Solar-blind deep-ultraviolet (DUV) photoconductive detectors based on an LaAlO(3) (LAO) single crystal with interdigitated electrodes are reported. The LAO detectors show a high sensitivity to DUV light with wavelengths less than 210 nm, and the DUV/UV (200 versus 290 nm) contrast ratio is more than 2 orders of magnitude. The photocurrent responsivity of LAO detector reaches 71.8 mA/W at 200 nm...

Ion track, nanoporous membranes were employed as templates for the preparation of CdTe nanowires. For this purpose, electrochemical deposition from a bath containing Cd and Te ions was employed. This process leads to high aspect ratio CdTe nanowires, which were harvested and placed on a substrate with lithographically patterned, interdigitated electrodes. Focused ion beam-induced metallization ...

Graphene has unique optical and electronic properties that make it attractive as an active material for broadband ultrafast detection. We present here a graphene-based detector that shows 40-picosecond electrical rise time over a spectral range that spans nearly three orders of magnitude, from the visible to the far-infrared. The detector employs a large area graphene active region with interdi...

The authors present dielectrophoresis DEP -based tweezers that can be used to characterize the interactions between a particle and the surface it is attached to, within a microfluidic device. As a proof of concept, 5.4 m polystyrene beads functionalized by carboxyl group were attached on a bare and poly-L-lysine functionalized oxide surface. Negative dielectrophoresis force was generated using ...

We present a novel analysis technique for automated characterization of particles and cells using dielectrophoresis (DEP). We combine an automated experimental system to measure DEP particle trapping via fluorescence intensity with physically informed computational methods and sophisticated particle models to make robust measurements of DEP force magnitude. The system uses a LabVIEW-controlled ...

We show that dielectrophoresis (DEP) spectroscopy is an effective transduction mechanism for detection of the concentration levels pancreatic cancer biomarkers antigen (CA) 242 and carcinoembryonic (CEA) in serum. noticed a frequency dependence negative DEP force applied by interdigitated electrodes on functionalized polystyrene microspheres (PM) with respect to changes number these antigens bo...

We combined a multi-sensor glass-chip with a microfluidic channel grid for the characterization of cellular behavior. The grid was imprinted in poly-dimethyl-siloxane. Mouse-embryonal/fetal calvaria fibroblasts (MC3T3-E1) were used as a model system. Thin-film platinum (Pt) sensors for respiration (amperometric oxygen electrode), acidification (potentiometric pH electrodes) and cell adhesion (i...

This paper reports a multilayered, automated PDMS based microTAS for rapid, high-sensitivity and point-of-care insulin detection. Two generations of microTAS differing in their design complexity and insulin detection protocol were compared. The first generation microTAS includes one micropump, one micromixer and interdigitated electrodes to perform flow through impedance spectroscopy for insuli...

O(2) reactivity of a functional NOR model is investigated by using electrochemistry and spectroscopy. The electrochemical measurements using interdigitated electrodes show very high selectivity for 4e O(2) reduction with minimal production of partially reduced oxygen species (PROS) under both fast and slow electron flux. Intermediates trapped at cryogenic temperatures and characterized by using...

The ZnO:Al thin films were prepared by RF magnetron sputtering on Si substrate using Pt as interdigitated electrodes. The structure was characterized by XRD and SEM analyses, and the ethanol vapor gas sensing as well as electrical properties have been investigated and discussed. The gas sensing results show that the sensitivity for detecting 400 ppm ethanol vapor was ~20 at an operating tempera...