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New leak elements for helium based on single-layer graphene composite membranes

期刊: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 2021; 39 (4)

Graphene containing intrinsic pores with molecular dimensions is a highly promising material for standard leak elements because of its minimal and sta......

Sb2Se3 solar cells fabricated via close-space sublimation

期刊: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 2021; 39 (5)

Antimony selenide (Sb2Se3) is regarded as an excellent photovoltaic absorber material due to its suitable bandgap, large light absorption coefficient,......

Selective volatile organic compound gas sensor based on carbon nanotubes functionalized with ZnO nanoparticles

期刊: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 2021; 39 (4)

This paper describes the theory and results for a new class of low-cost chemoresistive gas sensors designed for selective hydrocarbon gas detection. T......

Fast SARS-CoV-2 virus detection using disposable cartridge strips and a semiconductor-based biosensor platform

期刊: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 2021; 39 (3)

Detection of the SARS-CoV-2 spike protein and inactivated virus was achieved using disposable and biofunctionalized functional strips, which can be co......

Self-powered ultraviolet photodiode based on lateral polarity structure GaN films

期刊: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 2021; 39 (5)

In this work, we report on a self-powered ultraviolet photodiode realized using lateral polarity structure (LPS) GaN films. The opposite nature of the......

Stabilization of cold-field-emission current from a CeB6 single-crystal emitter by using a faceted (100) plane

期刊: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 2021; 39 (1)

A cerium hexaboride (CeB6) single crystal grown by the floating-zone method has a low work function of about 2.6 eV, and along with lanthanum hexabori......

Influence of primary electron incident angle and electron bombardment on the secondary electron yield of laser-treated copper

期刊: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 2021; 39 (3)

Electron cloud is a persistent problem in operating modern accelerators. It might be eliminated by reducing the secondary electron yield (SEY), which ......

Electronic structure and field emission characteristics of a new kind of BeO nanotubes: A first-principles study

期刊: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 2021; 39 (3)

First-principles calculations are used to investigate electronic and field emission characteristics of (5, 5) capped BeO nanotubes (BeONTs), which ind......

High sensitivity x-ray detectors based on 4H-SiC p-i-n structure with 80 mu m thick intrinsic layer

期刊: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 2021; 39 (2)

In this work, a large size x-ray detector with a 25 mm(2) active area is demonstrated based on a thick 4H-SiC p-i-n structure. The detector exhibits o......

Temperature dependence of the electrical characteristics of ZnO thin film transistor with high-k NbLaO gate dielectric

期刊: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 2021; 39 (1)

ZnO thin film transistor with high-k NbLaO/SiO2 bilayer gate dielectric was fabricated by sputtering, and the temperature dependence of the electrical......

Au-free low-temperature ohmic contacts for AlGaN/AlN/GaN heterostructures

期刊: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 2020; 38 (6)

Au-free, Ti/Al/Ta ohmic contact on the AlGaN/AlN/GaN heterostructure using low annealing temperature is studied in this paper. With SiCl(4)plasma trea......

Parylene micropillars coated with thermally grown SiO2

期刊: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 2020; 38 (6)

The modification of surface properties frequently requires the binding of suitable compounds to the original surface. Silanes or thiols can be directl......

Selective lateral photoelectrochemical wet etching of InGaN nanorods

期刊: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 2020; 38 (6)

Vertically aligned InGaN nanorods (NRs) sandwiched between GaN layers on sapphire substrates were synthesized by photoelectrochemical (PEC) wet etchin......

Phase errors reduction in multi-angle illumination digital holographic microscopy

期刊: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 2020; 38 (6)

Synthetic aperture has been a common method in digital holographic microscopy resolution enhancement over the years. Multiangle illumination is one ty......

Effects of cavity shapes and rounded corners of mold on polymer filling process in nanoimprint lithography

期刊: JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 2020; 38 (6)

The effects of cavity shapes and rounded corners on polymer filling and mold stress distributions of nanoimprint lithography are investigated using a ......

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