Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Qingfa Peng"'
Autor:
Xiaofeng Wang, Chen Gaopan, Xiaozhu Xie, Zhang Yuliang, Qingfa Peng, Jiangyou Long, Guoshun Pan
Publikováno v:
Ceramics International. 47:23134-23143
Femtosecond (fs) lasers have been proved to be reliable tools for high-precision and high-quality micromachining of ceramic materials. Nevertheless, fs laser processing using a single-mode beam with a Gaussian intensity distribution is difficult to o
Publikováno v:
Ceramics International. 47:13322-13330
Silicon carbide (SiC) is one of the most promising third-generation semiconductor materials owing to its superior comprehensive performances. However, high-efficient polishing of the hard-to-process SiC substrate remains a challenge due to its high h
Publikováno v:
ACS biomaterials scienceengineering. 7(8)
Spider dragline silk is a remarkable fiber made by spiders from an aqueous solution of spidroins, and this feat is largely attributed to the tripartite domain architecture of the silk proteins leading to the hierarchical assembly at the nano- and mic
Autor:
Gaopan Chen, Qingfa Peng, Jiangyou Long, Haimei Luo, Yan Zhou, Xiaozhu Xie, Guoshun Pan, Xiaofeng Wang
Publikováno v:
ECS Journal of Solid State Science and Technology. 11:054005
We propose a strategy for GaN ultra-smooth manufacture by combing of femtosecond laser processing and chemical mechanical polishing. The optimized flat top beam is used to redistribute the laser fluence from Gaussian distribution to square, flat top
Autor:
Li Lu, Yaopeng Zhang, Qianqian Niu, Huili Shao, Huihui Zhang, Suna Fan, Qingfa Peng, Rongliang Wu, Benjamin S. Hsiao
Publikováno v:
ACS Nano. 12:11860-11870
In this study, nascent silk nanoribbons (SNRs) with an average thickness of 0.4 nm were extracted from natural silkworm silk by partially dissolving degummed silk (DS) in sodium hydroxide (NaOH)/urea solution at -12 °C. In this gentle treatment, the
Publikováno v:
Materials Science in Semiconductor Processing. 132:105926
A one-step, facile approach of femtosecond laser polishing for achieving fine surface in sliced SiC is reported. The effect of wavelength and pulse number on formation mechanism of surface morphology and composition are studied firstly. On the basis
Autor:
Jun Ma, Di Zhang, Shenmin Zhu, Yuning Ma, Dawei Wang, Yaopeng Zhang, Hui Pan, Xin Meng, Qingfa Peng
Publikováno v:
ACS applied materialsinterfaces. 10(12)
The miniaturization of portable electronic devices has fueled the development of microsupercapacitors that hold great potential to complement or even replace microbatteries and electrolytic capacitors. In spite of recent developments taking advantage
Publikováno v:
RSC Advances. 5:62936-62940
In this paper, the structures and properties of regenerated silk fibroin (RSF) aqueous solutions under shear were investigated by using a polarizing microscope, an optical shearing instrument, a rotational rheometer, a Raman spectrometer and a synchr
Publikováno v:
Journal of Visualized Experiments.
The protocol demonstrates a method for mimicking the spinning process of silkworm. In the native spinning process, the contracting spinning duct enables the silk proteins to be compact and ordered by shearing and elongation forces. Here, a biomimetic
Publikováno v:
International Journal of Biological Macromolecules. 66:319-324
Microfluidic chips with single channel were built to mimic the shear and elongation conditions in the spinning apparatus of spider and silkworm. Silk fibers dry-spun from regenerated silk fibroin (RSF) aqueous solution using the chip could be tougher