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- 저자 : Qiyuan He (검색결과 3 건)
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He, Qiyuan,Sudibya, Herry Gunadi,Yin, Zongyou,Wu, Shixin,Li, Hai,Boey, Freddy,Huang, Wei,Chen, Peng,Zhang, Hua American Chemical Society 2010 ACS NANO Vol.4 No.6
<P>Recently, the field-effect transistors (FETs) with graphene as the conducting channels have been used as a promising chemical and biological sensors. However, the lack of low cost and reliable and large-scale preparation of graphene films limits their applications. In this contribution, we report the fabrication of centimeter-long, ultrathin (1−3 nm), and electrically continuous micropatterns of highly uniform parallel arrays of reduced graphene oxide (rGO) films on various substrates including the flexible polyethylene terephthalate (PET) films by using the micromolding in capillary method. Compared to other methods for the fabrication of graphene patterns, our method is fast, facile, and substrate independent. In addition, we demonstrate that the nanoelectronic FETs based on our rGO patterns are able to label-freely detect the hormonal catecholamine molecules and their dynamic secretion from living cells.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2010/ancac3.2010.4.issue-6/nn100780v/production/images/medium/nn-2010-00780v_0001.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn100780v'>ACS Electronic Supporting Info</A></P>
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Qiyuan He,Weidong Li,Min Wan,Cailing Li,Chao Cui 한국정밀공학회 2022 International Journal of Precision Engineering and Vol.23 No.6
Taking advantage of the high specific strength, structural efficiency, and rigidity of spherical multi-intersecting high-stiffened integral panels, they have been used on a manned space station as the main load-bearing structure. Due to their large size and complex structure, a new incremental die forming approach was proposed, where the panel is pressed by a relatively small die at devised positions multiple times in proper order. However, the springback behavior of the panel after each depression is extremely complicated due to the interactions between multi-intersecting ribs. In this paper, a numerical approach of springback prediction for a typical intersecting stiffened panel in spherical die forming was proposed and the corresponding algorithm was developed. The approach quantifi es the influence between multi-intersecting ribs by a novel defi nition of a bending neutral layer on the panel: the 3-D springback of whole panel is equivalent to the 2-D springback of the ribs. The strain component led by skin deformation and its elastic release are considered. A plasticity model with a nonlinear strain hardening of material was adopted. The approach was employed to predict the springback of panels with different forming radii, different rib sizes, and local large-rigidity structures. A rapid springback compensation based on the approach was achieved. The calculated results are in strong agreement with the results of FEM simulations based on ABAQUS software and experiments, accurately predicting profiles error within 2 mm.
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Lin He,Qiyuan Deng 국제구조공학회 2023 Structural Engineering and Mechanics, An Int'l Jou Vol.86 No.2
The textile industry has benefited from nanotechnology in various fields of application as the use of nanomaterials, and nanotechnology is multiplying. Nanoparticles can increase the performance of textiles by up to 100 times when used in finishing, coating, and dyeing techniques, providing them with capabilities they did not previously possess. Nanotechnology is used in the textile chemical industry to produce sports mats with stain resistance, flame resistance, wrinkle resistance, moisture management, antimicrobial quality, and UV protection. The incorporation of nanomaterials into fabrics can have a significant effect on their properties, including shrinkage, strength, electrical conductivity, and flammability. Various inventions and innovations may result from nano-processed textiles in the future, thus leading to the advancement of science. This article presents the construction of sports engineering structures with high resistance to improve the quality of sports training. The mechanical properties of sports mats are improved with the help of nanotechnology. Strength, elasticity, and tear resistance are among these properties. This method enables the production of elastic, durable, and tear-resistant sports mats.
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