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2010年11月30日

【期刊论文】Synergistic enhancement effect of magnetic nanoparticles on anticancer drug accumulation in cancer cells

王雪梅, Renyun Zhang, XuemeiWang, , ChunhuiWu, Min Song, Jingyuan Li, Gang Lv, Jian Zhou, Chen Chen, Yongyuan Dai, Feng Gao, Degang Fu, Xiaomao Li, Zhiqun Guan and Baoan Chen

Nanotechnology 17(2006)3622-3626,-0001,():

-1年11月30日

摘要

Three kinds of magnetic nanoparticle, tetraheptylammonium capped nanoparticles of Fe3O4, Fe2O3 and Ni have been synthesized, and the synergistic effect of these nanoparticles on the drug accumulation of the anticancer drug daunorubicin in leukaemia cells has been explored. Our observations indicate that the enhancement effect of Fe3O4 nanoparticles is much stronger than that of Fe2O3 and Ni nanoparticles, suggesting that nanoparticle surface chemistry and size as well as the unique properties of the magnetic nanoparticles themselves may contribute to the synergistic enhanced effect of the drug uptake of targeted cancer cells.

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2010年11月30日

【期刊论文】Spectroscopic Study of the Interaction between New Fluorescent Dyes with Nucleic Acids

王雪梅, Xue Mei WANG*, Lin Tao CAI

Chinese Chemical Letters Vol. 10, No.12, pp. 1045-1048, 1999,-0001,():

-1年11月30日

摘要

A series of new dansylamide derivatives have been synthesized and the specific binding affinity of such fluorophores to nucleic acids has been investigated by using absorption, circular dichroism (CD), fluorescence and atomic force microscopy (AFM). The results indicate that the positive charge of the ligand and the π-π stacking between the dansyl part of the ligand and the DNA base pair may play an important role when binding to polynucleotides.

Spectroscopic study,, fluorophors,, complexation,, nucleic acids.,

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2010年11月30日

【期刊论文】Probing photoinduced electron transfer reactions by in situ electrochemical contact angle measurements

王雪梅, Xuemei Wang, Shiri Zeevi, Andrei B. Kharitonov, Eugenii Katz and Itamar Willner*

Phys. Chem. Chem. Phys., 2003, 5, 4236-4241,-0001,():

-1年11月30日

摘要

In situ electrochemical static contact angle measurements are employed to probe photoinduced electron transfer processes at electrode surfaces. Photosystems consisting of tris(2,20-bipyridyl)ruthenium(II), (Ru(bpy)32+), N,N0-dimethyl-4,40-bipyridinium (MV2+), Na2EDTA or CdS nanoparticles, MV2+, triethanolamine (TEOA) were included in aqueous droplets that were coupled with a ferrocene monolayer-functionalized electrode. Upon the oxidation of the interface (0.5 V vs. Ag quasi-reference electrode), and the illumination of the systems, photoinduced electron transfer to the modified electrode proceeds. The electron transfer processes yield photocurrents, and the photoelectrochemical transformations are followed by contact angle measurements. Similarly, a CdS/bipyridinium monolayer is assembled on an Au electrode support. The redox transformations of the bipyridinium units control the hydrophilic/hydrophobic properties of the interface, and are followed by contact angle analyses. Irradiation of the CdS/bipyridinium layer associated with the electrode biased at -0.3 V yields a photocurrent. The changes in the wetting properties of the irradiated interface are investigated by contact angle measurements.

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2010年11月30日

【期刊论文】Potential-induced switching of electrical contact by controlling droplet shapes at hydrophilic/hydrophobic interfaces

王雪梅, Xuemei Wang, Eugenii Katz, Itamar Willner*

Electrochemistry Communications 5(2003)814-818,-0001,():

-1年11月30日

摘要

Asymmetrical deformation of an aqueous electrolyte droplet bridging two bipyridinium-modified Au-electrodes is achieved upon the application of voltages resulting in the selective reduction and oxidation of the bipyridinium units on the two electrodes. The different contact angles at the right and left sides of the droplet originate from the electrochemically controlled changes of the wetting properties of the modified electrodes. The reversible and repeatable formation of an electrolytic contact between a side Ptwire electrode and the respective bottom Au-electrode is controlled by the voltage applied between the two bottom Au-electrodes.

Contact angle, Bipyridinium electrochemistry, Electrochemical switch, Monolayer, Modified electrode

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2010年11月30日

【期刊论文】Potential-controlled molecular machinery of bipyridinium monolayer-functionalized surfaces: an electrochemical and contact angle analysis?

王雪梅, Xuemei Wang, Andrei B. Kharitonov, Eugenii Katz and Itamar Willner*

CHEM. COMMUN., 2003, 1542-1543,-0001,():

-1年11月30日

摘要

A non-dense long-chain tethered bipyridinium monolayer linked to an electrode support is reversibly retracted and attracted from and to the electrode respectively by the applied potential. The "molecular machinery" functions of the monolayer are probed by chronoamperometry and contact angle measurements.

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  • 王雪梅 邀请

    东南大学,江苏

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