05.04.2013 | Kanghyun Kim, Haeyong Kang, Cho Yeon Lee, and Wan Soo Yun, Journal of Vacuum Science & Technology B, 2013

This study shows that a minimal introduction of structural defects to graphene can greatly enhance its sensitivity to molecular gas adsorption. The electrical conductance of graphene is enhanced by several orders of magnitude after defect generation by exposure to Ar plasma for just a few ...

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05.04.2013 | Po-Hsun Huang, Han-Ming Chen, Tzu-Chien Huang, Sen-Yeu Yang, and Yi-Ting Sun, Journal of Vacuum Science & Technology B, 2013

Air bubble defects have been regarded as a critical problem in ultraviolet (UV)-based imprinting/embossing processes, especially in large area fabrication. This paper reports a gas-assisted UV embossing process for bubble-free replication of large area microstructures. This gas-assisted ...

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05.04.2013 | Supriya S. Kanyal, David S. Jensen, Andrew J. Miles, Andrew E. Dadson, Michael A. Vail et al., Journal of Vacuum Science & Technology B, 2013

The effects of iron catalyst thickness on the fabrication and performance of microfabricated, binder-free, carbon nanotube (CNT)-templated, thin layer chromatography (TLC) plates are demonstrated. The iron catalyst was deposited at thicknesses ranging from 4 to 18 nm in increments of 2 nm. ...

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04.04.2013 | Ankita Verma, Joshah Jennings, Ryan D. Johnson, Marc H. Weber, and Kelvin G. Lynn, Journal of Vacuum Science & Technology B, 2013

Positrons are charged antiparticles that annihilate upon contact with electrons or any form of matter. Two of the authors (Lynn and Weber) have proposed a new approach to store large numbers of charged particles such as positrons. The proposed structure consists of thousands of ...

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04.04.2013 | Dae-Seon Kim, Sung-Hwa Eo, and Jae-Hyung Jang, Journal of Vacuum Science & Technology B, 2013

An antireflective subwavelength structure (SWS) was realized on the InGaP layer of a GaAs solar cell by using colloidal lithography followed by dry etching process. The fabricated SWS with an aspect ratio of 1.33 and a period of 300 nm showed enhanced optical properties and device ...

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04.04.2013 | Mohammad Abuwasib, Philip Krantz, and Per Delsing, Journal of Vacuum Science & Technology B, 2013

Proper grounding between different ground planes in coplanar superconducting qubit circuits is important to avoid spurious resonances which increase decoherence. Here, the authors present a possible solution to suppress such undesired modes using superconducting aluminum air-bridges which ...

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04.04.2013 | Chun-Chieh Chang, Dan Botez, Lei Wan, Paul F. Nealey, Steven Ruder et al., Journal of Vacuum Science & Technology B, 2013

Large-area, ultradense Ni nanopillar arrays were fabricated directly on bare n-GaAs substrates using diblock copolymer lithography and electrodeposition. The Ni nanopillar arrays are hexagonally arranged, exhibiting an average pillar diameter of ∼24 nm, and an areal density of ∼1011/cm2 over ...

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04.04.2013 | Kathleen M. Krause, Michael T. Taschuk, and Michael J. Brett, Journal of Vacuum Science & Technology B, 2013

Increasing the throughput of the powerful single-step glancing angle deposition (GLAD) method using a prototype simplified roll-to-roll (R2R) system has been explored. While the conventional GLAD technique is popular for fabricating nanostructured devices in a single deposition step, it is ...

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03.04.2013 | Yuyin Xi, Lu Liu, Ya-Hsi Hwang, Oluwadamilola Phillips, Fan Ren et al., Journal of Vacuum Science & Technology B, 2013

The hydrogen detection response time of Pt-gated diode sensors fabricated on AlGaN/GaN heterostructure as a function of the hydrogen concentration was investigated. A new method to extract the response time, taking the derivative of diode current, was proposed and shown to reduce the response ...

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03.04.2013 | Arezou Khoshakhlagh, Linda Hoglund, David Z. Ting, Cory J. Hill, Sam A. Keo et al., Journal of Vacuum Science & Technology B, 2013

The authors report on growth, material characterization, and device performance of infrared photodetectors based on type II InAs/GaSb superlattices using the complementary barrier infrared detector (CBIRD) design. In this paper, control steps for improvement of material quality in terms of ...

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