- Hybrid materials made of carbon nanotubes and semiconductor metal oxides for gas sensing applications.
- Low dimensional nanostructures (nanoparticle and nanowires) of metal oxides for gas sensing applications.
- Synthesis, characterizations, and applications of GRAPHENE.
- Nanofibres via electrospinning for nanosensors, nanocatalysis, filtration, and protective clothing.
In-stitute decoration of Pd nanocrystal on crystalline mesoporous NiO nanosheets for effective hydrogen gas sensors
Posted Aug 1, 2013, 1:08 AM by Sensors VNBy: Phan Van Tong, Nguyen Duc Hoa, Vu Van Quang, Nguyen Van Duy, Nguyen The Lam Nguyen Van Hieu (International Journal of Hydrogen Energy)
Polyaniline Nanowires-Based Electrochemical Immunosensor for Label Free Detection of Japanese Encephalitis Virus
Posted Jul 11, 2013, 3:04 AM by Sensors VNBy: Chu Van Tuan, Tran Quang Huy, Nguyen Van Hieu, Mai Anh Tuan & Tran Trung (Analytical Letters)Full paper
On-chip growth of wafer-scale planar-type ZnO nanorod sensors for effective detection of CO gas
Posted Apr 21, 2013, 7:26 PM by Sensors VNBy: Nguyen Duc Khoang, Hoang Si Hong, Do Dang Trung, Nguyen Van Duy, Nguyen Duc Hoa, Dao Duc Thinh, Nguyen Van Hieu (Sensors and Actuators B: Chemical)
Single-crystal zinc oxide nanorods with nanovoids as highly sensitive NO2 nanosensors
Posted Jul 11, 2013, 3:09 AM by Sensors VNBy: Hoang Van Han, Nguyen Duc Hoa, Pham Van Tong, Hugo Nguyen, Nguyen Van Hieu (Materials Letters)
Abstract: Design and synthesis of nanostructured materials with a highly porous crystal structure and high specific surface area are the key issues to an enhanced gas sensing performance. This letter introduces a simple and scalable hydrothermal method to fabricate single-crystal ZnO nanorods (NRs) with nanovoids (NVs) for highly sensitive NO2 nanosensors. The fabricated ZnO NRs have a single-crystal structure with an average length and diameter of about 900 nm and 23 nm, respectively. NVs of less than 5 nm size are found frequently along the NRs. Gas-sensing characterizations revealed that the ZnO NR sensors exhibited a relatively high response to sub-ppm NO2 with excellent stability after 8 cycles of switching from NO2 to dry air without significant response reduction...Full paper
Crystalline mesoporous tungsten oxide nanoplate monoliths synthesized by directed soft template method for highly sensitive NO2 gas sensor applications
Posted Jul 11, 2013, 3:10 AM by Sensors VNBy: Nguyen Duc Hoa, Nguyen Van Duy, Nguyen Van Hieu (Materials Research Bulletin)
Abstract: Controllable synthesis of nanostructured metal oxide semiconductors with nanocrystalline size, porous structure, and large specific surface area is one of the key issues for effective gas sensor applications. In this study, crystalline mesoporous tungsten oxide nanoplate-like monoliths with high specific surface areas were obtained through instant direct-templating synthesis for highly sensitive nitrogen dioxide (NO2) sensor applications. The copolymer soft template was converted into a solid carbon framework by heat treatment in an inert gas prior to calcinations in air to sustain the mesoporous structure of tungsten oxide. The multidirectional mesoporous structures of tungsten oxide with small crystalline size, large specific surface area, and superior physical characteristics enabled the rapid and effective accession of analytic gas molecules. As a result, the sensor response was enhanced and the response and recovery times were reduced, in which the mesoporous tungsten oxide based gas sensor exhibited a superior response of 21,155% to 5 ppm NO2. In addition, the developed sensor exhibited selective detection of low NO2concentration in ammonia and ethanol at a low temperature of approximately 150 °C. Full paper
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