Results 201 to 210 of about 855,728 (251)

Fast crystal growth at ultra-low temperatures

Nature Materials, 2021
It is believed that the slow liquid diffusion and geometric frustration brought by a rapid, deep quench inhibit fast crystallization and promote vitrification. Here we report fast crystal growth in charged colloidal systems under deep supercooling, where liquid diffusion is extremely low.
Qiong Gao, Jingdong Ai, Shixiang Tang, Minhuan Li, Yanshuang Chen, Jiping Huang, Hua Tong, Lei Xu, Limei Xu, Hajime Tanaka, Peng Tan   +10 more
openaire   +2 more sources

An Ultra‐Low‐Temperature Alternating Current Filter

Small, 2023
AbstractTraditional alternating current filter based on aluminum electrolytic capacitors (AECs) suffer from abrupt drop of filtering capability at ultra‐low temperatures (≤−30 °C), which greatly hinders the reliable working of electronics at extremely cold conditions.
Chenguang Zhang, Xin Jiao, Yingyu Wang, Ke Ma, Yunlong Zhou, Yongchang Ma, Hua Wang   +6 more
openaire   +2 more sources

Ultra-low temperature MAS-DNP

Journal of Magnetic Resonance, 2016
Since the infancy of NMR spectroscopy, sensitivity and resolution have been the limiting factors of the technique. Regular essential developments on this front have led to the widely applicable, versatile, and powerful spectroscopy that we know today.
Lee, Daniel, Bouleau, Eric, Saint-Bonnet, Pierre, Hediger, Sabine, de Paepe, Gael   +4 more
openaire   +3 more sources

Ultra Low Temperature Ultra Low Power Instrument Packages for Planetary Surfaces

AIP Conference Proceedings, 2010
Achievement of solar system exploration roadmap goals will involve robotic or human deployment and longterm operation of surface science packages remote from human presence, thus requiring autonomous, self-powered operation. The major challenge such packages face will be operating during long periods of darkness in extreme cold potentially without the ...
P. E. Clark, P. S. Millar, B. Beaman, P. S. Yeh, L. Cooper, S. Feng, E. Young, Glen A. Robertson   +7 more
openaire   +1 more source

Optical interferometry at ultra low temperatures

Journal of Low Temperature Physics, 1995
We have developed optical, interferometric methods for investigations of interfaces at ultra low temperatures. In our scheme conventional optical windows are avoided: laser illumination (He-Ne) is guided into the cryostat via a single-mode optical fiber and images are taken using a CCD sensor mounted inside the 4-K vacuum can.
P. J. Hakonen, H. Alles, A. V. Babkin, J. P. Ruutu   +3 more
openaire   +1 more source

Ultra-low power CMOS cells for temperature sensors

Proceedings of the 18th annual symposium on Integrated circuits and system design - SBCCI '05, 2005
Temperature sensors and voltage references require cells that generate both PTAT (Proportional To Absolute Temperature) and NTC (Negative Temperature Coefficient) voltages. We present a novel theoretical approach based on a 'quasi-constant' current to obtain these voltages in standard CMOS technology using no resistors. A test circuit was fabricated in
Conrado Rossi, Pablo Aguirre
openaire   +1 more source

Ultra-low-power temperature compensated voltage reference generator

Microelectronics Journal, 2006
Abstract A CMOS voltage reference generator, based on the difference between the gate–source voltages of two NMOS transistors, has been implemented with AMS 0.35 μm CMOS technology ( V thn = 0.45 and V thp = 0.75 V at 0 °C).
G. DE VITA, IANNACCONE, GIUSEPPE
openaire   +2 more sources