نتایج جستجو برای: sapphire wafer
تعداد نتایج: 28205 فیلتر نتایج به سال:
Bandgap engineering and quantum confinement in semiconductor heterostructures provide the means to fine-tune material response electromagnetic fields light a wide range of spectrum. Nonetheless, forming on lattice-mismatched substrates has been challenge for several decades, leading restrictions device integration lack efficient devices important wavelength bands. Here, we show that van der Waa...
We describe epitaxial methods for two different semipolar GaN orientations on patterned sapphire substrates: With (101̄2) (r-plane) sapphire substrates we achieve planar (112̄2) GaN layers with smooth surfaces on a large scale. In the case of (112̄3) (n-plane) patterned wafers the growth of (101̄1) GaN is possible. We optimized the growth conditions for (112̄2) GaN (especially the growth temperature...
Infrared-visible sum frequency generation spectroscopy (SFG) was used to measure the interfacial concentrations of poly(methyl methacrylate) (PMMA)/polystyrene (PS) blends next to a sapphire substrate. The acid-base interactions of carbonyl groups of PMMA with the hydroxyl groups on the sapphire drive the interfacial segregation of PMMA next to the sapphire substrate. Using the shift of sapphir...
Background and purpose: Fasciola hepatica and Fasciola gigantica are common liver flukes that are the etiological agents of fasciolosis, which affects both domestic livestock and humans worldwide. In the present study we established a rapid, easy and also accurate tool, for differentiation between F. hepatica and F. gigantica using Fast PCR. Material and methods: Thirty adults of Fasciola spec...
We have used spectroscopic ellipsometry to measure the optical functions of F16CuPc ~copper-hexadecafluoro-phthalocyanine, C32F16N8Cu) films grown by organic molecular beam deposition simultaneously onto MgO~001!, SiO2 /Si, and A-plane (112̄0) sapphire substrates. The latter allows one to produce, under suitable conditions, highly ordered films with interesting anisotropic optical properties. Th...
We report fluorescence imaging of single dye molecules on a glass substrate by two-photon excitation with femtosecond pulses from a mode-locked Ti:sapphire laser. The single-molecule images exhibit a high signal to background ratio (>30:1) and a high spatial resolution (fwhm < /3). A quadratic intensity dependence of single-molecule emission rate is experimentally verified, and single-molecule ...
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