Results 31 to 40 of about 37,306 (280)

A cellulose-based bioassay for the colorimetric detection of pathogen DNA [PDF]

open access: yes, 2014
Cellulose-paper-based colorimetric bioassays may be used at the point of sampling without sophisticated equipment. This study reports the development of a colorimetric bioassay based on cellulose that can detect pathogen DNA.
Goyal, Madhu   +3 more
core   +1 more source

A novel colorimetric biosensor based on non-aggregated Au@Ag core–shell nanoparticles for methamphetamine and cocaine detection [PDF]

open access: yes, 2017
We report a novel colorimetric biosensor based on non-aggregation Au@Ag core-shell nanoparticles to detect methamphetamine and cocaine. The biosensor consisted of a reporter probe (RP) that is a specific single-stranded DNA (ssDNA) sequence coated on Au ...
Hu, Jiming   +5 more
core   +1 more source

High Sensitivity DNA Detection Using Gold Nanoparticle Functionalised Polyaniline Nanofibres [PDF]

open access: yes, 2010
Polyaniline (PANI) nanofibres (PANI-NF) have been modified with chemically grown gold nanoparticles to give a nanocomposite material (PANI-NF–AuNP) and deposited on gold electrodes. Single stranded capture DNA was then bound to the gold nanoparticles and
Barry, Thomas   +8 more
core   +1 more source

Ultrasensitive tapered optical fiber refractive index glucose sensor

open access: yesScientific Reports, 2023
Refractive index (RI) sensors are of great interest for label-free optical biosensing. A tapered optical fiber (TOF) RI sensor with micron-sized waist diameters can dramatically enhance sensor sensitivity by reducing the mode volume over a long distance.
Erem Ujah, Meimei Lai, Gymama Slaughter
doaj   +1 more source

Functionalization Strategies of PEDOT and PEDOT:PSS Films for Organic Bioelectronics Applications

open access: yesChemosensors, 2021
Organic bioelectronics involves the connection of organic semiconductors with living organisms, organs, tissues, cells, membranes, proteins, and even small molecules.
Gonzalo E. Fenoy   +3 more
doaj   +1 more source

Practical Characterization of Cell-Electrode Electrical Models in Bio-Impedance Assays [PDF]

open access: yes, 2018
This paper presents the fitting process followed to adjust the parameters of the electrical model associated to a cell-electrode system in Electrical Cell-substrate Impedance Spectroscopy (ECIS) technique, to the experimental results from cell-culture ...
Daza Navarro, María Paula   +7 more
core   +1 more source

Responsive materials and mechanisms as thermal safety systems for skin-interfaced electronic devices

open access: yesNature Communications, 2023
Minimizing patient risk to thermal failure in wearable electronics typically requires complex circuit control, sensors, or passive materials. Here, Yoo et al.
Seonggwang Yoo   +13 more
doaj   +1 more source

A chemical sensor based on a photonic-crystal L3 nanocavity defined in a silicon-nitride membrane [PDF]

open access: yes, 2014
The application of a silicon-nitride based L3 optical nanocavity as a chemical sensor is explored. It is shown that by adjusting the thickness of an ultra-thin Lumogen Red film deposited onto the nanocavity surface, the fundamental optical mode undergoes
Brittle, Stuart   +6 more
core   +1 more source

Flexible electronics with dynamic interfaces for biomedical monitoring, stimulation, and characterization

open access: yesInternational Journal of Mechanical System Dynamics, 2021
Recent developments in the fields of materials science and engineering technology (mechanical, electrical, biomedical) lay the foundation to design flexible bioelectronics with dynamic interfaces, widely used in biomedical/clinical monitoring ...
Xu Guo   +3 more
doaj   +1 more source

The critical sensor: a new type of evanescent wave immunosensor [PDF]

open access: yes, 1996
A new planar waveguide immunosensor has been developed in which adsorption at a surface, changing the refractive index contrast, is measured. In this ¿critical¿ sensor the change in the effective refractive index contrast is transducted to a shift of the
Borreman, A.   +3 more
core   +3 more sources

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