排序方式: 共有64条查询结果,搜索用时 31 毫秒
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Romy Ettlinger Dr. Natalia Moreno Prof. Dr. Dirk Volkmer Dr. Kornelius Kerl Dr. Hana Bunzen 《Chemistry (Weinheim an der Bergstrasse, Germany)》2019,25(57):13189-13196
Previous results revealed that arsenic trioxide might be used as promising therapeutic agent for the treatment of some solid tumours as atypical teratoid rhabdoid tumours (ATRT). However, in order to become an approved drug for solid tumour treatment, the active formulation has to get more efficient and feasible—but at the same time less toxic. One of the possibilities to achieve this dichotomy is to use nanomedicine tools. Herein, we report on the Zn-based metal–organic framework ZIF-8 (Zeolitic Imidazolate Framework-8) which turned out to be a promising candidate for the delivery of AsIII species. It conjointly features a high drug loading capacity and a prominent pH-triggered release behaviour. AsIII-loaded ZIF-8 nanoparticles coated and non-coated with polyethylene glycol were studied by XRPD, IR, Raman, TGA, TEM, EDX, CHN-elemental analysis, sorption analysis and ICP-OES, and their cytotoxicity was evaluated in vitro. 相似文献
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Sarah Salloum Dr. Georg Bendt Dr. Markus Heidelmann Dr. Kateryna Loza Samaneh Bayesteh M. Sepideh Izadi Patrick Kawulok Dr. Ran He Dr. Heike Schlörb Dr. Nicolas Perez Dr. Heiko Reith Prof. Dr. Kornelius Nielsch Prof. Dr. Gabi Schierning Prof. Dr. Stephan Schulz 《ChemistryOpen》2021,10(2):189-198
The synthesis of phase-pure ternary solutions of tetradymite-type materials (BixSb1−x)2Te3 (x=0.25; 0.50; 0.75) in an ionic liquid approach has been carried out. The nanoparticles are characterized by means of energy-dispersive X-ray spectroscopy (EDX), powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), and transmission electron microscopy. In addition, the role of different processing approaches on the thermoelectric properties - Seebeck coefficient as well as electrical and thermal conductivity - is demonstrated. 相似文献
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Lifeng Liu Ole Albrecht Eckhard Pippel Kornelius Nielsch Ulrich Gösele 《Electrochemistry communications》2010,12(6):835-838
A novel approach to the fabrication of ultrathin CoPt3 nanowires with a diameter of a few nanometers has been developed, by taking advantage of the volume shrinkage and formation of nanoporous structures upon dealloying electrodeposited Co99Pt1 nanowires (28 nm in diameter), followed by an ultrasonication treatment. The as-produced ultrathin CoPt3 nanowires have an average diameter of 5 nm and lengths of up to 10 μm, and are found to be ferromagnetic at room temperature. 相似文献
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O. Rabin K. Nielsch M.S. Dresselhaus 《Applied Physics A: Materials Science & Processing》2006,82(3):471-474
Anti-dot array thin films of bismuth were prepared by the e-beam deposition of this semi-metal on nano-porous substrates.
The magneto-resistance measurements of bismuth thin films deposited under identical conditions on various substrates displayed
signatures from both classical magneto-resistance and weak anti-localization effects. The relative intensity of the two effects
could be altered by the choice of the substrate, with the anti-dot array morphology suppressing the classical magneto-resistance,
and enhancing the weak anti-localization contribution to the measured magneto-resistance. As a result, the weak anti-localization
effect can be traced to higher magnetic field strengths and higher temperatures than is possible in non-patterned films, improving
the accuracy of the parameters extracted from the data.
PACS 73.20.Fz; 73.23-b; 73.61.At 相似文献
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The magnetization reversal behavior of Permalloy nanowires has been investigated using a magneto-optic Kerr effect setup. Nanowires with various widths, w=250 nm to 3 μm and a thickness of t=10 nm were fabricated by electron-beam lithography and subsequent lift-off. Furthermore, similar nanowires but with a thickness gradient along the nanowire axis have been prepared to investigate the influence of the gradient on the magnetic domain wall propagation. Magnetization hysteresis loops recorded on individual nanowires without a gradient are compared to corresponding wires with a thickness gradient. The dependence of the coercive field, Hc vs. t/w shows a linear behavior for wires without a gradient. However, wires with a gradient display a more complex crossover behavior. We find a plateau in the Hc vs. t/w curve at values of w, where a transformation from transverse to vortex domain wall type is expected. 相似文献
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Wang ZK Kuok MH Ng SC Lockwood DJ Cottam MG Nielsch K Wehrspohn RB Gösele U 《Physical review letters》2002,89(2):027201
The dynamical properties of uniform two-dimensional arrays of nickel nanowires have been investigated by inelastic light scattering. Multiple spin waves are observed that are in accordance with dipole-exchange theory predictions for the quantization of bulk spin waves. This first study of the spin-wave dynamics in ferromagnetic nanowire arrays reveals strong mode quantization effects and indications of a subtle magnetic interplay between nanowires. The results show that it is important to take proper account of these effects for the fundamental physics and future technological developments of magnetic nanowires. 相似文献