Integration of metal oxide nanobelts with microsystems for nerve agent detection

Yu, Choongho; Hao, Qing; Saha, Sanjoy Kumar; Shi, Li; Kong, Xiangyang; Wang, Zhong Lin

doi:10.1063/1.1861133

Cited by 146 publications

(109 citation statements)

References 19 publications

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“…sensor built used a single SnO 2 nanobelt for detecting dimethyl methylphosphonate (DMMP), a nerve agent stimulant, at 50 ppb level [4]. The sensor operates at 1.5 V and the electrical current is in the range of 2 3 nA, which means the power needed to operate this nanosensor is 5 nW excluding the heating unit.…”

Section: Nano Researchmentioning

confidence: 99%

Energy harvesting for self-powered nanosystems

Wang

2008

Nano Res.

127

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In this article, an introduction is presented about the energy harvesting technologies that have potential for powering nanosystems. Our discussion mainly focuses on the approaches other than the well-known solar cell and thermoelectrics. We mainly introduce the piezoelectric nanogenerators developed using aligned ZnO nanowire arrays. This is a potential technology for converting mechanical movement energy (such as body movement, muscle stretching, blood pressure), vibration energy (such as acoustic/ultrasonic wave), and hydraulic energy (such as fl ow of body fl uid, blood fl ow, contraction of blood vessel, dynamic fl uid in nature) into electric energy for self-powered nanosystems.

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Section: Nano Researchmentioning

confidence: 99%

Energy harvesting for self-powered nanosystems

Wang

2008

Nano Res.

127

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“…Sensing is achieved by monitoring the DC conductance change (first term in equation 1) as a result of molecule-sensor interaction. To date, semiconductor nanowires, carbon nanotubes, graphene and MoS 2 have been explored as DC nanoelectronic vapour sensors [12][13][14][15][16][17] , with sensitivity down to the ppb level. However, the biggest challenge for such DC nanoelectronic vapour sensors is their extremely slow sensing response and recovery, typically on the order of tens to hundreds of seconds 7,8,[12][13][14][15] .…”

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confidence: 99%

Graphene nanoelectronic heterodyne sensor for rapid and sensitive vapour detection

et al. 2014

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Nearly all existing nanoelectronic sensors are based on charge detection, where molecular binding changes the charge density of the sensor and leads to sensing signal. However, intrinsically slow dynamics of interface-trapped charges and defect-mediated charge-transfer processes significantly limit those sensors' response to tens to hundreds of seconds, which has long been known as a bottleneck for studying the dynamics of molecule-nanomaterial interaction and for many applications requiring rapid and sensitive response. Here we report a fundamentally different sensing mechanism based on molecular dipole detection enabled by a pioneering graphene nanoelectronic heterodyne sensor. The dipole detection mechanism is confirmed by a plethora of experiments with vapour molecules of various dipole moments, particularly, with cis-and trans-isomers that have different polarities. Rapid (down to B0.1 s) and sensitive (down to B1 ppb) detection of a wide range of vapour analytes is achieved, representing orders of magnitude improvement over state-of-the-art nanoelectronics sensors.

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“…Figure 1(a) shows a schematic diagram of the micro device structure. The detailed micro-fabrication process can be found elsewhere [1], [5], [6]. Figure 1(b) is a microscopic image of the micro device, which shows the suspended structure and the nanobelt bridging between the two Pt electrodes.…”

Section: Experiments Sample Detailsmentioning

confidence: 99%

“…Then, the two Pt electrodes in the micro device were connected to an ac voltage source. The solution that contains the nanobelts was dropped on the wafer surface and assembled on the micro device according to a procedure described elsewhere [6]. A focused ion beam (FIB) technique was used to deposit a thin and narrow Pt coating on the contact location between the nanobelt and each electrode so as to improve the electrical and thermal contact [6].…”

Section: Experiments Sample Detailsmentioning

confidence: 99%

Characterization of Heat Propagation along Single Tin Dioxide Nanobelt Using the Thermoreflectance Method

et al. 2007

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In this paper, we studied heat transfer properties of a single tin dioxide nanobelt using non-contact high resolution thermoreflectance imaging technique. Temperature difference across the nanobelt was created by attaching its both ends to a microfabricated thin film heater and sensor pair. High resolution thermal images of the nanobelt and thin film devices were obtained at variant pulsing current amplitudes and frequencies, which allowed us to study the inherent thermal conductance of the nanobelt. Thermoreflectance coefficient change was found to significantly affect the thermoreflectance measurement results. INTRODUCTIONOne-dimensional nanostructures such as nanowires and nanobelts have been studied extensively during the past few years. Compared to bulk materials, in low dimensional inorganic nanostructures, quantum effects and high surface to volume ratio become important. The modified density of electronic states and increased surface scattering, etc, can alter the bulk properties substantially. These significant differences promise one-dimensional nanostructures important applications in the emerging nano-electronic and nano-optical industry. Among all functional nanostructures, the ribbon-or belt-like metal oxide, such as tin dioxide (SnO 2 ), zinc oxide (ZnO 2 ) and Indium oxide (In 2 O 3 ) nanostructures are unique due to the reason that they are essentially single-crystalline semiconductors without the presence of a surface insulating layer of native oxides [1].Thermal transport property is one of the key factors limiting the performance and reliability of all nano-electronic and nano-optoelectronic devices. Metal oxide nanobelts or nanoribbons provide interesting systems for studying heat propagation behavior in low dimension. However, measurement of thermal properties on such small objects is non-trivial. As of today, only a few thermal characterization techniques are able to achieve nanoscale spatial resolution and sub-degree temperature resolution at the same time [2]. Here, we utilized thermoreflectance imaging technique. It is a non-contact temperature measurement technique that eliminates the thermal leakage error accompanied by making thermal contact. We have obtained thermal profiles along a single tin dioxide (SnO 2 ) nanobelt with various bias currents amplitudes and frequencies applied to the attached micro device.

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Integration of metal oxide nanobelts with microsystems for nerve agent detection

Cited by 146 publications

References 19 publications

Energy harvesting for self-powered nanosystems

Energy harvesting for self-powered nanosystems

Graphene nanoelectronic heterodyne sensor for rapid and sensitive vapour detection

Characterization of Heat Propagation along Single Tin Dioxide Nanobelt Using the Thermoreflectance Method

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