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The following topics are dealt with: biosensing; nano-biotechnology; MEMS and NEMS; nano-materials; AFM based nano robotic manipulations; nano-biomedicine; carbon nanotubes; spintronics; nanobiosensors; nano-magnetics; nano-fabrication; nanowires and nanotubes; nano-photonics; nano-optics; opto-electronics; nano system and reliability; nano-particles; nano-optoelectronics; molecular electronics; nanomanufacturing;...
Sensing devices using electronic-grade carbon nanotubes (EG-CNTs) as resistive sensing element were fabricated by dielectrophoresis (DEP) manipulation. DEP-based fabrication of EG-CNTs is important as it allows some control of the nominal resistance of the fabricated sensors, which is essential to improve the SNR of CNT sensors. The devices were characterized and the potential of EG-CNTs to serve...
We have constructed a piezoelectric sensor matrix with the capability of measuring the flexibility of immunoglobulin. The matrix consisted of 6 independent quartz crystal microbalance (QCM) coated with gold nanoparticles (GNP) of 3.5, 5, 12, 17, and 37 nm, and BSA. The detection was performed simultaneously. Antiserum against GNP bound to QCMs coated with 3.5 nm GNP and maximized for 5 nm GNP-coated...
This work demonstrates the use of surface acoustic wave (SAW) atomization together with a nonuniform evaporation and nucleation process to give sub-50-nm diameter monodisperse nanoparticles. SAW atomization is a straightforward and energy efficient technique to generate relatively homogeneous particle size distributions that can be carried out on a chip-scale microdevice for portable drug delivery...
A 'nanocavity' protein biosensor fabricated using the molecular imprinting technique has been developed. We employed microcontact printing to form molecular imprints in a polymer thin-film to act as 'artificial antibodies' for protein recognition. Proteins considered to be important biomarkers in clinical diagnosis were chosen as our templates, namely: Creactive protein, ribonuclease, lysozyme and...
This paper presents a study of electrokinetic transport in a nano-fluidic chip that allow for separation and pre-concentration of the molecular mixtures into a high density multi-wall carbon nano tubes (MWCNTs) array of nano-channels. The MWCNTs array was used as an induced-surface charge filter to attract the opposite charged molecules on the wall surface by van der Waals and electrostatic force...
A micromachined vibratory gyroscope with two proof-masses to measure rotation rate is presented. The two proof-masses are driven electrostatically in opposite directions along drive axis to generate differential Coriolis force detection. In order to improve the performance of the MEMS gyroscope, an adaptive control method is developed. This scheme tunes the drive natural frequencies of gyroscope to...
This paper presents the design and development of a MEMS based, capacitive sensor for micro-force measurement. The sensor has an overall dimension of 3600 mum times 1000 mum times 10 mum and was fabricated using the Micragem fabrication process. A displacement reduction mechanism is incorporated in this sensor design to increase the sensitivity of the sensor. Analysis from Finite Element software,...
Recently, nanocomposite materials have caught a wide attention due to their excellent properties. In this study, the Nickel-Alumina (Ni-Al2O3) nanocomposite as a new material for high temperature and high stress applications was investigated. Effects of the surfactant, temperature, and current density on the surface morphology, surface roughness, and mechanical property of the electrochemically synthesized...
Due to MEMS device needs highly accurate design, a novel design methodology for MEMS device is put forward in this paper. Firstly, top-down and bottom-up hybrid design process based on IP library is proposed. It facilitates and speeds up design cycle and reduces the expense of MEMS design by using IP components which have been successfully implemented. Secondly, virtual fabrication process is proposed...
We present a successful synthesis of single crystalline homogeneous Si1-xGex nanowires (diameter: 7~52 nm) via vapor-liquid-solid mechanism. Results show that quality, density, and growth rate of Si1-xGex nanowires are greatly affected by the growth temperature and the single crystalline Si1-xGex nanowires without amorphous sheath layer can be obtained at optimized growth temperature. Control of the...
This paper describes a new data preparation technique, which allows for the design of optical lenses in a conventional CAD package and immediate transfer to a lithographic system, for example Electron Beam or Focused Ion Beam Lithography. Most importantly, we show that this approach could be used to fabricate lens arrays in templates for Step-and Flash Imprint lithography onto 4iquestwafers. One application...
Here, we have successfully fabricated high performance mainspring by co-electrodeposition of functionalized multi-walled carbon nanotubes coating in the presence of chitosan. The functionalized multi-walled carbon nanotubes (f-MWCNTs) can be easily electro-deposited with chitosan onto the mainspring under a moderate condition, with controllable film thickness from a few hundred nanometers to tens...
Multilayer hybrid thin films consisting of alternating layers of organic and inorganic materials were fabricated with powder of copper-phthalocyanine (CuPc) and zinc selenide (ZnSe) by electron beam evaporator. The structural and optical characterization of multilayer hybrid thin film were carried out by using X-ray diffraction (XRD), atomic force microscope (AFM) and UV-Vis absorption spectroscopy...
Well aligned Si nanowires (SiNWs) by Vapor-Liquid-Solid growth process are presented. Instead of using H2, the current work uses N2 as carrier gas. The growth conditions of SiNWs are controlled by the ratio of nitrogen versus silane gas. Tapering of nanowires was found at T=620degC and P=333 m torr, and the tapering parameter was reduced by increasing the N2 gas. Tapering of nanowires is attributed...
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