Results 1 to 10 of about 142,226 (149)

Multi-scale characterisation of a ferroelectric polymer reveals the emergence of a morphological phase transition driven by temperature

open access: yesNature Communications, 2021
Ferroelectric polymeric materials possess intermixture of crystalline and amorphous regions with complex Curie transition. Here, the authors demonstrate that the semi-crystalline morphology of the ferroelectric copolymer of P(VDF-TrFE) strongly affects ...
Jonas Hafner   +12 more
doaj   +1 more source

Simplified Phenomenological Model for Ferroelectric Micro-Actuator

open access: yesMicromachines, 2023
As smart structures are becoming increasingly ubiquitous in our daily life, the need for efficient modeling electromechanical coupling devices is also rapidly advancing.
Binh Huy Nguyen   +3 more
doaj   +1 more source

An 8 bit current steering DAC for offset compensation purposes in sensor arrays [PDF]

open access: yesAdvances in Radio Science, 2012
An 8 bit segmented current steering DAC is presented for the compensation of mismatch of sensors with current output arranged in a large arrays. The DAC is implemented in a 1.8 V supply voltage 180 nm standard CMOS technology.
G. Bertotti   +6 more
doaj   +1 more source

Surface acoustic wave coupling between micromechanical resonators

open access: yesCommunications Physics, 2022
As the size of mechanical resonators is decreased, their resonance frequencies increase and acoustic wave-like propagation in their substrate becomes important.
Hendrik Kähler   +2 more
doaj   +1 more source

Ultrathin 2 nm gold as impedance-matched absorber for infrared light

open access: yesNature Communications, 2020
Long-term stability and broad spectral response are highly desired features of absorbers. Here, the authors report impedance matched absorbers based on 2 nm thick gold layer operating within the mid-infrared range from 2 to 20 μm, enabling stable long ...
Niklas Luhmann   +7 more
doaj   +1 more source

Temperature Cycled Operation and Multivariate Statistics for Electronic-Nose Applications Using Field Effect Transistors

open access: yesProceedings, 2020
Gas sensitive iridium-gated field effect transistors based on silicon carbide were used to study the response towards formaldehyde, ammonia, carbon monoxide and nitrogen dioxide at concentrations ranging from parts per million to parts per billion ...
Guillem Domènech-Gil   +3 more
doaj   +1 more source

Optical Angular Sensor for Space Applications

open access: yesSensors, 2021
This paper describes a silicon/glass sensing structure for axial angle measurements. The presented optical angular sensor can statically measure the angle φ of any apparatus depending on the torsion of the optical component against the sensor housing ...
Alexander Dabsch   +3 more
doaj   +1 more source

Nanostructural and piezoelectric characterization of electro-formed δ-phase poly(vinylidene fluoride) thin films

open access: yesMaterials Research Letters, 2023
Ferroelectric polymer PVDF possesses different polymorphs. Solution-processed thin films crystallize mostly into the paraelectric α-phase. From α-PVDF, the electroactive phases β-, γ-, δ-PVDF can be achieved by further treatments.
Davide Disnan   +6 more
doaj   +1 more source

Intermodal coupling spectroscopy of mechanical modes in microcantilevers

open access: yesBeilstein Journal of Nanotechnology, 2023
Atomic force microscopy (AFM) is highly regarded as a lens peering into the next discoveries of nanotechnology. Fundamental research in atomic interactions, molecular reactions, and biological cell behaviour are key focal points, demanding a continuous ...
Ioan Ignat   +5 more
doaj   +1 more source

Porous Silicon Carbide for MEMS

open access: yesProceedings, 2017
Metal assisted photochemical etching (MAPCE) of 4H Silicon Carbide (SiC) was utilized to generate locally defined porous areas on single crystalline substrates.
Markus Leitgeb   +4 more
doaj   +1 more source

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