A stretchable and screen-printable conductive ink for stretchable electronics
Stretchable electronics can offer an added degree of design freedom and generate products with unprecedented capabilities. Stretchableconductive ink serving as interconnect, is a key enabler for stretchable electronics. This paper focuses on the development of a stretchable and screen printableconductive ink which could be stretched more than 500 cycles at 20% strain while maintaining electrical and mechanical integrity. The screen printable and stretchableconductive ink developed in this paper marks an important milestone for this nascent technology. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 3, 2016 Category: Physics Authors: Anwar Mohammed and Michael Pecht Source Type: research
Polarization- and frequency-tunable microwave circuit for selective excitation of nitrogen-vacancy spins in diamond
We report on a planarmicrowave resonator providing arbitrarily polarized oscillatingmagnetic fields that enable selective excitation of the electronic spins of nitrogen-vacancy centers indiamond. Thepolarization plane is parallel to the surface ofdiamond, which makes the resonator fully compatible with (111)-orienteddiamond. The field distribution is spatially uniform in a circular area with a diameter of 4 mm, and a near-perfect circularpolarization is achieved. We also demonstrate that the originalresonance frequency of 2.8 GHz can be varied in the range of 2 –3.2 GHz by introducing varactor diodes that serve as v...
Source: Applied Physics Letters - November 3, 2016 Category: Physics Authors: Johannes Herrmann, Marc A. Appleton, Kento Sasaki, Yasuaki Monnai, Tokuyuki Teraji, Kohei M. Itoh and Eisuke Abe Source Type: research
Acoustic charge transport induced by the surface acoustic wave in chemical doped graphene
A graphene/LiNbO3 hybrid device is used to investigate the acoustic induced charge transport in chemicaldopedgraphene. The chemicaldoping ofgraphene via its physisorption of gas molecules affects thesurface acoustic wave(SAW)charge carrier transport in a manner different from electric field drift. That transport inducesdoping dependent macroscopicacoustoelectriccurrent. The chemicaldoping can manipulate majority carriers and induces uniqueacoustoelectric features. The observation is explained by a classical relaxation model. Eventually the device based onacoustoelectriccurrent is proved to outperform the common chemiresist...
Source: Applied Physics Letters - November 3, 2016 Category: Physics Authors: Shijun Zheng, Hao Zhang, Zhihong Feng, Yuanyuan Yu, Rui Zhang, Chongling Sun, Jing Liu, Xuexin Duan, Wei Pang and Daihua Zhang Source Type: research
Photoacoustic ultrasound sources from diffusion-limited aggregates
Metallic diffusion-limited aggregate (DLA)films are well-known to exhibit near-perfect broadband optical absorption. We demonstrate that suchfilms also manifest a substantial and relatively material-independent photoacoustic response, as a consequence of their randomnanostructure. We theoretically and experimentally analyze the photoacoustic phenomena in DLAfilms and show that they can be used to create broadband air-coupled acoustic sources. These sources are inexpensive and simple to fabricate and work into the ultrasonic regime. We illustrate the device possibilities by building and testing an optically addressed acoust...
Source: Applied Physics Letters - November 3, 2016 Category: Physics Authors: Krutik Patel, Morgan Brubaker, Alexander Kotlerman, Robert Salazar, Eli Wolf and David M. Weld Source Type: research
Angle-resolved photoemission with circularly polarized light in the nodal mirror plane of underdoped Bi2Sr2CaCu2O8+ δ superconductor
Unraveling the nature ofpseudogap phase inhigh-temperature superconductors holds the key to understanding their superconducting mechanisms and potentially broadening their applications via enhancement of their superconducting transitiontemperatures. Angle-resolvedphotoemission spectroscopy (ARPES) experiments using circularly polarized light have been proposed to detect possible symmetry breaking state in thepseudogap phase of cuprates. The presence (absence) of an electronic order which breaksmirror symmetry of the crystal would in principle induce a finite (zero) circulardichroism inphotoemission. Different orders breaki...
Source: Applied Physics Letters - November 3, 2016 Category: Physics Authors: Junfeng He, Thomas R. Mion, Shang Gao, Gavin T. Myers, Masashi Arita, Kenya Shimada, G. D. Gu and Rui-Hua He Source Type: research
