Ward P . Beyermann

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A high-temperature solution-phase hydrolysis approach has been developed for the synthesis of colloidal magnetite nanocrystals with well-controlled size and size distribution, high crystallinity, and high water solubility. The synthesis was accomplished by the hydrolysis and reduction of iron(III) cations in diethylene glycol with a rapidly injected(More)
Solvothermal reaction of a mixture of Sn, Mn, and Te at 200 degrees C using teta as the solvent yields a novel inorganic-organic hybrid solid [Mn(teta)(en)].[Mn(teta)][Mn(SnTe4)2.Mn(teta)] (teta=triethylenetetramine and en=ethylenediamine; 1), which has a homochiral single-stranded helical structure. The material is a semiconductor with a band gap of 0.88(More)
We use terahertz time domain spectroscopy (THz-TDS) to determine the complex frequency-dependent dielectric response of all four nucleotides at different dilute concentrations. In addition, the suspension model's ability to extract the dielectric response of just the nucleotide with the hydration shell epsilon(b) excluding the dielectric information(More)
In searching appropriate candidates of magnetic semiconductors compatible with mainstream Si technology for future spintronic devices, extensive attention has been focused on Mn-doped Ge magnetic semiconductors. Up to now, lack of reliable methods to obtain high-quality MnGe nanostructures with a desired shape and a good controllability has been a barrier(More)
Facile, cost-effective, and manufacturable techniques to create single-nanowire based devices with good electrical interconnects is demonstrated by combining template directed electrodeposition, magnetic assembly, and a post-annealing in a reducing environment. Nickel nanowires with a diameter of approximately 30 nm were electrodeposited from low-stress(More)
Related Articles Investigation of the origin of glassiness in La0.5Sr0.5CoO3 J. Appl. Phys. 113, 17E114 (2013) Stabilization of the in-plane vortex state in two-dimensional circular nanorings J. Appl. Phys. 113, 093901 (2013) Effect of longitudinal degree of freedom of magnetic moment in body-centered-cubic iron J. Appl. Phys. 113, 17E112 (2013) Magnetic(More)
Nanoscale objects that combine high luminescence output with a magnetic response may be useful for probing local environments or manipulating objects on small scales. Ideally, these two properties would not interfere with each other. In this paper, we show that a fluorescent polymer host material can be doped with high concentrations of 20-30 nm diameter(More)
semiconductor thin films Z. Yang, W. P. Beyermann, M. B. Katz, O. K. Ezekoye, Z. Zuo, Y. Pu, J. Shi, X. Q. Pan, and J. L. Liu Department of Electrical Engineering, Quantum Structures Laboratory, University of California, Riverside, California 92521, USA Department of Physics and Astronomy, University of California, Riverside, California 92521, USA(More)
ZnO grown by molecular beam epitaxy Zheng Zuo, Huimei Zhou, Mario J. Olmedo, Jieying Kong, Ward P. Beyermann, Jian-Guo Zheng, Yan Xin, and Jianlin Liu Quantum Structures Laboratory, Department of Electrical Engineering, University of California Riverside, Riverside, California 92521, USA Department of Physics and Astronomy, University of California(More)