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排序方式: 共有133条查询结果,搜索用时 15 毫秒
1.
Alemayehu Nana Koya Joao Cunha Karina Andrea Guerrero-Becerra Denis Garoli Tao Wang Saulius Juodkazis Remo Proietti Zaccaria 《Advanced functional materials》2021,31(41):2103706
Extreme confinement of electromagnetic waves and mechanical displacement fields to nanometer dimensions through plasmonic nanostructures offers unprecedented opportunities for greatly enhanced interaction strength, increased bandwidth, lower power consumption, chip-scale fabrication, and efficient actuation of mechanical systems at the nanoscale. Conversely, coupling mechanical oscillators to plasmonic nanostructures introduces mechanical degrees of freedom to otherwise static plasmonic structures thus giving rise to the generation of extremely large resonance shifts even for minor position changes. This nanoscale marriage of plasmonics and mechanics has led to the emergence of a new field of study called plasmomechanics that explores the fundamental principles underneath the coupling between light and plasmomechanical nanoresonators. In this review, both the fundamental concepts and applications of plasmomechanics as an emerging field of study are discussed. After an overview of the basic principles of plasmomechanics, the active tuning mechanisms of plasmonic nano-mechanical systems are extensively analyzed. Moreover, the recent developments on the practical implications of plasmomechanic systems for such applications as biosensing and infrared detection are highlighted. Finally, an outlook on the implications of the plasmomechanical nanosystems for development of point-of-care diagnostic devices that can help early and rapid detection of fatal diseases are forwarded. 相似文献
2.
当今高层办公建筑挣脱了20世纪50~60年代“方盒子”的束缚,走向了丰富多变的平面及形体设计时期。转向关注节能设计、创造多元的人性化公共空间及舒适的办公环境,成为设计的目标。 相似文献
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Elisabetta Albi Giuseppina Perrella Andrea Lazzarini Samuela Cataldi Remo Lazzarini Alessandro Floridi Francesco Saverio Ambesi-Impiombato Francesco Curcio 《International journal of molecular sciences》2014,15(7):11555-11565
Proliferating thyroid cells are more sensitive to UV-C radiations than quiescent cells. The effect is mediated by nuclear phosphatidylcholine and sphingomyelin metabolism. It was demonstrated that proton beams arrest cell growth and stimulate apoptosis but until now there have been no indications in the literature about their possible mechanism of action. Here we studied the effect of protons on FRTL-5 cells in culture. We showed that proton beams stimulate slightly nuclear neutral sphingomyelinase activity and inhibit nuclear sphingomyelin-synthase activity in quiescent cells whereas stimulate strongly nuclear neutral sphingomyelinase activity and do not change nuclear sphingomyelin-synthase activity in proliferating cells. The study of neutral sphingomyelinase/sphingomyelin-synthase ratio, a marker of functional state of the cells, indicated that proton beams induce FRTL-5 cells in a proapoptotic state if the cells are quiescent and in an initial apoptotic state if the cells are proliferating. The changes of cell life are accompanied by a decrease of nuclear sphingomyelin and increase of bax protein. 相似文献
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Garry Kerch Franco Rustichelli Pamela Ausili Janis Zicans Remo Merijs Meri Aleksandr Glonin 《European Food Research and Technology》2008,226(6):1459-1464
The objective of this research was to investigate the effect of chitosan on the interaction of water with bread ingredients
and on the rate of staling. The changes in freezable bound water and total water contents in bread crumb were assessed by
differential scanning calorimetry from water melting and evaporation endothermic peak areas. It was found that freezable water
content and total water content in bread crumb decrease during staling more rapidly in the presence of chitosan. The weak
interaction of freezable water with protein and starch polymeric chains in bread crumb becomes stronger, but the interaction
of nonfreezable bound water with protein and starch molecules in bread crumb becomes weaker in the course of staling during
bread storage. Two stages of bread crumb staling were indicated. Chitosan increases the rate of bread staling during both
stages. It was suggested that during bread staling chitosan increases water migration rate from crumb to crust, prevents amylose-lipid
complexation, and increases dehydration rate both for starch and gluten. 相似文献
8.
S Sanguinetti M Padovani M Gurioli E Grilli M Guzzi A Vinattieri M Colocci P Frigeri S Franchi L Lazzarini G Salviati 《Thin solid films》2000,380(1-2):224-226
We investigated vertically aligned InAs/GaAs QD structures, grown by atomic layer molecular beam epitaxy, with a number N of layers and with spacer thicknesses d. QD alignment and structure quality were checked by transmission electron microscopy. The dependencies of carrier capture, decay dynamics and existence of quenching channels on the design parameters N and d were studied by time resolved photoluminescence (PL), PL excitation (PLE) and PL temperature-dependent measurements. Our results show that the carrier capture and the radiative efficiency of the QDs are negatively affected by increasing the number of QD layers and by reducing the spacer thicknesses; this effect is likely to be related to the increase of defect concentrations in GaAs spacers, due to relaxation of an increasingly large strain. 相似文献
9.
Plasmonic Nanostructures: 3D Nanostar Dimers with a Sub‐10‐nm Gap for Single‐/Few‐Molecule Surface‐Enhanced Raman Scattering (Adv. Mater. 15/2014) 下载免费PDF全文
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