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Wave-Vector and Temperature-Dependent Electron Transport in a magnetic nanostructure Modulated by Bias

Communications in Theoretical Physics 2010年第8期54卷 365-368页

作者：卢建夺李云宝王玉华侯阳来 Department of Applied Physics Wuhan University of Science and Technology Hubei Province Key Laboratory of Systems Science in Metallurgical Process Wuhan University of Science and Technology

We theoretically investigate the wave-vector and temperature-dependent electron transport in a magneticnanostructure modulated by an applied *** large spin-polarization can be achieved in such a device,and the degreeof spin-polarization strongly depends on the transverse wave-vector and the *** interesting propertiesmay be helpful to spin-polarize electrons into semiconductors,and this device may be used as a spin filter.

关键词： magnetic nanostructure spin-polarization spin filtering

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Electronic Resonant Splitting in a nanostructure with Periodic magnetic-Electric Barriers

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Communications in Theoretical Physics 2008年第3期49卷 783-785页

作者： LU Jian-Duo Department of Applied Physics Wuhan University of Science and Technology Wuhan 430081 China

In this letter, the transmission probability and the conductance of the ballistic electron are studied in a nanostructure with the periodic magnetic-electric barriers. We find that the resonant splitting increases with the number of periods increasing, so the number of the resonant peaks increases and the peaks become sharper. For the m-th periodic magnetic-electric barriers tunneling the splitting is （m - 1）-fold.

关键词： magnetic nanostructure resonant splitting magnetic-electronic barriers

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The electron transport characters in a nanostructure with the periodic magnetic-electric barriers

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Chinese Physics B 2007年第10期16卷 3080-3086页

作者：卢建夺邵亮侯阳来戴厚梅 Department of Applied Physics Wuhan University of Science and Technology Wuhan 430081 China

This paper detailedly studies the transmission probability, the spin polarization and the conductance of the ballistic electron in a nanostrueture with the periodic magnetic-electric barriers These observable quantities are found to be strongly dependent not only on the magnetic configuration, the incident electron energy and the incident wave vector, but also on the number of the periodic magnetic-electric barriers The transmission coefficient and the spin polarization show a periodic pattern with the increase of the separation between two adjacent magnetic fields, and the resonance splitting increases as the number of periods increases. Surprisingly, it is found that a polarization can be achieved by spin-dependent resonant tunnelling in this structure, although the average magnetic field of the structure is zero.

关键词： magnetic nanostructure spin polarization resonance splitting wave-vector filtering

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Integrin-targeting with peptide-bioconjugated semiconductor-magnetic nanocrystalline heterostructures

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Nano Research 2016年第3期9卷 644-662页

作者： Gianpiero Valente Nicoletta Depalo Ivan de Paola Rosa Maria lacobazzi Nunzio Denora Valentino Laquintana Roberto Comparelli Emiliano Altamura Tiziana Latronico Michele Altomare Elisabetta Fanizza Marinella Striccoli Angela Agostiano Michele Saviano Annarita Del Gatto Laura Zaccaro Maria Lucia Curri Universita degli Studi di Bari Aldo Moro Dipartimento di Chimica Via Orabona 4 70125 - Bari Italy Istituto per i Processi Chimico-Fisici-CNR UOS Bari Via Orabona 4 70125 - Bari Italy Istituto di Biostrutture e Bioimmagini-CNR Via Mezzocannone 16 80134 - Napoli Italy Universita degli Studi di Bari Aldo Moro Dipartimento di Farmacia - Scienze del Farmaco Via Orabona 4 70125 - Bari Italy Universita degli Studi di BariAIdo Moro Dipartimento di Bioscienze Biotecnologie e Biofarmaceutica Via Orabona 4 70125 - Bari Italy lstituto di Cristallografia-CNR Via Amendola 122/0 70126 Bari Italy

Binary asymmetric nanocrystals （BNCs）, composed of a photoactive TiO2 nanorod joined with a superparamagnetic γ-Fe203 spherical domain, were embedded in polyethylene glycol modified phospholipid micelle and successfully bioconjugated to a suitably designed peptide containing an RGD motif. BNCs represent a relevant multifunctional nanomaterial, owing to the coexistence of two distinct domains in one particle, characterized by high photoactivity and magnetic properties, that is particularly suited for use as a phototherapy and hyperthermia agent as well as a magnetic probe in biological imaging. We selected the RGD motif in order to target integrin expressed on activated endothelial cells and several types of cancer cells. The prepared RGD-peptide/BNC conjugates, comprehensively monitored by using complementary optical and structural techniques, demon- strated a high stability and uniform dispersibility in biological media. The cytotoxicity of the RGD-peptide/BNC conjugates was studied in vitro. The cellular uptake of RGD-peptide conjugates in the cells, assessed by means of two distinct approaches, namely confocal microscopy analysis and emission spectroscopy determination in cell lysates, displayed selectivity of the RGD-peptide-BNC conjugate for the cw]33 integrin. These RGD-peptide-BNC conjugates have a high potential for theranostic treatment of cancer.

关键词： nanocrystallineheterostructures photoactive semiconductor magnetic nanostructure cyclic RGD peptide αvβ3 integrin active targeting

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Giant magnetoresistance in a two-dimensional electron gas modulated by ferromagnetic and Schottky metal stripes

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Journal of Semiconductors 2012年第7期33卷 51-55页

作者：卢建夺徐宾 Hubei Province Key Laboratory of Systems Science in Metallurgical Process Wuhan University of Science and Technology Department of Mathematics and Information Sciences North China Institute of Water Conservancy and Hydroelectric Power

In this paper, by using the transfer matrix method, we theoretically investigate the magnetoresistance （MR） effect in a two-dimensional electron gas （2DEG） modulated by two Schottky metal （SM） stripes and two ferromagnetic （FM） stripes on the top and bottom of the 2DEG. From the numerical results, we find that a considerable MR effect can be achieved in this device due to the significant difference between electron transmissions through the parallel and antiparallel magnetization configurations. We also find that the MR ratio obviously depends on the magnetic strength and the electric-barrier height as well as the distance between the FM and SM stripes. These characters are very helpful for making the new type of MR devices according to their practical applications.

关键词： magnetic nanostructure magnetoresistance effect magnetoresistance ratio

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