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| 1 | Strong exciton-photon interaction and lasing of two-dimensional transition metal dichalcogenide semiconductors显示文摘Two-dimensional(2D)transition metal dichalcogenide(TMDC)semiconductors not only hold great promises for the development of ultra-thin optoelectronic devices with low-energy consumption,but also provide ideal platforms to explore and tailor light-matter interaction,e.g.,the exciton-photon interaction,at the atomic level,due to their atomic thickness,large exciton binding energy,and unique valley properties.In recent years,the exciton-photon interactions in TMDC semiconductor microcavities,including the strong exciton-photon coupling and lasing,have drawn increasing attention,which may open up new application prospects for transparent,on-chip coherent,and quantum light sources.Herein,we review the research progresses of strong exciton-photon interaction and lasing of TMDC semiconductors.First,we introduce the electronic structure,exciton,and emission properties of semiconducting TMDCs in the weak exciton-photon coupling regime.Next,the progresses on strong exciton-photon interaction and exciton-polaritons of these TMDCs are discussed from the aspects of photophysics,materials and fabrications,spectroscopies,and controls.Further,the progresses on TMDC lasers are introduced in the aspects of cavity types and materials,and finally,the challenges and prospects for these fields are discussed. | Liyun Zhao Qiuyu Shang Meili Li Yin Liang Chun Li Qing Zhang | 2021 | Nano Research2021，14，6： | 3 |
| 2 | Photoluminescence properties of ultrathin CsPbCl_3 nanowires on mica substrate显示文摘Fabricating high-quality cesium lead chloride(CsPbCl_3) perovskite nanowires(NWs) with dimension below 10 nm is not only of interests in fundamental physics, but also holds the great promise for optoelectronic applications. Herein, ultrathin CsPbCl_3 NWs with height of ~7 nm, have been achieved via vapor phase deposition method. Power and temperature-dependent photoluminescence(PL) spectroscopy is performed to explore the emission properties of the CsPbCl_3 NWs. Strong free exciton recombination is observed at ~3.02 eV as the temperature(T) is 78-294 K with binding energy of ~ 37.5 meV. With the decreasing of T, the PL peaks exhibit a first blueshift by 2 meV for T ~ 294-190 K and then a redshift by 4 meV for T ~ 190-78 K. The exciton–optical phonon interaction plays a major role in the linewidth broadening of the PL spectra with average optical phonon energy of ~48.0 meV and the interaction coefficient of 203.9 meV. These findings advance the fabrication of low dimensional CsPbCl_3 perovskite and provide insights into the photophysics of the CsPbCl_3 perovskite. | Yan Gao Liyun Zhao Qiuyu Shang Chun Li Zhen Liu Qi Li Xina Wang Qing Zhang | 2019 | Journal of Semiconductors2019，40，5： | 1 |
| 3 | Preparation of polydopamine based redox-sensitive magnetic nanoparticles for doxorubicin delivery and MRI detection显示文摘To improve the water-dispersity of superparamagnetic iron oxide nanoparticles(SPIONs),a novel polydopamine based redox-sensitive copolymer modified SPIONs were prepared for the biomedical application to deliver doxorubicin(DOX)and magnetic resonance imaging(MRI)detection.The major components of this nanoparticle include SPIONs and the redox-sensitive polydopamine(rPDA)crosslinked copolymer,where N,N-Bis(acryloyl)cystamine served as cross-linker,dopamine methacrylamide and a long-chain polyethylene glyco methyl ether methacrylate acted as comonomers.Here the rPDA@SPIONs were formed by the ligand exchange reaction of dopamine moiety with the oleic acid layer capped on the surface of SPIONs,and the inner area of the nanoparticles formed a reservoir for DOX,while the hydrophilic PEG moiety helped the nanoparticles well-dispersible in aqueous solution.The DOX-loaded rPDA@SPIONs demonstrated a high drug loading efficiency of 857μg DOX per mg iron,and a strong T2 relaxivity of 123 mM-1•S^(-1)for MRI.The drug release analysis of drug-loaded nanoparticles showed a sustained and high cumulative drug release in GSH up to 73%within 48 h,rather than the relatively low release rate of 37%in PBS(pH 7.4)without GSH.All the results showed that the designed magnetic nanoparticle may be a promising vehicle for anticancer drug delivery with stimuli-triggered drug release behavior,and also a foundation for building smart theranostic formulations for efficient detection through MRI. | Le Shang Qiuyue Wang Kanglong Chen Jing Qu Jian-bin Luo Qing-han Zhou | 2017 | Journal of Bioresources and Bioproducts2017，2，2： | 0 |
| 4 | An on-Si directional second harmonic generation amplifier for MoS2/WS2 heterostructure显示文摘Transition metal dichalcogenides(TMD)heterostructure is widely applied for second harmonic generation(SHG)and holds great promises for laser source,nonlinear switch,and optical logic gate.However,for atomically thin TMD heterostructures,low SHG conversion efficiency would occur due to reduction of light-matter interaction length and lack of phase matching.Herein,we demonstrated a facile directional SHG amplifier formed by MoS2/WS2 monolayer heterostructures suspended on a holey SiO_(2)/Si substrate.The SHG enhancement factor reaches more than two orders of magnitude in a wide spectral range from 355 to 470 nm,and the radiation angle is reduced from 38°to 19°indicating higher coherence and better emission directionality.The giant SHG enhancement and directional emission are attributed to the great excitation and emission field concentration induced by a self-formed vertical Fabry-Pérot microcavity.Our discovery gives helpful insights for the development of two-dimensional(2D)nonlinear optical devices. | Jiaxing Du Jianwei Shi Chun Li Qiuyu Shang Xinfeng Liu Yuan Huang Qing Zhang | 2023 | Nano Research2023，16，3： | 0 |
| 5 | Differential immune responses in pregnant patients recovered from COYID-19显示文摘Pregnant women are generally more susceptible to viral infection.Although the impact of SARS-CoV-2 in pregnancy remains to be determined,evidence indicates that the risk factors for severe COVID-19 are similar in pregnancy to the general population.Here we systemically analyzed the clinical characteristics of pregnant and non-pregnant female COVID-19 patients who were hospitalized during the same period and found that pregnant patients developed marked lymphopenia and higher inflammation evident by higher C-reactive protein and IL-6.To elucidate the pathways that might contribute to immunopathology or protective immunity against COVID-19 during pregnancy,we applied single-cell mRNA sequencing to profile peripheral blood mononuclear cells from four pregnant and six non-pregnant female patients after recovery along with four pregnant and three non-pregnant healthy donors.We found normal clonal expansion of T cells in the pregnant patients,heightened activation and chemotaxis in NK,NKT,and MAIT cells,and differential interferon responses in the monocyte compartment.Our data present a unique feature in both innate and adaptive immune responses in pregnant patients recovered from COVID-19. | Ge Chen Yiming Zhang Yaoyao Zhang Jihui Ai Bin Yang Mengge Cui Qiuyue Liao Hanxiao Chen Hualin Bai Dashing Shang Jing Chen ChaoYang Sun Haiyi Liu Fengyuan Liu Bin Mao Guoqiang Sun Lu Chen Jing-wen Lin Kezhen Li | 2021 | Signal Transduction and Targeted Therapy2021，6，8： | 0 |
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