop 230-3, Moffet Field, CA 94035, USA

Tel.: 001-650-853-3089

E-mail: aj.jin@ieee.org

Received: 17 September 2007   /Accepted: 19 September 2007   /Published: 8 October 2007

Abstract: This paper presents a study of the chemical nanosensors (CNS) for space and environmental applications, safety alert devices, etc. The high-resolution nanosensors are applied to detect the rocket fuel hydrazine leak. The CNS detects changes in the electrical conductivity response during the chemical species presence. When the hydrazine is leaked into air, it immediately dissociates into NO₂. As a result, we are actually detecting the NO₂ gas in the trace amount from the fuel leakage. In more detail, we will discuss the sensor chips preparation and process control in terms of the resistance range control while depositing the nanomaterials on the sensors. Furthermore, there will be detailed studies of the CNS response to the dry NO₂ in the ambient conditions. The inter-digitized electrode sensors are characterized to the variables of NO₂ concentration and nanomaterials.

Keywords: Chemical nano sensors, Hydrazine, Nano technology, Nanosensor stability

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