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Journal of Semiconductors 2024年第10期45卷 20-34页

作者： Zheng Zhou Yixin Li Zhiyuan Wu Xinping Ma Shichang Fan Shaoyun Huang School of Electronics Beijing Key Laboratory of Quantum Devices Key Laboratory for the Physics and Chemistry of Nanodevices Peking UniversityBeijing 100871China

Electron spins confined in semiconductor quantum dots(QDs)are one of potential candidates for physical implementation of scalable quantum information processing *** coupling based inter exchange interaction between QDs is crucial in achieving single-qubit manipulation,two-qubit gate,quantum communication and quantum *** review first provides a theoretical perspective that surveys a general framework,including the Helter−London approach,the Hund−Mulliken approach,and the Hubbard model,to describe the inter exchange interactions between semiconductor quantum *** electrical method to control the inter exchange interaction in a realistic device is proposed as *** the significant achievements of inter exchange interaction in manipulating single qubits,achieving two-qubit gates,performing quantum communication and quantum simulation are *** last part is a summary of this review.

关键词： exchange interaction quantum dots tunnel coupling quantum computation

Road map for, and technical challenges of, carbon-nanotube integrated circuit technology

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National Science Review 2024年第3期11卷 14-16页

作者： Jia Si Panpan Zhang Zhiyong Zhang key laboratory for the Physics and Chemistry of nanodevices and Center for Carbon-based Electronics School of Electronics Peking University State key laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications

The past decade has witnessed an explosion of research on carbon-nanotube(CNT) electronics due to their outstanding properties, including an ultrathin body, a high carrier mobility and a high saturation velocity.

关键词： TRANSISTORS

Low-thermal-budget synthesis of monolayer MoS2

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Science China Materials 2024年第1期67卷 372-374页

作者： Zongmeng Yang Shibo Fang Jing Lu State key laboratory for Mesoscopic Physics and School of Physics Peking University Collaborative Innovation Center of Quantum Matter beijing key laboratory for Magnetoelectric Materials and Devices (BKL-MEMD) Peking University Peking University Yangtze Delta Institute of Optoelectronics key laboratory for the Physics and Chemistry of nanodevices Peking University beijing key laboratory of Quantum Devices Peking University

Two-dimensional (2D) materials, such as MoS2, have been considered as a competitive coordinate for future electronics due to their excellent electrostatics and high mobility [1–3]. Moreover, the potential integration of 2D materials with silicon circuits can present increased density and multifunction in future heterogeneously integrated circuits [4,5]. However, the high thermal-budget during Mo S2 synthesis exceeds the temperature requirement of direct integration with Si in the back-end-of-line (BEOL) fabrication process [6–8].

关键词： FILMS

Tribological properties and tribomechanism of nickel nanoparticles in-situ synthesized in rapeseed oil

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Friction 2024年第3期12卷 474-489页

作者： Wenya XU Guangbin YANG Shengmao ZHANG Jun XU Yujuan ZHANG Tianhua SUN Ningning SONG Laigui YU Pingyu ZHANG Engineering Research Center for nanomaterials Henan UniversityKaifeng 475004China State key laboratory of Tribology in Advanced Equipment Tsinghua UniversityBeijing 100084China

Nickel(Ni)nanoparticles can be enriched on the surface of iron-based frictional pairs,which provides the possibility to get rid of the competitive adsorption between the polar species of vegetable oil and the surface-active nano-additives *** this paper,nickel acetylacetonate was used as a precursor to in-situ synthesize nickel nanoparticles with an average diameter of about 12 nm in rapeseed oil(RO)as the reducing agent,surface modifier,and solvent as *** tribological properties of the as-synthesized Ni nanoparticles were evaluated with a four-ball tribometer,and their tribomechanism was investigated based on the characterizations of the tribofilm on rubbed steel surfaces by the scanning electron microscopy(SEM),transmission electron microscopy(TEM),and X-ray photoelectron spectroscopy(XPS).It was found that the Ni nanoparticles in-situ prepared in the RO with a mass fraction of 0.3%can reduce the wear scar diameter(WSD)of the steel ball by 36%.This is because,on the one hand,the Ni nanoparticles are adsorbed on the rubbed steel surfaces to repair or fill up the micro-pits and grooves *** the other hand,Ni nanoparticles participate in tribochemical reactions with atmospheric O and steel substrate to form the tribochemical reaction film on the rubbed steel surfaces with the assistance of friction-induced heat and applied normal *** addition,an amorphous carbon film is formed on the rubbed surface via the carbonization of base oil under the catalysis of Ni *** adsorbed Ni layer,the tribochemical reaction film,and the carbon layer comprise a composite tribofilm composed of amorphous carbon,polar fatty acid,metallic nickel,iron oxides,and nickel oxides on the rubbed steel surfaces,which contributes to significantly improving the antiwear ability and load-carrying capacity of the RO for the steel-steel sliding pair.

关键词： nickel(Ni)nanoparticles rapeseed oil(RO) in-situ synthesis tribological properties tribomechanism

Enhanced electrocatalytic CO_(2)reduction to formic acid using nanocomposites of In_(2)O_(3)@C with graphene

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Nano Research 2024年第6期17卷 5031-5039页

作者： Wenxiang Li Shuo Gao Chuanruo Yang Juntao Yang Amjad Nisar Guolei Xiang Junsu Jin beijing key laboratory of Membrane Science and Technology Beijing University of Chemical TechnologyBeijing 100029China nanomaterials Research Group PDPINSTECHIslamabad 44000Pakistan Institute of Industrial Chemistry College of ChemistryBeijing University of Chemical TechnologyBeijing 100029China

In_(2)O_(3)is an effective electrocatalyst to convert CO_(2)to formic acid(HCOOH),but its inherent poor electrical conductivity limits the efficient charge transfer during the ***,the tendency of In_(2)O_(3)particles to agglomerate during synthesis further limits the exposure of active *** we address these issues by leveraging the template effect of graphene oxide and employing InBDC as a self-sacrificing template for the pyrolysis synthesis of In_(2)O_(3)@*** resulting In_(2)O_(3)@C/rGO-600 material features In_(2)O_(3)@C nanocubes uniformly anchored on a support of reduced graphene oxide(rGO),significantly enhancing the active sites *** conductive rGO network facilitates charge transfer during electrocatalysis,and the presence of oxygen vacancies generated during pyrolysis,combined with the strong electron-donating ability of rGO,enhances the adsorption and activation of CO_(2).In performance evaluation,In_(2)O_(3)@C/rGO-600 exhibits a remarkable HCOOH Faradaic efficiency exceeding 94.0%over a broad potential window of−0.7 to−1.0 V(*** hydrogen electrode(RHE)),with the highest value of 97.9%at−0.9 V(***)in a ***,the material demonstrates an excellent cathodic energy efficiency of 71.6%at−0.7 V(***).The study underscores the efficacy of uniformly anchoring metal oxide nanoparticles onto rGO for enhancing the electrocatalytic CO_(2)reduction performance of materials.

关键词： In_(2)O_(3)@C nanocomposite electrochemical CO_(2)reduction reduced graphene oxide oxygen vacancy

Screened peptides from one-bead one-compound technique extend half-life of peptide drugs in circulation through binding to albumin

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Chinese Chemical Letters 2024年第3期35卷 384-388页

作者： Yi-Jing Li Lingze Zhang Ming-Hao Pang Pei-Pei Yang Lu-Ming Guo Kuo Zhang Da-Yong Hou Lei Wang Hao Wang Hui Cao State key laboratory for Advanced Metals and Materials School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China CAS Center for Excellence in Nanoscience CAS Key Laboratory for Biomedical Effects of Nanomaterials NanosafetyNational Center for Nanoscience and Technology(NCNST)Beijing 100190China

Peptide drugs are known for their high biological ***,compared with small molecule drugs,peptide drugs are easily oxidized and hydrolyzed as well as short in ***,inspired by the long circulation of albumin in blood,we screened albumin binding peptides(ABPs)from a one-bead one-compound(OBOC)peptide library to increase the half-life of peptide *** displaying random peptides were screened using fluorescent labeled human serum *** beads with specific binding to albumin were isolated for *** selected ABPs can effectively bind to albumin,thus possessing the long circulation of *** dissociation constant(K_(D))of ABPs to albumin is up to 1×10^(-8)mol/*** one of ABPs(ABP2)was coupled to triptorelin,the circulation half-life of triptorelin in mice was significantly prolonged to 263.50 h much longer than that of triptorelin alone(179.07 h).In addition,the combination therapy using ABP-conjugated triptorelin and doxorubicin(DOX)can effectively inhibit the proliferation of tumor cells in *** OBOC screening strategy and resulting ABPs showed great potential for enhancing the delivery efficiency of peptide drugs.

关键词： One-bead one-compound Combinatorial library Albumin binding Drug delivery Triptorelin

Surface tension of single suspended aerosol microdroplets

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Chinese Chemical Letters 2024年第4期35卷 520-524页

作者： Yukai Tong Zhijun Wu Bo Zhou Min Hu Anpei Ye key laboratory for the Physics and Chemistry of nanodevices School of ElectronicsPeking UniversityBeijing 100871China State key Joint laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China Aerospace Information Research Institute Chinese Academy of SciencesBeijing 100094China

The surface tension of troposphere aerosols can significantly influence their atmospheric processes and key properties, particularly on the morphology, the phase transition, the activation as cloud condensation nuclei, and the gas-particle partitioning. However, directly measuring the surface tension of single ambient aerosol is quite challenging, due to the limitations of their picolitre volumes and thermal motion. Here, we developed a dual laser tweezers Raman spectroscopy(DLT-RS) system to directly sense the surface tension of single airborne microdroplets(PM10particles). A pair of aerosol droplets were trapped and driven to coalesce by the laser tweezers. Meanwhile, the backscattering light intensity and brightfield images during the coalescence process were recorded to characterize the aerosol surface tension. A remarkable advantage of directly sensing aerosol surface tension is that the solutes in aerosols are often supersaturated, which is common in atmospheric aerosols but almost unavailable in bulk *** experimentally measured the surface tension of aerosols composed of nitrates or oxalic acid/nitrate mixture. Besides, the variation of surface tension during aerosol aging process was also explored, which brings possible implications on the surface evolution of actual ambient aerosol during their atmospheric lifetime.

关键词： Surface tension Droplet coalescence Single aerosol Laser tweezers Aerosol aging

Nanotechnology in Bioanalytical Chemistry

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Chemical Research in Chinese Universities 2024年第2期40卷 159-161页

作者： CHEN Chunying ZHAO Yuliang CAS key laboratory for Biomedical Effects of nanomaterials&Nanosafety National Center for Nanoscience and TechnologyBeijing 100190P.R.China

With the increasing advances in bioanalytical chemistry,nanotechnology has become an important tool and key technology for improving the understanding of fundamental chemistry and biology *** ratio of surface area to volume of materials exponentially increases at the nanoscale,leading to the emergence of numerous novel physical and chemical *** instance,the surface energy of nanomaterials becomes significantly more pronounced compared to volume energy.

关键词： exponentially instance energy.

Ohmic-contact ballistic 2D In Se transistors:promising candidates for more Moore electronics

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Science China(Information Sciences) 2024年第3期67卷 311-312页

作者： Hong LI Qiuhui LI Jing LU College of Mechanical and Material Engineering North China University of Technology State key laboratory for Mesoscopic Physics and Department of Physics Collaborative Innovation Center of Quantum Matter beijing key laboratory for Magnetoelectric Materials and Devices Peking University Yangtze Delta Institute of Optoelectronics key laboratory for the Physics and Chemistry of nanodevices Peking University

The scaling of silicon-based metal-oxide-semiconductor fieldeffect transistors(MOSFETs) approaches its physical limits at a gate length(LG) of 12 nm and supply voltage(VDD) of 0.6 V according to the International Road...

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The p38/MAPK pathway as a therapeutic target to prevent therapeutic escape of breast cancer stem cells

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Science China(Life Sciences) 2024年第9期67卷 1867-1880页

作者： Weixiao Yan Xiaotong Wang Wenjing Wang Qi Guo Na Huang Hao Chen Xing-Jie Liang Yu Han Dandan Liu Jinchao Zhang State key laboratory of New Pharmaceutical Preparations and Excipients/key laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education/College of Chemistry and Materials Science Chemical Biology Key Laboratory of Hebei ProvinceHebei UniversityBaoding 071002China CAS key laboratory for Biological Effects of nanomaterials and Nanosafety National Center for Nanoscience and TechnologyBeijing 100190China

Cancer stem cells(CSCs)play an important role in metastasis development,tumor recurrence,and treatment resistance,and are essential for the eradication of ***,therapies fail to eradicate CSCs due to their therapeutic stress-induced cellular escape,which leads to enhanced aggressive behaviors compared with CSCs that have never been ***,the underlying mechanisms regulating the therapeutic escape remain *** this end,we established a model to isolate the therapeutic escaped CSCs(TSCSCs)from breast CSCs and performed the transcription profile to reveal the ***,we demonstrated that the behavior of therapeutic escape was regulated through the p38/MAPK signaling pathway,resulting in TSCSCs exhibiting enhanced motility and ***,blocking the p38/MAPK signaling pathway effectively reduced motility and metastasis ability both in vitro and in vivo,which were further supported by downregulated motility-related genes and epithelial-mesenchymal transition(EMT)-related proteins vimentin and *** obtained findings reveal the p38/MAPK pathway as a potential therapeutic target for TSCSCs and would provide profound implications for cancer therapy.

关键词： therapeutic escape breast cancer stem cells motility p38/MAPK signaling pathway molecular mechanism