Sensors, MEMS, Electronics – Page 171

Bacterial Concentration Detection with Dielectrophoresis and Capacitive Measurement

Yoo J-H, Cha M.S., Lee J., Seoul National University, KR

The concentration of Escherichia coli (E.coli) cells in water was detected by depositing them on an array of electrodes using dielectrophoresis (DEP). Electrowetting was used to effectively concentrate the E.coli in a droplet of water [...]

Polysilicon Nano-wires Based Nano-device on Silicon Chip: Fabrication and its Application

Mishra N.N., Winterrowd P., Nelson R., Maki G., Maki W.C., Rastogi S.K., Cameron E., Filanoski B., Maki G., Maki W.C., University of Idaho, US

5x5 arrays of six nano-transistor devices were fabricated on p-type silicon/silicon oxide (200nm) wafers with resistivity 1-100 -cm. 50nm of doped polysilicon were deposited and annealed to make nanowires. All nanowires were made with direct [...]

Fabrication of interdigitated nanogap devices for biomolecular detection

Park H.J., Chi Y.S., Ah C.S., Ha D.H., Choi I.S., Yun W.S., Korea Research Institute of Standards and Science (KRISS), KR

One of the most fascinating fields of nanodevice research is its application to the detection of biologically important entities such as DNAs, peptides, antigens, enzymes, viruses, and cells. Nanoelectronic devices adopted in this study are [...]

Anodic aluminum oxide-based capacitive humidity sensor integrated with micro-heater

Kim Y.D., Jung B.B., Lee H.K., Lee K.H., Lee H.K., Lee K.H., Park H.C., Pohang University of Science and Technology, KR

AAO(Anodic Aluminum Oxide) film is fabricated as a sensing material of capacitive humidity sensors. Because AAO films have a lot of nano-size pores, many water vapors can be absorbed. The size of a pore diameter [...]

Polymer nanocomposite based chemiresistive gas sensors

Meka D.A., George L.A., Prasad S., Portland State University, US

We present here the development of a polymer nanocomposite based gas sensor for detecting trace gas emissions in ambient environment. This project is aimed to build a chemiresistive gas sensor with excellent sensitivity and improved [...]

Identification of bacterial susceptibility to antibiotics using gold nanoparticles

Perez J.M., Kaittanis C., Nath S., University of Central Florida, US

Inexpensive and rapid methods for detecting bacterial infections and their corresponding susceptibility to antibiotics are desperately needed. The determination of which antibiotic to use and its administration at dosages that will effectively suppress bacterial growth [...]

Capacitance signatures for rapid detection of the polarity of the dielectrophoretic force on single yeast cells

Ferrier G.A., Romanuik S.F., Thomson D.J., Bridges G.E., Freeman M.R., University of Manitoba, CA

Previously, we demonstrated a system that can detect the presence of yeast cells using capacitance measurements from a cavity resonator. The resonator is coupled to a set of electrodes, which are aligned 90 degrees relative [...]

Micro-Retroreflectors in Immunoassays and Biosensors

Kemper S.M., Sherlock T., Knoop J.D., Cacao E., Ruchhoeft P., Atmar R.L., Willson R.C., University of Houston, US

Many current bioanalytical and diagnostic methods rely on labeling the species of interest and specialized detection equipment to monitor the label. Common techniques suffer from signal loss or degradation and require the use of equipment [...]

Selective Identification of proteins by laser desorption ionization mass spectrometry on photonic nanodevices coupled to abiotic receptors

Meagley R.P., ONE Nanotechnologies, LLC, US

Matrix Assisted Laser Desorption Ionization Mass Spectroscopy (MALDI MS) is a particularly efficient tool for proteomics research and diagnostics with protein biomarkers. Recent innovations in the application of inorganic matrices have enabled a reduction in [...]

DNA Amplification by PCR using Low cost, Programmable Microwave Heating

Garg P., Hella M., Borca-Tasiuc D.-A., Mohamed H., Rensselaer Poytechnic Institute, US

This work presents a low power microstrip transmission line PCR thermo-cycler based on microwave heating that is designed for low-budget, portable/Point of Care (POC) genetic analysis. Previous efforts on miniaturized PCR chambers focused mainly on [...]