Chemical, Physical & Bio-Sensors – Page 21

Development of micro-lateral flow strips compatible with micro-volume samples for immunochemical assays

Sharma N.S., Lukyanov A., Bardell R.L., Shen M., Weigl B.H., MicroPlumbers Microsciences, LLC, US

The benefits of the lateral flow strip immunochromatographic test format are well known. However, currently available lateral flow strip assays are not compatible with sub-microliter sample volumes. The authors believe that assays compatible with micro-volume [...]

Label-Free Protein Nano-Biosensor Using Top-Down Fabrication

Ah C.S., Ahn C-G, Kim A., Yu H.Y., Ahn C-G, Yang J.H., Baek I-B, Park C.W., Jun M.S., Lee S.J., Electronics and Telecommunications Research Institute (ETRI), KR

A nanosensor of n-type Si field-effect transistor (FET) via “top-down method” was employed to monitor PSA with great selectivity and high sensitivity up to 10 pg/mL. When a biomaterial, negatively charged PSA, is introduced through [...]

Electronic DNA detection on semiconductor surfaces

Han Y., Tan E., Candebat D., Bandyopadhyay K., Niemz A., Keck Graduation Institute, US

Electronic biosensors offer a viable alternative to optical biosensors for the rapid, specific, and sensitive detection of DNA. We are utilizing an electrolyte-oxide-semiconductor (EOS) biosensor system on a SiO2/Si surface for impedimetric detection of DNA. [...]

Synthesis of a nano electro-magnetic polymer and its application in a DCT biosensor

Pal S., Hummel E.B., Alocilja E.C., Michigan State University, US

This experimental study was focused on the development of a nanomagnetic conductive polymer and its application in a direct-charge transfer biosensor (Figure1) for the detection of Bacillus species. A polyaniline-γFe2O3 nanocomposite transducer was first synthesized [...]

Nanoelectrodes with Selective Molecular Receptors for Label-Free Electronic Detection of Thrombin

Dong J., Parviz B.A., University of Washington, US

The enzyme thrombin plays a crucial role in the regulation of blood coagulation. We present a sensor that can directly detect this enzyme and generate an electronic signal. The sensor structure consists of three electrodes [...]

Fabrication of Molecularly Imprinted Uric Acid Biosensors based on a Novel Amine-Imide Type Conducting Polymer

Chen P.Y., Ho K.C., National Taiwan University, TW

In this work, the major contribution is fabricating a uric acid (UA) biosensor based on molecular imprinted technique using a novel conducting polymer. Calibration curves were depicted according to the amperometric detection of steady current [...]

An amperometric on-chip glucose biosensor based on enzyme entrapment with pre-reaction to lower interference in a flow injection system

Nien P.-C., Huang M.-C., Chang F.-Y., Ho K.C., National Taiwan University, TW

In this study, the flow injection analysis was applied to the enzyme-entrapped sensor on a chip for sensing glucose. The microelectrode arrays on a chip of 7×3.5 cm2 were fabricated by standard photolithographic and the [...]

Nanomechanical Cantilever Bio-Sensors for Time-Resolved Detection of DNA and Surface Layer Formation

Bammerlin M., Köser J., Shahgaldian P., Pieles U., Battiston F.M., Hubler U., Concentris GmbH, CH

Nanomechanical cantilever are small and extremely sensitive force and mass detectors. By coating (functionalizing) their surface with specific receptor molecules, cantilevers can be converted into highly sensitive and selective chemical sensors or label-free biosensors. The [...]

Fabrication and Characterization of Nano-Field Effect Transistor for Bio-safety

Mishra N., Winterrowd P., Nelson R., Rastogi S., Maki G., Maki W., Maki G., Maki W., University of Idaho, US

The sensitive and robust detection of harmful biological and chemical molecules in the various samples have incredible significance in modern healthcare. New research in the field of nanowires has evidence that nanowire based diagnostic methods [...]

Evaluation of silver nanostructures fabricated using glancing angle depostion as localized surface plasmon resonance biosensors

Gish D.A., Nsiah F., McDermott M.T., Brett M.J., University of Alberta, CA

The localized surface plasmon resonance (LSPR) biosensing capability of 175 nm thick silver nanoparticle films produced by glancing angle deposition (GLAD) was evaluated. The extinction spectra of the films exhibited a peak around a wavelength [...]