A Te-free binary phase change material Sb Bi is proposed as a new inorganic photoresist for heat-mode lithography. It shows good film-forming ability(surface roughness <1 nm), low threshold power for crystallizatio...A Te-free binary phase change material Sb Bi is proposed as a new inorganic photoresist for heat-mode lithography. It shows good film-forming ability(surface roughness <1 nm), low threshold power for crystallization(2 m W), and high etching selectivity(15:1). Line-type, dot-type, and complex pattern structures with the smallest feature size of 275 nm are fabricated on Sb Bi thin films using a 405 nm diode laser direct writing system. In addition, the excellent grating structures with a period of 0.8 μm demonstrate that thermal interference does not affect the adjacent microstructures obviously. These results indicate that Sb Bi is a promising laser heat-mode resist material for micro/nanostructure fabrication.展开更多
目的探讨大黄游离蒽醌(free anthraquinone from rhubarb,FAR)对糖尿病大鼠心肌CTGF和collagen表达及间质纤维化的影响。方法健康♂SD大鼠一次性腹腔注射STZ制备糖尿病大鼠模型,2周后随机分为模型对照组(DCM组)和大黄游离蒽醌干预组(FAR...目的探讨大黄游离蒽醌(free anthraquinone from rhubarb,FAR)对糖尿病大鼠心肌CTGF和collagen表达及间质纤维化的影响。方法健康♂SD大鼠一次性腹腔注射STZ制备糖尿病大鼠模型,2周后随机分为模型对照组(DCM组)和大黄游离蒽醌干预组(FAR组),同时设立正常对照组(CON组);干预8周后检测大鼠空腹血糖;心脏质量指数;Masson染色观察心肌纤维化程度;RT-PCR法检测CTGF、procollagenⅠ和collagenⅢmRNA表达;免疫组化法检测CTGF蛋白含量;ELISA法检测collagenⅠ和collagenⅢ胶原含量。结果与CON组相比,DCM组大鼠空腹血糖、心脏质量指数、心肌纤维化程度以及CTGF、collagen I和collagenⅢ表达均明显升高;与DCM相比,FAR组心脏质量指数、心肌纤维化程度以及CTGF、collagenⅠ和collagenⅢ表达均明显下降。结论大黄游离蒽醌可通过调低糖尿病大鼠心肌组织CTGF的表达,减少心肌间质中collagen I和Ⅲ合成及沉积。展开更多
Manipulating the self-assembly of transition metal telluride nanocrystals(NCs) creates opportunities for exploring new properties and device applications. Iron ditelluride(FeTe2) has recently emerged as a new class of...Manipulating the self-assembly of transition metal telluride nanocrystals(NCs) creates opportunities for exploring new properties and device applications. Iron ditelluride(FeTe2) has recently emerged as a new class of magnetic semiconductor with three-dimensional(3D) magnetic ordering and narrow band gap structure, yet the self-assembly of FeTe2 NCs has not been achieved. Herein, the tree-like FeTe2 nanoarchitectures with orthorhombic crystal structure have been successfully synthesized by hot-injection solvent thermal approach using phosphine-free Te precursor. The morphology, size, and crystal structure have been investigated using transmission electron microscopy(TEM), high-resolution TEM(HRTEM),and powder x-ray diffraction(XRD). We study the formation process of tree-like FeTe2 NCs according to trace the change of the sample morphology with the reaction time. It was found that the FeTe2 nanoparticles show oriented aggregation and self-assembly behavior with the increase of reaction time, which is attributed to size-dependent magnetism properties of the samples. The magnetic interaction is thought to be the driving force of nanoparticle self-organization.展开更多
基金partially supported by the National Natural Science Foundation of China(Nos.51672292and 61627826)the International Science&Technology Cooperation Program of China:Intergovernmental International Cooperation Program in Science and Technology Innovation(No.2016YFE0110600)the International Science&Technology Cooperation Program of Shanghai(No.16520710500)
文摘A Te-free binary phase change material Sb Bi is proposed as a new inorganic photoresist for heat-mode lithography. It shows good film-forming ability(surface roughness <1 nm), low threshold power for crystallization(2 m W), and high etching selectivity(15:1). Line-type, dot-type, and complex pattern structures with the smallest feature size of 275 nm are fabricated on Sb Bi thin films using a 405 nm diode laser direct writing system. In addition, the excellent grating structures with a period of 0.8 μm demonstrate that thermal interference does not affect the adjacent microstructures obviously. These results indicate that Sb Bi is a promising laser heat-mode resist material for micro/nanostructure fabrication.
基金Project supported by the National Natural Science Foundation of China(Grant No.11874027)the China Postdoctoral Science Foundation(Grant Nos.2019T120233 and 2017M621198)
文摘Manipulating the self-assembly of transition metal telluride nanocrystals(NCs) creates opportunities for exploring new properties and device applications. Iron ditelluride(FeTe2) has recently emerged as a new class of magnetic semiconductor with three-dimensional(3D) magnetic ordering and narrow band gap structure, yet the self-assembly of FeTe2 NCs has not been achieved. Herein, the tree-like FeTe2 nanoarchitectures with orthorhombic crystal structure have been successfully synthesized by hot-injection solvent thermal approach using phosphine-free Te precursor. The morphology, size, and crystal structure have been investigated using transmission electron microscopy(TEM), high-resolution TEM(HRTEM),and powder x-ray diffraction(XRD). We study the formation process of tree-like FeTe2 NCs according to trace the change of the sample morphology with the reaction time. It was found that the FeTe2 nanoparticles show oriented aggregation and self-assembly behavior with the increase of reaction time, which is attributed to size-dependent magnetism properties of the samples. The magnetic interaction is thought to be the driving force of nanoparticle self-organization.
