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Showing 9985 to 9996 of 39390 entries
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Network synchronization, diffusion, and the paradox of heterogeneity.

Physical review. E, Statistical, nonlinear, and soft matter physics

Motter AE, Zhou C, Kurths J.
PMID: 15697667
Phys Rev E Stat Nonlin Soft Matter Phys. 2005 Jan;71(1):016116. doi: 10.1103/PhysRevE.71.016116. Epub 2005 Jan 12.

Many complex networks display strong heterogeneity in the degree (connectivity) distribution. Heterogeneity in the degree distribution often reduces the average distance between nodes but, paradoxically, may suppress synchronization in networks of oscillators coupled symmetrically with uniform coupling strength. Here...

Dimethyl methylphosphonate decomposition on Cu surfaces: supported Cu nanoclusters and films on TiO2(110).

Langmuir : the ACS journal of surfaces and colloids

Ma S, Zhou J, Kang YC, Reddic JE, Chen DA.
PMID: 15491203
Langmuir. 2004 Oct 26;20(22):9686-94. doi: 10.1021/la048594x.

The thermal decomposition of dimethyl methylphosphonate (DMMP), which is a simulant molecule for organophosphorus nerve agents, has been investigated on Cu clusters as well as on Cu films deposited on a TiO(2)(110) surface. Scanning tunneling microscopy studies were conducted...

Multigate single-photon detection and timing discrimination with an InGaAs/lnP avalanche photodiode.

Applied optics

Zhou C, Wu G, Zeng H.
PMID: 16572693
Appl Opt. 2006 Mar 10;45(8):1773-6. doi: 10.1364/ao.45.001773.

Multigate detection of single photons at 1550 nm is achieved by using capacitor-balanced InGaAs/InP avalanche photodiodes, with which we experimentally demonstrate the efficient discrimination of single-photon timing by counting single-photon clicks and the corresponding afterpulses within the multiple gates....

Hierarchical synchronization in complex networks with heterogeneous degrees.

Chaos (Woodbury, N.Y.)

Zhou C, Kurths J.
PMID: 16599770
Chaos. 2006 Mar;16(1):015104. doi: 10.1063/1.2150381.

We study synchronization behavior in networks of coupled chaotic oscillators with heterogeneous connection degrees. Our focus is on regimes away from the complete synchronization state, when the coupling is not strong enough, when the oscillators are under the influence...

Self-assembled structure in room-temperature ionic liquids.

Chemistry (Weinheim an der Bergstrasse, Germany)

Hao J, Song A, Wang J, Chen X, Zhuang W, Shi F, Zhou F, Liu W.
PMID: 15844134
Chemistry. 2005 Jun 20;11(13):3936-40. doi: 10.1002/chem.200401196.

Self-assembled vesicles, structurally equivalent to some hydrotropes, have been obtained from a Zn2+-fluorous surfactant or in the mixture of Zn2+-fluorous surfactant/zwitterionic surfactant in room-temperature ionic liquids (RTILs). The existence of bilayers arranged in vesicles in RTILs would be very...

Three-stage switching of surface wetting using phosphate-bearing polymer brushes.

Chemical communications (Cambridge, England)

Zhou F, Huck WT.
PMID: 16333507
Chem Commun (Camb). 2005 Dec 28;(48):5999-6001. doi: 10.1039/b512106j. Epub 2005 Nov 03.

Surface initiated polymer brushes containing phosphate side groups have been used to reversibly switch wettability and hydration between three different states.

Efficient C-C double-bond formation reaction via a new synthetic strategy: a self-sorting tandem reaction.

Organic letters

Yin G, Zhou B, Meng X, Wu A, Pan Y.
PMID: 16706497
Org Lett. 2006 May 25;8(11):2245-8. doi: 10.1021/ol060541e.

[reaction: see text] A novel and efficient carbon-carbon double-bond formation reaction via coupling of aryl or heteroaryl methyl ketones has been developed. A dimethyl sulfoxide-iodine-CuO system was proven to be efficient for this reaction and afforded the expected products...

A novel ultrasonic-assisted solution-phase approach for the fabrication of tellurium bundles of nanowhiskers.

Ultrasonics sonochemistry

Zhou B, Zhang JR, Zhao L, Zhu JM, Zhu JJ.
PMID: 16011906
Ultrason Sonochem. 2006 May;13(4):352-8. doi: 10.1016/j.ultsonch.2005.05.004. Epub 2005 Jul 11.

An ultrasonic-assisted solution-phase approach to tellurium bundles of nanowhiskers has been successfully established. It is a convenient and efficient process for the formation of Te nanowhiskers and their simultaneous assembly into tellurium bundles without using any templates. It was...

Probing the responsive behavior of polyelectrolyte brushes using electrochemical impedance spectroscopy.

Analytical chemistry

Zhou F, Hu H, Yu B, Osborne VL, Huck WT, Liu W.
PMID: 17194136
Anal Chem. 2007 Jan 01;79(1):176-82. doi: 10.1021/ac061332a.

Cyclic voltammetry and impedance spectroscopy were employed to probe the responsive properties of polyelectrolyte brushes. Poly[(dimethylamino)ethyl methacrylate] (PDMAEMA) brushes over 100 nm thick on gold substrates were synthesized via surface-initiated atom-transfer radical polymerization and quaternized with methane iodide to...

Dynamics and rheology of immiscible polymer-liquid-crystal systems.

The Journal of chemical physics

Yu W, Zhou C.
PMID: 16035868
J Chem Phys. 2005 Jul 01;123(1):014906. doi: 10.1063/1.1940049.

The morphology evolution in immiscible polymer-liquid-crystal systems is quite different from flexible polymer-polymer mixtures due to the anisotropic properties of liquid crystals. The dynamics and rheology of such system are discussed. A theoretical model is proposed to describe the...

Solution for the nonuniformity correction of infrared focal plane arrays.

Applied optics

Zhou H, Liu S, Lai R, Wang D, Cheng Y.
PMID: 15929279
Appl Opt. 2005 May 20;44(15):2928-32. doi: 10.1364/ao.44.002928.

Based on the S-curve model of the detector response of infrared focal plan arrays (IRFPAs), an improved two-point correction algorithm is presented. The algorithm first transforms the nonlinear image data into linear data and then uses the normal two-point...

Splitting of femtosecond laser pulses by using a Dammann grating and compensation gratings.

Journal of the Optical Society of America. A, Optics, image science, and vision

Li G, Zhou C, Dai E.
PMID: 15839285
J Opt Soc Am A Opt Image Sci Vis. 2005 Apr;22(4):767-72. doi: 10.1364/josaa.22.000767.

When a Dammann grating is used to split a beam of femtosecond laser pulses into multiple equal-intensity beams, chromatic dispersion will occur in beams of each order of diffraction and with different scale of angular dispersion because the incident...

Showing 9985 to 9996 of 39390 entries