AlInP photodiode x-ray detectors

Zhao, Shifan; Butera, S.; Lioliou, G.; Krysa, A. B.; Barnett, A. M.

doi:10.1088/1361-6463/ab0d65

Cited by 10 publications

(12 citation statements)

References 36 publications

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“…In extremely low frequency magnetic field range (below 3 kHz), magnetostriction, piezoelectric, and magnetoelectric coupling coefficients play prominent roles in energy conversion between magnetic and electric domains . For example, magnetostrictive energy harvesters utilizing Villari‐effect convert ambient vibrations into oscillating magnetic fields which induces electromagnetic fields) into a surrounding coil . A typical magnetoelastic harvester consists of a magnetostrictive rod and a coil surrounding it .…”

Section: Introductionmentioning

confidence: 99%

“…Villari-effect convert ambient vibrations into oscillating magnetic fields which induces electromagnetic fields) into a surrounding coil. [10,14] A typical magnetoelastic harvester consists of a magnetostrictive rod and a coil surrounding it. [15,16] A magnetoelectric unimorph harvester on the other hand consists of a composite beam comprising of a magnetostrictive layer and a piezoelectric layer.…”

mentioning

confidence: 99%

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Large Power Amplification in Magneto‐Mechano‐Electric Harvesters through Distributed Forcing

Sriramdas

Kang

Miao

et al. 2020

Advanced Energy Materials

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Energy harvesting from extremely low frequency magnetic fields using magneto‐mechano‐electric (MME) harvesters enables wireless power transfer for operating Internet of Things (IoT) devices. The MME harvesters are designed to resonate at a fixed frequency by absorbing AC magnetic fields through a composite cantilever comprising of piezoelectric and magnetostrictive materials, and a permanent magnetic tip mass. However, this harvester architecture limits power generation because volume of the magnetic end mass is closely coupled with the resonance frequency of the device structure. Here, a method is demonstrated for maintaining the resonance frequency of the MME harvesters under all operating conditions (e.g., 60 Hz, standard frequency of electricity in many countries) while simultaneously enhancing the output power generation. By distributing the magnetic mass over the beam, the output power of the harvester is significantly enhanced at a constant resonance frequency. The MME harvester with distributed forcing shows 280% improvement in the power generation compared with a traditional architecture. The generated power is shown to be sufficient to power eight different onboard sensors with wireless data transmission integrated on a drone. These results demonstrate the promise of MME energy harvesters for powering wireless communication and IoT sensors.

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Large Power Amplification in Magneto‐Mechano‐Electric Harvesters through Distributed Forcing

Sriramdas

Kang

Miao

et al. 2020

Advanced Energy Materials

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“…Nevertheless, the strength of the IPN hydrogel was still much higher than that of the semi-IPN throughout the cyclic runs, which may too be due to the dynamically and rapidly breaking and re-forming of the Ca 2+ -crosslinked SA network. [18,53,54]…”

Section: Resultsmentioning

confidence: 99%

Mechanical Strengths of Hydrogels of Poly(N,N‐Dimethylacrylamide)/Alginate with IPN and of Poly(N,N‐Dimethylacrylamide)/Chitosan with Semi‐IPN Microstructures

Bai

Huang

Xiao

et al. 2019

Macro Materials & Eng

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Tough hydrogels receive continuous attention because of their promising applications in many fields. Herein, tough hydrogels of poly (N,N‐dimethylacrylamide) (PDMAA)/alginate (SA) are prepared, with interpenetrating network (IPN) and of PDMAA/chitosan (CS) with semi‐IPN microstructure, respectively. The toughening of the hydrogel by incorporating natural polymers is studied by compressing tests and dynamic mechanical analyses. Moreover, cyclic load–unload compressing of the two types of hydrogels are performed at low strains and under relatively high strains, in order to compare their strength and anti‐fatigue properties. The results indicate that the mechanical strength can be markedly improved upon addition of the natural polymers, and the IPN hydrogel of PDMAA/SA reveals much higher mechanical performances but is less stable. However, the semi‐IPN hydrogel of PDMAA/CS displays excellent anti‐fatigue stability, but with relatively low strength. Swelling tests, scanning electron microscopy, and Fourier transform infrared spectroscopy are carried out to study the microstructures of the hydrogels, which are carefully analyzed to understand the difference in mechanical performances of those hydrogels. The results suggest that the presence of sacrificial unit and higher chain density in the IPN are helpful for toughening hydrogels, while the semi‐IPN network is beneficial to improve the energy dissipation efficiency.

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“…For physical gels, stress relaxes through breaking and reforming of physical bonds. [52,53] The data on the stress relaxa-tion at different temperatures were fitted using the Kohlrausch's stretched exponential relaxation model (Equation 3) [54,55]…”

Section: Wwwadvancedsciencenewscom Wwwmcp-journaldementioning

confidence: 99%

Activation Energy for Dissociation of Hydrogen‐Bonding Crosslinkers in Phase‐Change Salogels: Dynamic Light Scattering versus Rheological Studies

Karimineghlani

Sukhishvili

2019

Macro Chemistry & Physics

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Dissociation energy of dynamic bonds in thermoresponsive phase‐change salogels is explored using rheology and dynamic light scattering (DLS). The salogels are formed by polyvinyl alcohol (PVA) reversibly crosslinked by hydrogen‐bonding amine‐terminated molecules in an inorganic phase‐change material—lithium nitrate trihydrate (LNH) salt—as a solvent. The crosslinker geometry (linear vs branched) has a strong effect on both the gelation temperature (Tgel) and the crosslinker to polymer ratio at which the gelation occurs. Due to their higher functionality, dendritic crosslinkers are more efficient gelators as compared to their linear counterparts, inducing PVA gelation at a lower concentration of a crosslinker and resulting in salogels with higher Tgel. Both stress relaxation and DLS data can be fitted by the exponential functions with temperature‐independent exponents of ≈0.5 and 2, respectively. For the first time, it is reported that the crosslinker dissociation activation energy determined from the rheological stress relaxation time and DLS slow mode decay time are in very good agreement, comprising ≈130–140 kJ mol−1 for salogels with both linear and dendritic crosslinkers.

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AlInP photodiode x-ray detectors

Cited by 10 publications

References 36 publications

Large Power Amplification in Magneto‐Mechano‐Electric Harvesters through Distributed Forcing

Large Power Amplification in Magneto‐Mechano‐Electric Harvesters through Distributed Forcing

Mechanical Strengths of Hydrogels of Poly(N,N‐Dimethylacrylamide)/Alginate with IPN and of Poly(N,N‐Dimethylacrylamide)/Chitosan with Semi‐IPN Microstructures

Activation Energy for Dissociation of Hydrogen‐Bonding Crosslinkers in Phase‐Change Salogels: Dynamic Light Scattering versus Rheological Studies

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