Nano Devices and Systems – TechConnect Briefs

Frequency Stability and Noise Characteristics of Ultra-High Frequency (UHF) Nanoelectromechanical Resonators

Feng X.L., Roukes M.L., California Institute of Technology, US

Nanoelectromechanical systems (NEMS) are emerging as great candidates for a variety of technological applications ranging from sensors and actuators to signal processing and communications [1]. Nanofabricated high-frequency (often in the VHF/UHF bands) electromechanical resonators (i.e., [...]

Flame Made Nanoparticles for Gas Sensors

Mädler L., Pratsinis S.E., Sahm T., Gurlo A., Barsan N., Weimar U., University of California, Los Angeles, CH

Flame aerosol technology is one of the most widely used synthesis routes in manufacturing of commercial quantities of nanoparticles. The application of flame spray pyrolysis further broadens the spectrum of flame made powders and their [...]

Nanomechanical Sensor Platform Based On Piezo-Resistive Cantilevers

Thaysen J., Havsteen Jacobsen M., Kildemark Nielsen L., Cantion A/S, DK

Cantion has developed a piezo-resistive cantilever sensor for the detection of molecular interactions. The Cantion technology has been used for the detection of plastic explosives, DNA and proteins. The small sensor and readout footprint makes [...]

Nanostructured Gas Microsensor Platform

Routkevitch D., Polyakov O., Deininger D., Kostelecky C., Synkera Technologies, Inc., US

Nanostructured materials, with their small grain size, large number of grain boundaries, and high specific surface area, hold promise for significantly improving the performance of solid-state gas sensors. To fully realize this potential, precision nanoscale [...]

RuO2 and Ru Nanoparticles for MISiC-FET Gas Sensors

Salomonsson A., Roy S., Aulin C., Ojamäe L., Käll P.-O., Strand M., Sanati M., Lloyd Spetz A., IFM, SE

Catalytically active nanoparticles used as gate material on SiC-FET gas sensors. The goal is to improve the selsectivity and senstitivty.The sensors are sensitive towards oxidising and reducing gases (H2, NH3, C3H6).

Gold Removal and Recovery using Mesoporous Silica Adsorbents

Lam K.F., Yeung K.L., McKay G., Hong Kong University of Science and Technology, CN

This work investigates the selective removal of dissolved metal ions from aqueous solutions using MCM-41 adsorbents grafted with different chemical moieties. A systematic study was conducted to understand the adsorption mechanisms, in order to better [...]

Preparation of Zeolite Microspheres and their Application in Biology

Wong L.W., Yeung K.L., the Hong Kong University of Science and Technology, CN

The potential use of zeolite hollow microspheres in biological studies was illustrated in the study of formation of neuromuscular junction (NMJ). The hollow zeolite microspheres carry and locally deliver signalling molecules, thus mimicking the in [...]

Polyaniline Nanofibers and Composite Materials for Chemical Detection

Weiller B.H., Virji S., Baker C., Huang J., Li D., Kaner R.B., The Aerospace Corporation, US

Polyaniline is a conducting polymer with electrical properties that can change greatly upon exposure to various chemicals. Most notably, when polyaniline is exposed to strong acids and bases, the conductivity changes by greater than 8 [...]

Calculating Deflection of Micro-Cantilever with Self-Assembled Monolayer Molecules Using Molecular Dynamics Simulations

Kan H-C, Wang Y-T, Tsai S-H, National Center for High-performance Computing, TW

Self-assembled Monolayers (SAM) by spontaneous adsorption of molecules on microscale substrates have attracted a huge interest due to their scientific importance and potential uses in technological applications and health care industry. Diverse selections of SAM [...]

Preparation and Property of Novel CMC-tactile Sensors

Chen X., Yang S., Motojima S., Gifu University, JP

Carbon microcoils/nanocoils (CMC) have an interesting anisotropic morphology of 3D-herical/spiral structure such as a DNA or proteins. The CMC have double-helix or single-helix structure with a coil diameter of 0.05-10 _m and a coil pitch [...]

A Nanoelectronic Device Based on Endofullerene Peapod: Model Schematics and Molecular Dynamics Study

Kang J-W, Byun K.R., Lee H.J., Lee J-H., Lee H.J., Lee J-H., Hwang H-J., Chung-Ang University, KR

We investigated a nanoelectronic device based on multi endo-fullerenes shuttle memory element based on nanopeapods using classical molecular dynamics simulations. We suggested the model schematics of endo-fullerene shuttle memory device fabrication. The dynamics of the [...]

Enhanced Mass Sensing for Nanomechanical Resonators

De Greve K., De Vlaminck I., De Greve K., De Vlaminck I., Naulaerts R., Sivasubramaniam V., Lagae L., Tilmans H.A.C., Borghs G., IMEC, BE

A new method for improving the mass detection limit of nanomechanical resonators in crystalline silicon, compatible with scaling, is demonstrated. Clamped-clamped silicon beam resonators are fabricated with a non-rectangular, ‘diabolo’ cross-section starting from SOI wafers. [...]

Micromachined Nanocrystalline Silver Doped Tin Oxide Hydrogen Sulfide Sensor

Gong J., Chen Q., Lian M-R, Liu N-C, University of Central Florida, US

We report here an ultra high sensitive micromachined hydrogen sulfide gas sensor with nanocrystalline thin (100nm) silver doped SnO2 film. A polymeric sol-gel process has been successfully developed in fabricating the thin SnO2 nanofilm as [...]

Simultaneous Determination of Heavy Metals Using Array Based Optical Chemical Sensor

Choi Y., Ryoo D., Park S.H., Park S.Y., Park S.H., Park S.Y., Jeonju University, KR

A sol-gel optical chemical sensor encapsulated with complexing agents for simultaneous detection of selected heavy metals such as chromium, lead, mercury, and iron in aqueous media was fabricated. The sensor was prepared by acid catalyzed [...]

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