Results 31 to 40 of about 2,331,212 (353)

Plasticized PVC Membrane Modified Electrodes: Voltammetry of Highly Hydrophobic Compounds

open access: yesMembranes, 2020
In the last 50 years, plasticized polyvinyl chloride (PVC) membranes have gained unique importance in chemical sensor development. Originally, these membranes separated two solutions in conventional ion-selective electrodes.
Ernő Lindner   +3 more
doaj   +1 more source

Detection of amplitude modulation with squeezed light for sensitivity beyond the shot-noise limit [PDF]

open access: yes, 1988
An improvement in precision beyond the limit set by the vacuum-state or zero-point fluctuations of the electromagnetic field is reported for the detection of amplitude modulation encoded on a weak signal beam. The improvement is achieved by employing the
Kimble, H. J., Wu, Ling-An, Xiao, Min
core   +1 more source

Electronic Nose Testing Procedure for the Definition of Minimum Performance Requirements for Environmental Odor Monitoring

open access: yesSensors, 2016
Despite initial enthusiasm towards electronic noses and their possible application in different fields, and quite a lot of promising results, several criticalities emerge from most published research studies, and, as a matter of fact, the diffusion of ...
Lidia Eusebio   +2 more
doaj   +1 more source

Comparison of Sensitivity and Quantitation between Microbead Dielectrophoresis-Based DNA Detection and Real-Time PCR

open access: yesBiosensors, 2017
In this study, we describe a microbead-based method using dielectrophoresis (DEP) for the fast detection of DNA amplified by polymerase chain reaction (PCR).
Michihiko Nakano   +2 more
doaj   +1 more source

Optimal multi-photon phase sensing with a single interference fringe [PDF]

open access: yes, 2013
Quantum entanglement can help to increase the precision of optical phase measurements beyond the shot noise limit (SNL) to the ultimate Heisenberg limit. However, the N-photon parity measurements required to achieve this optimal sensitivity are extremely
Hofmann, H. F.   +2 more
core   +2 more sources

Calibration of a single atom detector for atomic micro chips [PDF]

open access: yes, 2007
We experimentally investigate a scheme for detecting single atoms magnetically trapped on an atom chip. The detector is based on the photoionization of atoms and the subsequent detection of the generated ions.
A. Günther   +11 more
core   +2 more sources

Comparing the fundamental limit of detection for interferometric and resonant biosensors with coherent phase read-out [PDF]

open access: yes, 2019
We compare the limit of detection of coherently interrograted photonic biosensors, using both interferometric and resonant architectures.Universidad de Málaga.
Halir, Robert   +4 more
core   +1 more source

Quantum state magnification

open access: yes, 2016
Quantum metrology exploits entangled states of particles to improve sensing precision beyond the limit achievable with uncorrelated particles. All previous methods required detection noise levels below this standard quantum limit to realize the benefits ...
Engelsen, N. J.   +3 more
core   +1 more source

Sub-shot-noise shadow sensing with quantum correlations [PDF]

open access: yes, 2017
The quantised nature of the electromagnetic field sets the classical limit to the sensitivity of position measurements. However, techniques based on the properties of quantum states can be exploited to accurately measure the relative displacement of a ...
Edgar, Matthew P.   +5 more
core   +1 more source

A modified TCAD simulation model for a-InGaZnO based ISFETs on GaAs substrate for pH sensing applications

open access: yesMaterials Research Express, 2021
In this paper, an ISFET model is established and its accuracy is verified. The model can overcome the limitation of TCAD of not supporting electrolyte solution simulation.
Hui Wang, Naiyun Tang
doaj   +1 more source

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