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| 1 | Heavy metal sources and associated risk in response to agricultural intensification in the estuarine sediments of Chaohu Lake Valley, East China显示文摘 | Wenzhong Tang Baoqing Shan Hong Zhang Zhanpo Mao | 2009 | Journal of Hazardous Materials2009，，1： | 2 |
| 2 | Flexible Large-Area Graphene Films of 50-600 nm Thickness with High Carrier Mobility显示文摘Bulk graphene nanofilms feature fast electronic and phonon transport in combination with strong light-matter interaction and thus have great potential for versatile applications,spanning from photonic,electronic,and optoelectronic devices to charge-stripping and electromagnetic shielding,etc.However,large-area flexible close-stacked graphene nanofilms with a wide thickness range have yet to be reported.Here,we report a polyacrylonitrile-assisted’substrate replacement’strategy to fabricate large-area free-standing graphene oxide/polyacrylonitrile nanofilms(lateral size~20 cm).Linear polyacrylonitrile chains-derived nanochannels promote the escape of gases and enable macro-assembled graphene nanofilms(nMAGs)of 50-600 nm thickness following heat treatment at 3,000℃.The uniform nMAGs exhibit 802-1,540 cm^(2)V-1s-1carrier mobility,4.3-4.7 ps carrier lifetime,and>1,581 W m^(-1)K^(-1)thermal conductivity(n MAG-assembled 10μm-thick films,mMAGs).nMAGs are highly flexible and show no structure damage even after 1.0×10^(5)cycles of folding-unfolding.Furthermore,n MAGs broaden the detection region of graphene/silicon heterojunction from near-infrared to mid-infrared and demonstrate higher absolute electromagnetic interference(EMI)shielding effectiveness than state-of-the-art EMI materials of the same thickness.These results are expected to lead to the broad applications of such bulk nanofilms,especially as micro/nanoelectronic and optoelectronic platforms. | Shiyu Luo Li Peng Yangsu Xie Xiaoxue Cao Xiao Wang Xiaoting Liu Tingting Chen Zhanpo Han Peidong Fan Haiyan Sun Ying Shen Fan Guo Yuxing Xia Kaiwen Li Xin Ming Chao Gao | 2023 | Nano-Micro Letters2023，15，5： | 1 |
| 3 | Electrospinning of Neat Graphene Nanofbers显示文摘Macroscopic assembly of graphene sheets has renovated the preparation of neat carbonaceous fbers with integrating high performance and superior functionalities,beyond the pyrolysis of conventional polymeric precursors.To date,graphene microfbers by the liquid crystalline wet-spinning method have been established.However,how to reliably prepare continuous neat graphene nanofbers remains unknown.Here,we present the electrospinning of neat graphene nanofbers enabled by modulating colossally extensional fow state of graphene oxide liquid crystals.We use polymer with mega molecular weight as transient additives to realize the colossal extensional fow and electrospinning.The neat graphene nanofbers feature high electronic quality and crystallinity and exhibit high electrical conductivity of 2.02×10^(6) S/m that is to be comparable with single crystal graphite whisker.The electrospinning of graphene nanofbers was extended to prepare large-area fabric with high fexibility and superior specifc electrical/thermal conductivities.The electrospinning of graphene nanofbers opens the door to nanofbers of rich two-dimensional sheets and the neat graphene nanofbers may grow to be a new species after conventional carbonaceous nanofbers and whiskers in broad functional applications. | Zhanpo Han Jiaqing Wang Senping Liu Qinghua Zhang Yingjun Liu Yeqiang Tan Shiyu Luo Fan Guo Jingyu Ma Peng Li Xin Ming Chao Gao Zhen Xu | 2022 | Advanced Fiber Materials2022，4，2： | 1 |
| 4 | Density Structure and Seismicity in Beijing-Tianjin-Tangshan Area显示文摘By analyzing the gravity,magnetic,seismic and drilling data,the authors in this paper calculate and construct the density structure of the crust and upper mantle along the Haoding-Chengde and Zhangjiakou-Tanggu profiles and residual gravity anomalies in the region.The compiled residual gravity anomalies g2 and g4 maps reflect qualitatively the spatial distribution of the density structure of the crustal 'seismogenic layer' and the uppermost mantle layer at depth of 50-75 km in the region.In order to reveal the relationship between density structure and seismicity,a great number of statistic calculations and comparisons of the available data and the results indicate that the seismicity in the crustal 'seismogenic layer' is characterized by block movement:moderate-small earthquakes occurred generally within the blocks,moderate-strong earthquakes mostly along the borders of the blocks,strong earthquakes mostly at the edges and corners of the blocks.And aftershocks of strong earthquakes tended to occur at | Yin Xiuhua,Liu Zhanpo and Liu TieshengInstitute of Geology,SSB,Beijing 100029,China | 1994 | Earthquake Research in China1994，8，2： | 0 |
| 5 | Wrinkling modes of graphene oxide assembled on curved surfaces显示文摘Assembling two-dimensional(2D)sheets into macroscopic three-dimensional(3D)forms has created a promising material family with rich functionalities.Multiscale wrinkles are intrinsic features of 2D sheets in their 3D assembles.Therefore,the precise wrinkling modulation optimizes the transition of outstanding properties of 2D sheets to expected performances of assembled materials and dominates their fabrication process.The wrinkling evolution of 2D sheets assembling onto flat surfaces has been extensively understood,however,the wrinkling behaviors on the more generally curved surface still remain unclear.Here,we investigate the wrinkling behaviors of graphene oxide sheets assembled onto curved surfaces and reveal the selection rule of wrinkling modes that determined by the curvature mismatch between 2D sheets and target surfaces.We uncover that three wrinkling modes including isotropic cracked land,labyrinth,and anisotropic curtain phases,respectively emerge on flat,spherical,and cylindrical surfaces.A favorable description paradigm is offered to quantitatively measure the complex wrinkling patterns and assess the curvature mismatch constraint underlying the wrinkling mode selection.This research provides a general and quantitative description framework of wrinkling modulation of 2D materials such as high performance graphene fibers,and guides the precise fabrication of particles and functional coatings. | Kaiwen Li Zhanpo Han Lidan Wang Jiaqing Wang Chuanwei Zhang Jiahao Lin Shiyu Luo Li Peng Wenzhang Fang Yingjun Liu Ziliang Wu Yeqiang Tan Chao Gao Zhen Xu | 2023 | Nano Research2023，16，2： | 0 |
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