排序方式: 共有52条查询结果,搜索用时 0 毫秒
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Alexopoulos T Allen C Anderson EW Areti H Banerjee S Beery PD Biswas NN Bujak A Carmony DD Carter T Cole P Choi Y De Bonte RJ Erwin AR Findeisen C Goshaw AT Gutay LJ Hirsch AS Hojvat C Kenney VP Lindsey CS LoSecco JM McMahon T McManus AP Morgan N Nelson KS Oh SH Piekarz J Porile NT Reeves D Scharenberg RP Stampke SR Stringfellow BC Thompson MA Turkot F Walker WD Wang CH Wesson DK 《Physical review letters》1990,64(9):991-994
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Lazarus EA Navratil GA Greenfield CM Strait EJ Austin ME Burrell KH Casper TA Baker DR DeBoo JC Doyle EJ Durst R Ferron JR Forest CB Gohil P Groebner RJ Heidbrink WW Hong R Houlberg WA Howald AW Hsieh C Hyatt AW Jackson GL Kim J Lao LL Lasnier CJ Leonard AW Lohr J La Haye RJ Maingi R Miller RL Murakami M Osborne TH Perkins LJ Petty CC Rettig CL Rhodes TL Rice BW Sabbagh SA Schissel DP Scoville JT Snider RT Staebler GM Stallard BW Stambaugh RD St John HE Stockdale RE Taylor PL Thomas DM 《Physical review letters》1996,77(13):2714-2717
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Wallraff A Schuster DI Blais A Gambetta JM Schreier J Frunzio L Devoret MH Girvin SM Schoelkopf RJ 《Physical review letters》2007,99(5):050501
Sideband transitions are spectroscopically probed in a system consisting of a Cooper pair box strongly but nonresonantly coupled to a superconducting transmission line resonator. When the Cooper pair box is operated at the optimal charge bias point, the symmetry of the Hamiltonian requires a two-photon process to access sidebands. The observed large dispersive ac-Stark shifts in the sideband transitions induced by the strong nonresonant drives agree well with our theoretical predictions. Sideband transitions are important in realizing qubit-photon and qubit-qubit entanglement in the circuit quantum electrodynamics architecture for quantum information processing. 相似文献
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Cathy J. Ridgway Joachim Schoelkopf Patrick A. C. Gane 《Transport in Porous Media》2011,86(3):945-964
Fine calcium carbonate is frequently used as coating pigment, e.g. in paints, paper and board. Emulsion polymer latex provides
a typical binder incorporated in such coatings. Exposure of the resulting porous structure to liquid, depending on latex concentration
level, results in ab- and adsorption as the liquid is drawn into the structure by capillarity and the nature of the relative
surface chemistry of the pores. Previous work has shown that typical coating structures act to separate oil components according
to their surface energy characteristics and solubility index in respect to pigment surface and intra-latex diffusion. This
study considers water and alkane (hexadecane) as model liquids. Absorption rate into compressed tablets of ground calcium
carbonate is observed with and without the presence of latex. Polyacrylate dispersant used in manufacture renders the pigment
surface both hydrophilic and hygroscopic and, therefore, controls the differential dynamic wetting characteristics of the
porous structure for either polar or non-polar liquid. In competition with hexadecane saturating the pore structure of a latex-free
sample, polar water is seen to displace the non-polar liquid instantaneously, causing disintegration of the packed porous
structure. In the presence of latex binder, however, the structurally destructive pressure this creates is contained, and
retardation of the polar water is observed. The required pre-wetting action of water vapour diffusion on the polyacrylate
pigment surface is considered to be an integral part of the successful competition between oil and water in the offset printing
process, as non-polar oil absorbs steadily into a water pre-saturated structure. 相似文献
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Wallqvist V Claesson PM Swerin A Schoelkopf J Gane PA 《Langmuir : the ACS journal of surfaces and colloids》2007,23(8):4248-4256
Colloidal wood resin components present in pulp are collectively called "pitch". The presence of pitch may cause severe problems due to deposits in and on the paper machine. There is thus a need for controlling pitch aggregation and adsorption. To be able to develop more efficient pitch control systems, one needs to develop the understanding of pitch-pitch interactions and of the interactions between pitch and other materials. With this general goal in mind, we present methods for preparing geometrically well-defined pitch particles attached to atomic force microscopy tips. This has enabled us to investigate the interactions between pitch and talc, an additive commonly used for pitch control. We have used model pitch particles consisting of one component only (abietic acid), a mixture of components (collophonium), and particles prepared from real pitch deposits. We show that the forces acting between pitch and talc are attractive and, once the initial approach is made, exert this attraction out to large distances of separation. We present evidence that the formation of bridging air bubbles or cavities is responsible for this interaction. 相似文献
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Hansson PM Skedung L Claesson PM Swerin A Schoelkopf J Gane PA Rutland MW Thormann E 《Langmuir : the ACS journal of surfaces and colloids》2011,27(13):8153-8159
A range of surfaces coated with spherical silica particles, covering the size range from nanometer to micrometer, have been produced using Langmuir-Blodgett (LB) deposition. The particles were characterized both in suspension and in the Langmuir trough to optimize the surface preparation procedure. By limiting the particle aggregation and surface layer failures during the preparation steps, well-defined monolayers with a close-packed structure have been obtained for all particle sizes. Thus, this procedure led to structured surfaces with a characteristic variation in the amplitude and spatial roughness parameters. In order to obtain robust surfaces, a sintering protocol and an AFM-based wear test to determine the stability of the deposited surface layer were employed. Hydrophobization of the LB films followed by water contact angle measurements showed, for all tested particle sizes, the same increase in contact angle compared to the contact angle of a flat hydrophobic surface. This indicates nearly hexagonal packing and gives evidence for nearly complete surface wetting of the surface features. 相似文献