Results 251 to 260 of about 300,543 (295)

Hard Materials with Tunable Porosity

MRS Bulletin, 2009
AbstractPorous metals and ceramic materials are of critical importance in catalysis, sensing, and adsorption technologies and exhibit unusual mechanical, magnetic, electrical, and optical properties compared to nonporous bulk materials. Materials with nanoscale porosity often are formed through molecular self-assembly processes that lock in a ...
Jonah Erlebacher, Ram Seshadri
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Tunable transducers as smart materials

TRANSDUCERS '91: 1991 International Conference on Solid-State Sensors and Actuators. Digest of Technical Papers, 2002
A solid-state tunable transducer has been developed by incorporating an elastically nonlinear material, silicone rubber, into an electroacoustic transducer made from piezoelectric ceramics. The resonant frequency and mechanical Q of the transducer are tuned mechanically by applying a uniaxial compressive stress to the composite.
M. Blaszkiewicz, R.E. Newnham, Q.C. Xu
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Tunable SiN Hybrid Conjugated Materials

Organometallics, 2019
We report the synthesis of a family of N-aryl cyclosilazanes. The reaction of 1,2-bis(trifluoromethanesulfonate)tetramethyldisilane with para-substituted anilines gives six-membered rings with no observed condensation polymerization. X-ray crystallography reveals the cyclosilazane adopts a twist boat conformation with both nitrogens in a trigonal ...
Carlton P. Folster, Phi N. Nguyen, Maxime A. Siegler, Rebekka S. Klausen   +3 more
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Tunable Aeroelasticity With Self-Tunable Composite Materials

AIAA SCITECH 2024 Forum
This paper reports the dynamic performance of novel aerospace structures with embedded multiphase materials with tunable stiffness and damping parameters. The proposed structures embedded multiphase materials exploit the thermal loads generated in high-speed fights to tune the stiffness and damping parameters, and thus, enable adaptive aeroelastic ...
Flint, Spencer J., Boom, Bart, Masmeijer, Thijs, Habtour, Ed, Maio, Dario Di   +4 more
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Biomimetic photonic materials with tunable structural colors

Journal of Colloid and Interface Science, 2013
Nature is a huge gallery of art involving nearly perfect structures and forms over the millions of years developing. Inspiration from natural structures exhibiting structural colors is first discussed. We give some examples of natural one-, two-, and three-dimensional photonic structures.
Jun, Xu, Zhiguang, Guo
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Mesoporous materials: tunable structure, morphology and composition

Chemical Communications, 2009
Mesoporous materials with controlled composition and pore characteristics have been extensively investigated during recent decades. The design, synthesis and assembly of building blocks with suitable shapes, length scales and functionalities have led to advances in the control of pore structure and morphology, the tailoring of pore surface chemistry ...
Zhenglong, Yang, Yunfeng, Lu, Zhenzhong, Yang   +2 more
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Nanocomposites as Tunable Optical Materials

2021
In the previous chapter, I have shown that nanocomposites can be used as bulk optical materials. However, this is only possible in the homogeneous regime, which, for applications in the visible spectral range, is reached for particle sizes below 4 nm. The main degrees of freedom that remain available for the design of optical nanocomposites are hence ...
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Two-Component Dendritic Gels:  Easily Tunable Materials

Journal of the American Chemical Society, 2003
This paper reports the tunability of a two-component gel system based on dendritic l-lysine with a focal point carboxylic acid group and aliphatic diamines. The microscopic structure and macroscopic properties of the gel can be modulated by changing the concentration of the components, altering their molecular structures, or tuning their relative molar
Andrew R, Hirst, David K, Smith, Martin C, Feiters, Huub P M, Geurts, Andrew C, Wright   +4 more
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Evaluation of materials for tunable vibronic lasers

Applied Optics, 1988
A comparison is made of the use of three techniques for determining the effects of stimulated emission on the spectra of solid-statevibronic laser materials: peak single-pass gain, fluorescence band narrowing, and lifetime shortening. Each of these was used to obtain the pump energy density and population inversion at threshold, the stimulated emission
M L, Kliewer, A, Suchocki, R C, Powell
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Tunable materials switching with light

Science, 2016
Materials Science Composite materials incorporate weak, stretchy, energy-absorbing materials between sheets of strong, brittle ones. Adaptive materials can locally repair or tune themselves in response to an external stimulus such as light. Zhu et al. combined these ideas into a nacre-mimetic nanocomposite built from a nanoclay, a polymer, and a small ...
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