Prefer-oriented Cu2O Micro-crystals: SAM Templated Growth and DMMP-vapor Detection

doi:10.3724/SP.J.1077.2011.11189

Journal of Inorganic Materials ›› 2011, Vol. 26 ›› Issue (10): 1111-1115.DOI: 10.3724/SP.J.1077.2011.11189

• Research Letter • Previous Articles Next Articles

Prefer-oriented Cu₂O Micro-crystals: SAM Templated Growth and DMMP-vapor Detection

YANG Tian-Tian, XU Peng-Cheng, ZUO Guo-Min, LI Xin-Xin

(State Key Lab of Transducer Technology, Science and Technology on Microsystem Lab, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China)

Received:2011-03-29 Revised:2011-04-19 Published:2011-10-20 Online:2011-09-20
About author:YANG Tian-Tian(1984-), female, PhD candidate. E-mail: ytt@mail.sim.ac.cn
Supported by:
National Natural Science Foundation of China (60725414, 91023046); 973 Program (2011CB309503)

Abstract

Abstract: With self-assembled monolayer (SAM) as template, cubic cuprous-oxide (Cu₂O) crystals with preferred orientation are obtained via simple and effective electrochemical redox process. Micro-region X-ray diffraction (XRD) and scanning electron microscope (SEM) were used to characterize the as-grown Cu₂O crystals. Besides uniform morphology and crystal size, the micro-crystals take preferred orientation that is strongly influences by the pre-modified SAM on substrate. The experiments indicate that the SAM not only acts as the growing template for the crystals, but also strongly affects the electrochemical redox process. To explore its sensing properties, the Cu₂O crystals were grown onto a micro-cantilever to detect DMMP (dimethyl methylphosphonate) vapor. The sensing mechanism is complexation of phosphonyl group with Cu(I) that generates surface-stress at the cantilever surface. Tens of ppb DMMP vapor is reproducibly detected.

Key words: cuprous oxide, preferred orientation, electrochemical redox, self-assembled monolayers, gas sensor

CLC Number:

TQ174
O782

YANG Tian-Tian, XU Peng-Cheng, ZUO Guo-Min, LI Xin-Xin. Prefer-oriented Cu₂O Micro-crystals: SAM Templated Growth and DMMP-vapor Detection[J]. Journal of Inorganic Materials, 2011, 26(10): 1111-1115.

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Prefer-oriented Cu₂O Micro-crystals: SAM Templated Growth and DMMP-vapor Detection

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