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Catalyst-Free Growth of Nanographene Films on Various Substrates

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Nano Research 2011年第3期4卷 315-321页

作者： Lianchang Zhang zhiwen shi Yi Wang Rong Yang Dongxia shi Guangyu Zhang Nanoscale Physics and Device Lab Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences Beijing 100190 China Surface Physics Lab Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences Beijing 100190 China

We have developed a new method to grow uniform graphene films directly on various substrates, such as insulators, semiconductors, and even metals, without using any catalyst. The growth was carried out using a remote plasma enhancement chemical vapor deposition （r-PECVD） system at relatively low temperatures, enabling the deposition of graphene films up to 4-inch wafer scale. Scanning tunneling microscopy （STM） confirmed that the films are made up of nanocrystalline graphene particles of tens of nanometers in lateral size. The growth mechanism for the nanographene is analogous to that for diamond grown by PECVD methods, in spite of sp2 carbon atoms being formed in the case of graphene rather than sp3 carbon atoms as in diamond. This growth approach is simple, low-cost, and scalable, and might have potential applications in fields such as thin film resistors, gas sensors, electrode materials, and transparent conductive films.

关键词： Nanographene catalyst-free plasma enhancement chemical vapor deposition (PECVD) transparent and conductive film

Near-Field Optical Identification of Metallic and Semiconducting Single-Walled Carbon Nanotubes

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Chinese Physics Letters 2020年第2期37卷 70-73页

作者： Lele Wang Bosai Lyu Qiang Gao Jiajun Chen Zhe Ying Aolin Deng zhiwen shi Key Laboratory of Artificial Structures and Quantum Control(Ministry of Education) Shenyang National Laboratory for Materials ScienceSchool of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240 Collaborative Innovation Center of Advanced Microstructures Nanjing 210093

Single-walled carbon nanotubes(SWCNTs),due to their outstanding electrical and optical properties,are expected to have extensive applications,such as in transparent conductive fims and ultra-small field-effect transistors(FETs).However,those applications can only be best realized with pure metallic or pure semiconducting ***,identifying and separating metallic from semiconducting SWCNTs in as-grown samples are *** addition,knowledge of the type of an SWCNT is also important for further exploring its new properties in fundamental *** we report employing scanning near-field optical microscopy(SNOM)as a direct and simple method to identify metallic and semiconducting SWCNTs on SiO2/Si *** and semiconducting SWCNTs show distinct near-field optical responses because the metallic tubes support plasmons whereas the semiconducting tubes do *** reliability of this method is verified using FET testing and Rayleigh scattering *** result demonstrates that the SNOM technique provides a reliable,simple,noninvasive and in situ method to distinguish between metallic and semiconducting SWCNTs.

关键词： method separating transparent

Superlubricity enabled dry transfer of non-encapsulated graphene

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Chinese Physics B 2019年第2期28卷 434-438页

作者： Zhe Ying Aolin Deng Bosai Lyu Lele Wang Takashi Taniguchi Kenji Watanabe zhiwen shi Key Laboratory of Artificial Structures and Quantum Control(Ministry of Education) School of Physics and AstronomyShanghai Jiao Tong University Collaborative Innovation Center of Advanced Microstructures National Institute for Materials Science

Transferring high-quality exfoliated graphene flakes onto different substrates while keeping the graphene free of polymer residues is of great importance, but at the same time very challenging. Currently, the only feasible way is the so-called all-dry "pick-and-lift" method, in which a hexagonal boron nitride(hBN) flake is employed to serve as a stamp to pick up graphene from one substrate and to lift it down onto another substrate. The transferred graphene samples, however,are always covered or encapsulated by hBN flakes, which leads to difficulties in further characterizations. Here, we report an improved "pick-and-lift" method, which allows ultra-clean graphene flakes to be transferred onto a variety of substrates without hBN coverage. Basically, by exploiting the superlubricity at the graphene/hBN stack interface, we are able to remove the top-layer hBN stamp by applying a tangential force and expose the underneath graphene.

关键词： superlubricity transfer graphene heterostructures

Quick identification of ABC trilayer graphene at nanoscale resolution via a near-field optical route

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Materials Futures 2023年第1期2卷 158-166页

作者： Peiyue Shen Xianliang Zhou Jiajun Chen Aolin Deng Bosai Lyu Zhichun Zhang Shuo Lou Saiqun Ma Binbin Wei zhiwen shi Key Laboratory of Artificial Structures and Quantum Control(Ministry of Education) Shenyang National Laboratory for Materials ScienceSchool of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093People’s Republic of China Institute of System Engineering Beijing 100191People’s Republic of China

ABC-stacked trilayer graphene has exhibited a variety of correlated phenomena owing to its relatively flat bands and gate-tunable ***,convenient methods are still lacking for identifying ABC graphene with nanometer-scale *** we demonstrate that the scanning near-field optical microscope working in ambient conditions can provide quick recognition of ABC trilayer graphene with no ambiguity and excellent resolution(∼20 nm).The recognition is based on the difference in their near-field infrared(IR)responses between the ABA and ABC *** show that in most frequencies,the response of the ABC trilayer is weaker than the ABA ***,near the graphene phonon frequency(∼1585 cm−1),ABC’s response increases dramatically when gated and exhibits a narrow and sharp Fano-shape resonant line,whereas the ABA trilayer is largely ***,the IR contrast between ABC and ABA becomes reversed and can even be striking(ABC/ABA∼3)near the graphene phonon *** observed near-field IR features can serve as a golden rule to quickly distinguish ABA and ABC trilayers with no ambiguity,which could largely advance the exploration of correlation physics in ABC-stacked trilayer graphene.

关键词： ABC trilayer graphene identification SNOM nanoscale Fano resonance

Guest-Mediated Hierarchical Self-Assembly of Dissymmetric Organic Cages to Form Supramolecular Ferroelectrics Guest-Mediated Hierarchical Self-Assembly of Dissymmetric Organic Cages to Form Supramolecular Ferroelectrics

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CCS Chemistry 2022年第7期4卷 2420-2428页

作者： Xiaoning Liu Gucheng Zhu Dan He Lehua Gu Peiyue Shen Guijia Cui Shaoqiang Wang zhiwen shi Daigo Miyajima shiyong Wang Shaodong Zhang Frontiers Science Center for Transformative Molecules Shanghai Key Laboratory of Electrical Insulation and Thermal AgingSchool of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai 200240 Key Laboratory of Artificial Structures and Quantum Control(Ministry of Education) Shenyang National Laboratory for Materials ScienceSchool of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240 RIKEN Center for Emergent Matter Science WakoSaitama 351-0198 State Key Laboratory of Surface Physics Key Laboratory of Micro and Nano Photonic Structures(MOE)Department of PhysicsFudan UniversityShanghai 200438 Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240

Herein,we report on the guest-responsive hierarchical self-assembly of dissymmetric cage DC-1 with an intrinsic dipole along its C_(3)-symmetric ***-1 molecules self-assemble into supramolecular columns with themolecular dipoles aligned along the columnar *** by different host-guest interactions of ethyl acetate(EtOAc)and chloroform(CHCl_(3)),the columns are arranged in an antiparallel and parallel fashion,respectively,leading to a switch of the centrosym metric and noncentrosymmetric *** symmetry of themolecular packing of DC-1 molecules of the noncentrosymmetric crystalline phase is therefore broken,producing a supramolecular ferroelectric with second-harmonic generation and piezoelectric *** demonstrate that cages can serve as promising building blocks for the discovery of supramolecular materials with emergent functions and properties,including but not limited to,organic ferroelectrics and nonlinear optics.

关键词： dissymmetric cage guest-responsive hierarchical self-assembly symmetry breaking supramolecular ferroelectric

Fano Resonance Enabled Infrared Nano-Imaging of Local Strain in Bilayer Graphene

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Chinese Physics Letters 2021年第5期38卷 60-66页

作者： Jing Du Bosai Lyu Wanfei Shan Jiajun Chen Xianliang Zho u Jingxu Xie Aolin Deng Cheng Hu Qi Liang Guibai Xie Xiaojun Li Weidong Luo zhiwen shi Key Laboratory of Artificial Structures and Quantum Control(Ministry of Education) Shenyang National Laboratory for Materials ScienceSchool of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China Institute of Physics Xi’an Jiaotong UniversityXi’an 710049China National Key Laboratory of Science and Technology on Space Microwave China Academy of Space Technology(Xi’an)Xi’an 710100China Institute of Natural Sciences Shanghai Jiao Tong UniversityShanghai 200240China

Detection of local strain at the nanometer scale with high sensitivity remains *** we report near-field infrared nano-imaging of local strains in bilayer graphene by probing strain-induced shifts of phonon *** a non-polar crystal,intrinsic bilayer graphene possesses little infrared response at its transverse optical phonon *** reported optical detection of local strain is enabled by applying a vertical electrical field that breaks the symmetry of the two graphene layers and introduces finite electrical dipole moment to graphene *** activated phonon further interacts with continuum electronic transitions,and generates a strong Fano *** resulted Fano resonance features a very sharp near-field infrared scattering peak,which leads to an extraordinary sensitivity of-0.002%for the strain *** results demonstrate the first nano-scale near-field Fano resonance,provide a new way to probe local strains with high sensitivity in non-polar crystals,and open exciting possibilities for studying strain-induced rich phenomena.

关键词： red image Fano Resonance Enabled Infrared Nano-Imaging of Local Strain in Bilayer Graphene

Conserved immuno-collagenic subtypes predict response to immune checkpoint blockade

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Cancer Communications 2024年第5期44卷 554-575页

作者： Jie Mei Yun Cai Rui Xu Qing Li Jiahui Chu zhiwen Luo Yaying Sun Yuxin shi Junying Xu Di Li Shuai Liang Ying Jiang Jiayu Liu zhiwen Qian Jiaofeng Zhou Mengyun Wan Yunlong Yang Yichao Zhu Yan Zhang Yongmei Yin Department of Oncology The First Affiliated Hospital of Nanjing Medical UniversityNanjingJiangsuP.R.China The First Clinical Medicine College Nanjing Medical UniversityNanjingJiangsuP.R.China Departments of Gynecology Wuxi Maternal and Child Health Care HospitalWuxi Medical CenterNanjing Medical UniversityWuxiJiangsuP.R.China Departments of Oncology Xuzhou Central HospitalThe Xuzhou School of Clinical Medicine of Nanjing Medical UniversityXuzhouJiangsuP.R.China Department of Sports Medicine Huashan Hospital Affiliated to Fudan UniversityShanghaiP.R.China Department of Sports Medicine Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghaiP.R.China Departments of Oncology The AffiliatedWuxi People’s Hospital of Nanjing Medical UniversityWuxi Medical CenterNanjing Medical UniversityWuxiJiangsuP.R.China Shanghai Outdo Biotech Co. Ltd.National Engineering Center for BiochipShanghaiP.R.China Departments of Gynecology Wuxi Maternity and Child Health Care HospitalAffiliatedWomen’s Hospital of Jiangnan UniversityWuxiJiangsuP.R.China Department of Physiology School of Basic Medical SciencesNanjing Medical UniversityNanjingJiangsuP.R.China Department of Cellular and Genetic Medicine School of Basic Medical SciencesFudan UniversityShanghaiP.R.China Jiangsu Key Lab of Cancer Biomarkers Prevention and TreatmentCollaborative Innovation Center for Personalized Cancer MedicineNanjing Medical UniversityNanjingJiangsuP.R.China

Background:Immune checkpoint blockade(ICB)has revolutionized the treatment of various cancer *** significant preclinical advancements in understanding mechanisms,identifying the molecular basis and predictive biomarkers for clinical ICB responses remains *** evidence,both preclinical and clinical,underscores the pivotal role of the extracellular matrix(ECM)in modulating immune cell infiltration and *** study aimed to create an innovative classifier that leverages ECM characteristics to enhance the effectiveness of ICB ***:We analyzed transcriptomic collagen activity and immune signatures in 649 patients with cancer undergoing ICB *** analysis led to the identification of three distinct immuno-collagenic subtypes predictive of ICB *** validated these subtypes using the transcriptome data from 9,363 cancer patients from The Cancer Genome Atlas(TCGA)dataset and 1,084 inhouse ***,novel therapeutic targets were identified based on these established immuno-collagenic ***:Our categorization divided tumors into three subtypes:“soft&hot”(low collagen activity and high immune infiltration),“armored&cold”(high collagen activity and low immune infiltration),and“quiescent”(low collagen activity and immune infiltration).Notably,“soft&hot”tumors exhibited the most robust response to ICB therapy across various cancer ***,inhibiting collagen augmented the response to ICB in preclinical ***,these subtypes demonstrated associations with immune activity and prognostic predictive potential across multiple cancer ***,an unbiased approach identified B7 homolog 3(B7-H3),an available drug target,as strongly expressed in“armored&cold”tumors,relating with poor ***:This study introduces histopathology-based universal immunocollagenic subtypes capable of predicting ICB responses across diverse cancer *** findings offer insights

关键词： collagen deposition immune infiltration immunotherapy pan-cancer tumor microenvironment

Dynamic disease manifestations among individuals infected with SARS-CoV-2 Omicron variant

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Chinese Medical Journal 2023年第22期136卷 2768-2770页

作者： Peiqin Wang Xinwei Feng zhiwen shi Zimao Jiang Luping Wang Xin Gao Hui Qi Min Chen Jian Wang Weifen Xie Department of Endoscopy Center Changzheng HospitalNaval Medical UniversityShanghai 200003China Department of Gastroenterology Changzheng HospitalNaval Medical UniversityShanghai 200003China Department of Graduate School Naval Medical UniversityShanghai 200003China Department of General Practice Changzheng HospitalNaval Medical UniversityShanghai 200003China

To the Editor:The unprecedented pandemic of coronavirus disease 2019(COVID-19)has put tremendous pressure on healthcare resources and economic development *** acute respiratory syndrome coronavirus 2(SARS-CoV-2)Omicron strain has become the dominant causative strain of COVID-19 in most countries since the end of *** a large cohort study comparing the symptomatic presentation of SARSCoV-2 Omicron and Delta infection has been made in the UK,[1]features and evolution of symptoms of individuals infected with Omicron are rarely reported in other countries or regions,especially among Asian individuals.

关键词： infected acute respiratory

基于自触发脉冲牵制的机坪多智能体网络协同策略

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江苏大学学报（自然科学版） 2023年第2期44卷 194-199,206页

作者：陈维兴石志文中国民航大学电子信息与自动化学院天津300300

针对机坪多智能体网络场景下传统的一致性算法存在收敛性差、资源严重浪费等问题,提出一种基于自触发脉冲牵制的控制策略.基于图论建立机坪多智能体网络模型,设计脉冲激发函数,实现对脉冲触发时刻自行预估;改进节点重要度评价算法,拓宽... 详细信息

针对机坪多智能体网络场景下传统的一致性算法存在收敛性差、资源严重浪费等问题,提出一种基于自触发脉冲牵制的控制策略.基于图论建立机坪多智能体网络模型,设计脉冲激发函数,实现对脉冲触发时刻自行预估;改进节点重要度评价算法,拓宽评价指标的维度,提高牵制节点选取的合理性.在MATLAB中进行网络状态收敛性模拟分析.结果表明:提出的方法在降低采样触发频率、减少受控节点数的同时,有效提高了网络的收敛速度,并使收敛趋势更为平滑,且拓扑结构越简单,控制效果越好.

关键词：机坪网络多智能体网络脉冲控制牵制控制状态同步一致性