Improvement of extraction efficiency for GaN-based light emitting diodes

A simple, low cost method for mass production to enhance the light extraction efficiency of GaN-related LEDs was proposed. With appropriate process parameters, the nature lithography of nanosphere can be used to fabricate two-dimensional nanostructures, including the nanomesh ZnO layer, photonic crystal (PhC) patterned p-GaN, and patterned sapphire substrates. Based on preliminary results, the extraction efficiencies of LEDs with these nanostructures can thus be improved and the nature lithography is demons...     

聚丙烯/凹凸棒土复合材料的制备与性能研究

以聚丙烯(PP)为基体,凹凸棒土(AT)为无机粒子填充剂,通过熔融共混的方法制备PP/AT复合材料,探讨了AT对PP/AT复合材料的热行为、机械性能及流动性能的影响.结果表明:AT能起到一定增强的效果,当AT的含量为2 wt.%时,PP/AT复合材料的抗拉强度可达到35.5MPa,但其冲击强度随AT含量的增加而呈现阶梯...     

PICKLING TIME AND ELECTRODIALYSIS AFFECTS FUNCTIONAL PROPERTIES OF SALTED DUCK EGG WHITE

Salted duck egg was prepared by coating fresh duck egg with laterite and sodium chloride. The effects of different lengths of pickling time and electrodialysis desalination on foaming, emulsifying and gelation properties of salted duck egg white (SDEW) were investigated. The pH was decreased from 9.3 to 7.1, zeta potential was decreased from -48.3 to -26.4 (mV), NaCl content increased from 0.49% to 7.32% and surface hydrophobicity increased from 177 to 372 (So/100 mg protein) after pickling for 8 weeks. After electrodialysis desalination treatment, the pH of SDEW was slightly increased and zeta potential was decreased; however, the NaCl content was reduced by 95% and surface hydrophobicity decreased by 30as, the SDS-PAGE pattern showed the same distribution of protein molecules. Electrodialysis desalination treatment did not affect emulsifying properties. The foamability and foam stability of SDEW decreased with increasing pickling time, but increased with electrodialysis desalination treatment. The gel strength of SDEW decreased with pickling time, but decreased sharply after electrodialysis desalination treatment.     

Alignment with sub‐pixel accuracy for images of multi‐modality microscopes using automatic calibration

A biological specimen is often imaged with various imaging modalities, and it is crucial that such images are well aligned to best reveal physiological structures and functions of the specimen for in‐depth analyses. In this paper, we present a methodology for automatic calibration of multiple optical imaging modalities within the x–y detector plane using a custom chrome‐on‐glass target and an automatic and accurate registration algorithm. The target contains lines crossing at random angles, and our method of registration is based on the alignment of salient features extracted from the lines within the individual images. Once spatial relationships are found between the various detectors and applied to the resultant images, no further registration is required for all static samples, and the registered images serve as the starting point for registration of dynamic samples, where the remaining misalignment is caused by sample movement. We have validated our algorithm with 40 inter‐modal and 30 intra‐modal image pairs, and the success rates are 95 and 100%, respectively, with sub‐pixel accuracy. This methodology is widely applicable to any multi‐modal microscope that combines a number of imaging modalities on a common platform assuming images of the target can be obtained.