Results 91 to 100 of about 79,065 (292)

Temperature-frequency scaling in amorphous niobium-silicon near the metal-insulator transition

, 1998
Millimeter-wave transmission measurements have been performed in amorphous niobium-silicon alloy samples where the DC conductivity follows the critical temperature dependence $\sigma_{dc} \propto T^{1/2}$. The real part of the conductivity is obtained at
Baxter, David V., Carini, John P., Gruner, George, Lee, Hok-Ling   +3 more
core   +1 more source

4D Printing of Self‐Immolative Polymers

Advanced Functional Materials, EarlyView.
The integration of self‐immolative polymers (SIPs) into light‐based 3D printed structures is presented as a new “living” 4D printing strategy. By exploiting their metastability and stimuli‐responsiveness, SIP‐containing printed objects can undergo rapid and triggered degrowth under ambient conditions and subsequent regrowth through polymer ...
Johannes Markhart, Philipp Mainik, Pia S. Klee, Eva Blasco   +3 more
wiley   +1 more source

Impact of Lattice Heterogeneity on Broadband Optical Retardation in Stacked 2D Perovskite Single Crystals

Advanced Functional Materials, EarlyView.
It is shown that interfaces between organic and inorganic layers govern long‐range stacking disorder and in‐plane anisotropy in 2D metal‐halide perovskites. By comparing single‐cation AB‐AB and ordered mixed‐cation ABCD‐ABCD stackings, SCXRD reveals enhanced mosaicity, while optics confirm high birefringence.
Yixuan Dou, Nicholas Nici, Sunhao Liu, Xiaoming Wang, Yanfa Yan, Carla Slebodnick, Lina Quan   +6 more
wiley   +1 more source

Superconducting properties of niobium after electron beam welding

Physical Review Special Topics. Accelerators and Beams, 2011
One of the major criteria for designing superconducting niobium resonant cavities is to minimize the peak surface electric and magnetic fields to maximize the achievable accelerating electric gradient.
Prakash N. Potukuchi, L. S. Sharath Chandra, M. K. Chattopadhyay, D. Kanjilal, Amit Roy, S. B. Roy   +5 more
doaj   +1 more source

Electron–Matter Interactions During Electron Beam Nanopatterning

Advanced Functional Materials, EarlyView.
This article reviews the electron–matter interactions important to nanopatterning with electron beam lithography (EBL). Electron–matter interactions, including secondary electron generation routes, polymer radiolysis, and electron beam induced charging, are discussed.
Camila Faccini de Lima, Prathiba Thamizhavel, Taylor J. Woehl   +2 more
wiley   +1 more source

SI‐bioATRP in Mesoporous Silica for Size‐Exclusion Driven Local Polymer Placement

Advanced Functional Materials, EarlyView.
An enzyme‐catalyzed surface‐initiated atom transfer radical polymerization (SI‐bioATRP) of an anionic monomer within mesoporous silica particles, using hemoglobin as a catalyst, allows for controlling the location of the formed polymer via size‐exclusion effects between the nanopores and the biomacromolecules, thereby opening routes to functional ...
Oleksandr Wondra, Eleonora Ornati, Robert Lehn, Joanna J. Mikolei, Hergen Breitzke, Raheleh Pardehkhorram, Gerd Buntkowsky, Nico Bruns, Annette Andrieu‐Brunsen   +8 more
wiley   +1 more source

Evaluation of niobium as candidate electrode material for dc high voltage photoelectron guns

Physical Review Special Topics. Accelerators and Beams, 2012
The field emission characteristics of niobium electrodes were compared to those of stainless steel electrodes using a DC high voltage field emission test apparatus.
M. BastaniNejad, Md. Abdullah Mohamed, A. A. Elmustafa, P. Adderley, J. Clark, S. Covert, J. Hansknecht, C. Hernandez-Garcia, M. Poelker, R. Mammei, K. Surles-Law, P. Williams   +11 more
doaj   +1 more source

Astrocyte‐Guided Maturation of Neural Constructs in a Modular Biosynthetic Hydrogel for Biohybrid Neurotechnologies

Advanced Functional Materials, EarlyView.
A modular biosynthetic PVA–gelatin hydrogel crosslinked via visible‐light thiol‐ene chemistry is engineered as a coating for neural electrodes. Optimizing matrix composition and mechanical properties enables the hydrogel to support astrocytic populations that guide neural differentiation and functional maturation.
Martina Genta, Sofia Peressotti, Roberto Portillo‐Lara, Josef Goding, Rylie Green   +4 more
wiley   +1 more source

Systematic improvements in transmon qubit coherence enabled by niobium surface encapsulation

npj Quantum Information
We present a transmon qubit fabrication technique that yields systematic improvements in T 1 relaxation times. We encapsulate the surface of niobium and prevent the formation of its lossy surface oxide.
Mustafa Bal, Akshay A. Murthy, Shaojiang Zhu, Francesco Crisa, Xinyuan You, Ziwen Huang, Tanay Roy, Jaeyel Lee, David van Zanten, Roman Pilipenko, Ivan Nekrashevich, Andrei Lunin, Daniel Bafia, Yulia Krasnikova, Cameron J. Kopas, Ella O. Lachman, Duncan Miller, Josh Y. Mutus, Matthew J. Reagor, Hilal Cansizoglu, Jayss Marshall, David P. Pappas, Kim Vu, Kameshwar Yadavalli, Jin-Su Oh, Lin Zhou, Matthew J. Kramer, Florent Lecocq, Dominic P. Goronzy, Carlos G. Torres-Castanedo, P. Graham Pritchard, Vinayak P. Dravid, James M. Rondinelli, Michael J. Bedzyk, Mark C. Hersam, John Zasadzinski, Jens Koch, James A. Sauls, Alexander Romanenko, Anna Grassellino   +39 more
doaj   +1 more source

Kapitza resistance cooling of single crystal (111) niobium for superconducting rf cavities

Physical Review Special Topics. Accelerators and Beams, 2010
The use of large grains or single crystal niobium to improve the Q factor of superconducting rf cavities for particle accelerators, is presently under study.
Jay Amrit, Claire Z. Antoine
doaj   +1 more source