Results 81 to 90 of about 3,988,589 (240)

Microstructured optical fibres for gas sensing: design fabrication and post-fab processing

open access: yes, 2009
Air/silica Microstructured Optical Fibers (MOFs) offer new prospects for fiber based sensor devices. In this paper, two topics of particular significance for gas sensing using air guiding Photonic Bandgap Fibers (PBGFs) are discussed.
Petrovich, M.N.   +5 more
core   +1 more source

A single-event transient tolerant bandgap reference utilizing dual-modular-redundant (DMR) technique

open access: yesNuclear Engineering and Technology
—Bandgap reference (BG) is a crucial component commonly adopted in analog and mixed-signal systems. BG is vulnerable in space applications, which can lead to signal degradation and even subsequent module failure when subjected to heavy-ion strikes.
Jingtian Liu   +6 more
doaj   +1 more source

Charge‐Polarized Ni─S4 Single‐Atom Sites Drive Selective Photoreforming of Poly(lactic acid) to Lactate and Hydrogen

open access: yesAdvanced Functional Materials, EarlyView.
Atomically dispersed Ni–S4 sites on CdS nanorods induce interfacial charge polarization, directing photogenerated electrons to H2 evolution and holes to selective ester‐bond cleavage of poly(lactic acid). Without sacrificial reagents, this charge‐coupled system produces lactate while suppressing overoxidation, achieving an H2 evolution rate of 41.74 ...
Yu Yao   +8 more
wiley   +1 more source

Sub‐1 ms Optoelectronic Synapse Based on {ZnCdO/ZnO} Multilayer Structure for High‐Speed Neuromorphic Vision Systems

open access: yesAdvanced Functional Materials, EarlyView.
Eu‐doped {ZnCdO/ZnO} structures grown on Si are developed, showcasing dual‐functionality controlled by europium doping. While high europium concentration transforms the device into an ultrafast, self‐powered photodetector, low‐doped structures can be used as an optoelectronic synapse.
Igor Perlikowski   +3 more
wiley   +1 more source

Hopping‐Mediated Zero‐Bias Photocharge Retention in Solution‐Processed Van Der Waals Heterostructures

open access: yesAdvanced Functional Materials, EarlyView.
Liquid–liquid interface assembly enables the fabrication of solution‐processed MoS2 and WSe2 centimeter‐scale, nanometer‐thick type‐II heterostructures on paper. Interfacial charge separation and hopping‐limited recombination produce rectification and persistent photocharge retention at zero bias.
Aniello Pelella   +11 more
wiley   +1 more source

High sensitive methane sensor based on a photonic bandgap fiber

open access: yes
Monitoring methane (CH) concentration is essential in many industrial and environmental applications. Hollow-core photonic bandgap fibers (HC-PBF) have emerged as a promising technology in the field of gas sensing.
Cubillas, Ana M.   +5 more
core   +1 more source

Design and Implementation of Bandgap Reference Circuits

open access: yes, 2005
An important part in the design of analog integrated circuits is to create reference voltages and currents with well defined values. To accomplish this on-chip, so called bandgap reference circuits are commonly used.
Sanikommu, Ramanarayana Reddy
core   +2 more sources

Bioinspired Adaptive Sensors: A Review on Current Developments in Theory and Application

open access: yesAdvanced Materials, EarlyView.
This review comprehensively summarizes the recent progress in the design and fabrication of sensory‐adaptation‐inspired devices and highlights their valuable applications in electronic skin, wearable electronics, and machine vision. The existing challenges and future directions are addressed in aspects such as device performance optimization ...
Guodong Gong   +12 more
wiley   +1 more source

A sub 1V bandgap reference circuit [PDF]

open access: yes, 2006
This thesis proposes a novel technique for a low supply voltage temperature-independent reference voltage. With the scaling of supply voltages, the threshold voltages don’t scale proportionally and thus low supply reference circuits have replaced the ...
Digvadekar, Ashish
core   +1 more source

A novel high accuracy bandgap reference voltage source

open access: yes, 2017
Purpose This paper aims to design a new bandgap reference circuit with complementary metal–oxide–semiconductor (CMOS) technology. Design/methodology/approach Different from the conventional bandgap reference circuit with operational amplifiers, this ...
Songlin Wang   +5 more
core   +1 more source

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