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| 1 | Broadband ultrafast nonlinear optical response of few-layers graphene: toward the mid-infrared regime显示文摘Gapless linear energy dispersion of graphene endows it with unique nonlinear optical properties, including broadband nonlinear absorption and giant nonlinear refractive index. Herein, we experimentally observed that fewlayers graphene has obvious nonlinear absorption and large nonlinear refraction, as investigated by the Z-scan technique in the mid-infrared(mid-IR) regime. Our study may not only, for the first time to our knowledge, verify the giant nonlinear refractive index of graphene(~10-7cm2∕W) at the mid-IR, which is 7 orders of magnitude larger than other conventional bulk materials, but also provide some new insights for graphene-based mid-IR photonics,potentially leading to the emergence of several new conceptual mid-IR optoelectronics devices. | Lili Miao Yaqin Jiang Shunbin Lu Bingxin Shi Chujun Zhao Han Zhang Shuangchun Wen | 2015 | Photonics Research2015，3，5： | 7 |
| 2 | Ultrafast nonlinear absorption and nonlinear refraction in few-layer oxidized black phosphorus显示文摘We experimentally investigated the nonlinear optical response in few-layer oxidized black phosphorus(OBP) by the femtosecond Z-scan measurement technique, and found that OBP not only possesses strong ultrafast saturable absorption but also a nonlinear self-defocusing effect that is absent in black phosphorus(BP). The saturable absorption property originates mainly from the direct band structure, which is still maintained in OBP. The emergence of self-defocusing might originate from the combined consequences of the oxygen-induced defects in BP. Our experimental findings might constitute the first experimental evidence on how to dynamically tune its nonlinear property, offering an inroad in tailoring its optical properties through chemical modification(oxidation, introducing defects, etc.). The versatile ultrafast nonlinear optical properties(saturable absorption and self-defocusing) imply a significant potential of the layered OBP in the development of unprecedented optoelectronic devices, such as mode lockers, optical switches, laser beam shapers, and wavelength converters. | Shunbin Lu Yanqi Ge Zhengbo Sun Zongyu Huang Rui Cao Chujun Zhao Shuangchun Wen Dianyuan Fan Jianqing Li Han Zhang | 2016 | Photonics Research2016，4，6： | 5 |
| 3 | Lipid Distribution in Marine Sediments from the Northern South China Sea and Association with Gas Hydrate显示文摘The distributions of lipids in surface and subsurface sediments from the northern South China Sea were determined. The n-alkanes were in bimodal distribution that is characterized by a centre at n-C16 –n-C20 with maximum at C18(or C19) and n-C27 –n-C31 as well as at C29(or C31). The short-chain alkanes suffered from significant losses due to their slow deposition in the water column, and their presence with a slight even carbon predominance in shallow seafloor sediments was ascribed mainly to the direct input from the benthos. The long-chain alkanes with odd predominance indicate transportion of terrigenous organic matter. Immature hopanoid biomarkers reflect the intense microbial activity for bacteria–derived organic matter and the gradual increase of maturity with burial depth. Abundant n-fatty acid methyl esters(n-FAMEs) that are in distributions coincident with fatty acids were detected in all samples. We proposed that the observed FAMEs originated from the methyl esterification of fatty acids; methanol production by methanotrophs and methanogenic archaea related to the anaerobic oxidation of methane, and sulfate reduction provided an O–methyl donor for methylation of fatty acids. The CH4 released from hydrate dissociation at oxygen isotope stage II of Cores ZD3 and ZS5, which had been confirmed by the occurrence of negative δ13C excursion and spherical pyrite aggregates, could have accelerated the above process and thus maximized the relative content of FAMEs at ZD3-2(400–420 cm depth) and ZS5-2(241–291 cm depth). | OU Wenjia LEI Huaiyan LU Wanjun ZHANG Jie SHI Chunxiao GONG Chujun HAN Chao | 2014 | Acta Geologica Sinica(English Edition)2014，88，1： | 4 |
| 4 | The Z-scheme g-C_(3)N_(4)/3DOM-WO_(3) photocatalysts with enhanced activity for CO_(2) photoreduction into CO显示文摘The catalytic performance of light-derived CO_(2)reduction with H_(2)O is strongly dependent on the sepa-ration efficiency of photogenerated carriers.Herein,the direct Z-scheme catalysts(g-C_(3)N_(4)/3DOM-WO_(3))of graphitic carbon nitride(g-C_(3)N_(4))nanosheets decorated three-dimensional ordered macroporous WO_(3)(3DOM-WO_(3))were successfully fabricated by using the in-situ colloidal crystal template method.The slow light effect of 3DOM-WO_(3)photonic crystals expands the absorption of visible light and improves the uti-lization of light energy.The Z-scheme structure of g-C_(3)N_(4)/3DOM-WO_(3)catalysts is able to upgrade the separation efficiency of photogenerated electron-hole pairs.The g-C_(3)N_(4)/3DOM-WO_(3)photocatalyst,whose formation rate of CO product is 48.7μmol g^(−1)h^(−1),exhibits the excellent catalytic activity for CO_(2)reduc-tion.The transfer pathway of stimulated electrons over the g-C_(3)N_(4)/3DOM-WO_(3)photocatalyst is proposed and discussed.The present approach provides unique insights into the rational development of high-performance photochemical systems for efficient CO_(2)reduction into valuable carbon-containing chemicals and energy fuels. | Zhiling Tang Chujun Wang Wenjie He Yuechang Wei Zhen Zhao Jian Liu | 2022 | Chinese Chemical Letters2022，33，2： | 3 |
| 5 | Highly stable femtosecond pulse generation from a MXene Ti_3C_2T_x(T = F, O, or OH) mode-locked fiber laser显示文摘Ultrafast fiber lasers are in great demand for various applications, such as optical communication, spectroscopy,biomedical diagnosis, and industrial fabrication. Here, we report the highly stable femtosecond pulse generation from a MXene mode-locked fiber laser. We have prepared the high-quality Ti_3C_2 T_x nanosheets via the etching method, and characterized their ultrafast dynamics and broadband nonlinear optical responses. The obvious intensity-and wavelength-dependent nonlinear responses have been observed and investigated. In addition, a highly stable femtosecond fiber laser with signal-to-noise ratio up to 70.7 dB and central wavelength of 1567.3 nm has been delivered. The study may provide some valuable design guidelines for the development of ultrafast, broadband nonlinear optical modulators, and open new avenues toward advanced photonic devices based on MXenes. | JIE LI ZILONG ZHANG LIN DU LILI MIAO JUN YI BIN HUANG YANHONG ZOU CHUJUN ZHAO SHUANGCHUN WEN | 2019 | Photonics Research2019，7，3： | 3 |
| 6 | Soliton fiber laser mode locked with two types of film-based Bi2Te3 saturable absorbers显示文摘We propose a low-threshold soliton fiber laser passively mode locked with two different types of film-like saturable absorbers, one of which is fabricated by mixing Bi2Te3 with de-ionized water, as well as polyvinyl alcohol(PVA), and then evaporating them in a Petri dish, and the other of which is prepared by directly dropping Bi2Te3 solution on the PVA film. Both Bi2Te3–PVA films exhibit outstanding features of low loss, high flexibility, and easy synthesis. By incorporating Bi2Te3–PVA films into fiber lasers, stable single-soliton emissions are obtained at a low pump power of 13 mW. Our results suggest that the Bi2Te3 can work as a promising mode locker for ultrafast lasers,while PVA is an excellent host for fabricating high-performance film-based saturable absorbers. | Dong Mao Biqiang Jiang Xuetao Gan Chaojie Ma Yu Chen Chujun Zhao Han Zhang Jianbang Zheng Jianlin Zhao | 2015 | Photonics Research2015，3，2： | 3 |
| 7 | Pt nanocrystallines/TiO_2 with thickness-controlled carbon layers:Preparation and activities in CO oxidation显示文摘In this work, a series of Pt nanocrystallines(Pt NCs) supported on TiO_2 substrate with controlled thickness of carbon layers(C-Pt/TiO_2) were synthesized. Well-dispersed Pt NCs were facilely synthesized at room temperature by a photo-reduction process in lytropic liquid crystal(LCs). Surface tuning of the carbon layers on Pt/TiO_2 catalysts was achieved by varying the calcination atmospheres(in argon, air, and oxygen) and characterized by XPS and HRTEM. The influence of the coated carbon layers on the catalytic activity of catalysts is investigated by CO oxidation reaction which presented the following ranks: C-Pt/TiO_2-O_2> C-Pt/TiO_2-Air > C-Pt/TiO_2-Ar. It is found that the carbon layer coating can stabilize the Pt NCs and enable them anti-sintering at high temperature. This finding provides new insight into understanding the C-Pt/TiO_2 ternary system for tuning their catalytic performance. | Man Zhou Muhong Li Chujun Hou Zhongyu Li Yongzheng Wang Kun Xiang Xuefeng Guo | 2018 | Chinese Chemical Letters2018，29，6： | 2 |
| 8 | Ti2CTx MXene-based all-optical modulator显示文摘MXenes,a new class of 2D transition metal carbides,nitrides,and carbonitrides,have attracted much attention due to their outstanding properties.Here,we report the broadband spatial self-phase modulation of Ti2CTx MXene nanosheets dispersed in deionized water in the visible to near-infrared regime,highlighting the broadband nonlinear optical(NLO)response of Ti2CTx MXene.Using ultrafast pulsed laser excitation,the nonlinear refractive index n2 and the thirdorder nonlinear susceptibility χ^(3)monolayer of Ti2CTx MXene were measured to be^10^−13 m^2/W and ~10^−10 esu,respectively.Leveraging the large optical nonlinearity of Ti2CTx MXene,an all-optical modulator in the visible regime was fabricated based on the spatial cross-phase modulation effect.This work suggests that 2D MXenes are ideal broadband NLO materials with excellent prospects in NLO applications. | Jun Yi Jie Li Shuohan Huang Longyu Hu Lili Miao Chujun Zhao Shuangchun Wen Vadym N.Mochalin Apparao M.Rao | 2020 | InfoMat2020，2，3： | 1 |
| 9 | Dependence of sperm structural and functional integrity on testicular calcineurin isoform PPP3R2 expression显示文摘After leaving the testis,mammalian sperm undergo a sequential maturation process in the epididymis followed by capacitation during their movement through the female reproductive tract.These phenotypic changes are associated with modification of protein phosphorylation and membrane remodeling,which is requisite for sperm to acquire forward motility and induce fertilization.However,the molecular mechanisms underlying sperm maturation and capacitation are still not fully understood.Herein,we show that PPP3R2,a testis-specific regulatory subunit of protein phosphatase 3(an isoform of calcineurin in the testis),is essential for sperm maturation and capacitation.Knockout of Ppp3r2 in mice leads to male sterility due to sperm motility impairment and morphological defects.One very noteworthy change includes increases in sperm membrane stiffness.Moreover,PPP3R2 regulates sperm maturation and capacitation via(i)modulation of membrane diffusion barrier function at the annulus and(ii)facilitation of cholesterol efflux during sperm capacitation.Taken together,PPP3R2 plays a critical role in modulating cholesterol efflux and mediating the dynamic control of membrane remodeling during sperm maturation and capacitation. | Yue Liu Chujun Zhang Shiyao Wang Yanqin Hu Jia Jing Luyao Ye Ran Jing Zhide Ding | 2020 | Journal of Molecular Cell Biology2020，12，7： | 1 |
| 10 | Field and dispersion properties of subwavelength-diameter hol-low optical fiber显示文摘 | Zhao Chujun Tang Zhixiang Ye Yunxia | 2007 | Optics Express2007，15，11： | 1 |
| 11 | Smoothing effect in the broadband laser through a dispersive wedge显示文摘 | Runwu Peng Yunxia Ye Zhixiang Tang Chujun Zhao Shuangchun Wen Dianyuan Fan | 2006 | Optics Communications2006，，1： | 1 |
| 12 | Understanding energetic disorder in electron-deficient-core-based non-fullerene solar cells显示文摘Recent advances in material design for organic solar cells(OSCs)are primarily focused on developing near-infrared nonfullerene acceptors,typically A-DA′D-A type acceptors(where A abbreviates an electron-withdrawing moiety and D,an electron-donor moiety),to achieve high external quantum efficiency while maintaining low voltage loss.However,the charge transport is still constrained by unfavorable molecular conformations,resulting in high energetic disorder and limiting the device performance.Here,a facile design strategy is reported by introducing the'wing'(alkyl chains)at the terminal of the DA′D central core of the A-DA′D-A type acceptor to achieve a favorable and ordered molecular orientation and therefore facilitate charge carrier transport.Benefitting from the reduced disorder,the electron mobilities could be significantly enhanced for the'wing'-containing molecules.By carefully changing the length of alkyl chains,the mobility of acceptor has been tuned to match with that of donor,leading to a minimized charge imbalance factor and a high fill factor(FF).We further provide useful design strategies for highly efficient OSCs with high FF. | Jun Yuan Chujun Zhang Honggang Chen Can Zhu Sin Hang Cheung Beibei Qiu Fangfang Cai Qingya Wei Wei Liu Hang Yin Rui Zhang Jidong Zhang Ye Liu Huotian Zhang Weifang Liu Hongjian Peng Junliang Yang Lei Meng Feng Gao Shukong So Yongfang Li Yingping Zou | 2020 | Science China Chemistry2020，63，8： | 1 |
| 13 | Large-scale roll-to-roll printed,flexible and stable organic bulk heterojunction photodetector显示文摘A flexible and stable photodetector shows great potential applications in intelligent wearable devices,health monitoring,and biological sensing.The high-output fabrication of flexible and stable photodetector via the large-scale printing process would accelerate its commercialization.Herein,a high performance,flexible organic bulk heterojunction(BHJ)photodetector with good stability is designed and fabricated via a large-scale roll-to-roll(R2R)micro-gravure printing technique on polyethylene terephthalate(PET)or paper substrate,in which the organic BHJ active layer is structured with[6,6]-phenyl C_(61)butyric acid methyl ester(PCBM)and a donor-acceptor copolymer,i.e.,employing 4,8-bis(2-ethylhexylthiophene)benzo[1,2-b;3,4-b′]dithiophene(BDTT)as the donor unit and 5,8-bis(5-thiophen-2-yl)-6,7-difluoro-2,3-bis(4-ethylhexyloxy-1-mata-luorophenyl)quinoxaline(ffQx)as the acceptor unit(PBDTT-ffQx).The PBDTT-ffQx/PCBM BHJ photodetector shows a broad photoresponse in ultraviolet and visible light,a high detectivity(D^(*))value up to 6.19×10^(11)Jones,and an excellent Iphoto/Idark as high as 5.6×10^(2).It exhibits excellent flexibility and stability.Its performance parameters could maintain over 80%of original values after bending 10,000 cycles or exposing in ambient condition(humidity~50%,temperature~30℃)for 50 days without any encapsulation.More importantly,the R2R micro-gravure printed PBDTT-ffQx/PCBM BHJ active layer is great homogeneous,and the responsivity(R)values of photodetector arrays show a very narrow distribution.The research results show that a high-performance PBDTT-ffQx/PCBM BHJ photodetector with well reliability and reproducibility can be fabricated via the R2R micro-gravure printing technique,which provides an available strategy for fabricating large-area and flexible electronic and optoelectronic devices. | Sichao Tong Jun Yuan Chujun Zhang Chunhua Wang Baoxing Liu Jianqiang Shen Huayan Xia Yingping Zou Haipeng Xie Jia Sun Si Xiao Jun He Yongli Gao Junliang Yang | 2018 | npj Flexible Electronics2018，2，1： | 0 |
| 14 | Lycium ruthenicum Murr. treatment attenuates APP_(SWE)/PS1ΔE9 mouse model-like mitochondrial dysfunction in Slc25a46 knockout mouse model显示文摘Mitochondrial dysfunction is proposed to be substantially associated with ageing and ageing-related diseases like Alzheimer's disease(AD). However, it is unclear whether different mouse models with mitochondrialrelated diseases have similar changes in mitochondrial morphology of the same tissues. Moreover, whether similarities in mitochondrial morphology can be a suitable marker for screening and/or discovering mitochondrial-protective substances remains unknown. Mitochondria morphology in different tissues of a novel mitochondrial outer membrane protein Slc25a46 knockout mouse and a traditional APP_(SWE)/PS1ΔE9 transgenic mouse were examined using transmission electron microscope(TEM). Both young Slc25a46 knockout mice and aged APP_(SWE)/PS1ΔE9 mice models showed similar mitochondrial damage in cerebellum tissues. The results indicated that different mitochondrial-related diseases shared similar alteration and defects in mitochondrial morphology. Furthermore, Lycium ruthenicum Murr. extract, a bioactive food substance with cognition-improving property, could effectively improve muscle strength and increase body weight in the Slc25a46 knockout mice. These findings suggest that mitochondrial morphology defects in mice models, particularly in the mitochondrial compartment, represent a unified and effective marker for screening and validating natural product-derived functional substances with mitochondrial protective properties. It also holds potential application in mitochondrial-impaired senile neurodegenerative diseases, especially in AD. | Min Wang Tianxiong Xu Li Gao Chujun Huang Piao Xu Congcong Gong William Kwame Amakye Linfeng Liao Maojin Yao Jiaoyan Ren | 2023 | Food Science and Human Wellness2023，12，5： | 0 |
| 15 | Broadband mid-infrared nonlinear optical modulator enabled by gold nanorods:towards the mid-infrared regime显示文摘Mid-infrared pulsed lasers operating around the 3 μm wavelength regime are important for a wide range of applications including sensing, spectroscopy, imaging, etc. Despite the recent advances in technology, the lack of a nonlinear optical modulator operating in the mid-infrared regime remains a significant challenge. Here, we report the third-order nonlinear optical response of gold nanorods(GNRs) ranging from 800 nm to the mid-infrared regime(2810 nm) enabled by their size and overlapping behavior-dependent longitudinal surface plasmon resonance. In addition, we demonstrate a wavelength-tunable Er3+-doped fluoride fiber laser modulated by GNRs, which can deliver pulsed laser output, with the pulse duration down to 533 ns, tunable wavelength ranging from 2760.2 to 2810.0 nm, and spectral 3 d B bandwidth of about 1 nm. The experimental results not only validate the GNRs’ robust mid-infrared nonlinear optical response, but also manifest their application potential in high-performance broadband optoelectronic devices. | BIN HUANG ZHE KANG JIE LI MINGYI LIU PINGHUA TANG LILI MIAO CHUJUN ZHAO GUANSHI QIN WEIPING QIN SHUANGCHUN WEN PARAS N.PRASAD | 2019 | Photonics Research2019，7，6： | 0 |
| 16 | Coarse-fine joint target parameter estimation method based on AN-RSC in OFDM passive radar显示文摘In this paper,we study the accuracy of delay-Doppler parameter estimation of targets in a passive radar using orthogonal frequency division multiplexing(OFDM)signal.A coarse-fine joint estimation method is proposed to achieve better estimation accuracy of target parameters without excessive computational burden.Firstly,the modulation symbol domain(MSD)method is used to roughly estimate the delay and Doppler of targets.Then,to obtain high-precision Doppler estimation,the atomic norm(AN)based on the multiple measurement vectors(MMV)model(MMV-AN)is used to manifest the signal sparsity in the continuous Doppler domain.At the same time,a reference signal compensation(RSC)method is presented to obtain highprecision delay estimation.Simulation results based on the OFDM signal show that the coarse-fine joint estimation method based on AN-RSC can obtain a more accurate estimation of target parameters compared with other algorithms.In addition,the proposed method also possesses computational advantages compared with the joint parameter estimation. | WANG Chujun WAN Xianrong YI Jianxin CHENG Feng | 2024 | Journal of Systems Engineering and Electronics2024，35，2： | 0 |
| 17 | PLSCR1 promotes apoptosis and clearance of retinal ganglion cells in glaucoma pathogenesis显示文摘Glaucoma is the leading cause of irreversible blindness worldwide.In the pathogen-esis of glaucoma,activated microglia can lead to retinal ganglion cells(RGCs)apoptosis and death,however,the molecular mechanisms remain largely unknown.We demonstrate that phospholipid scramblase 1(PLSCR1)is a key regulator promoting RGCs apoptosis and their clearance by microglia.As evidenced in retinal progenitor cells and RGCs of the acute ocular hypertension(AOH)mouse model,overexpressed PLSCR1 induced its translocation from the nucleus to the cytoplasm and cytomembrane,as well as elevated phosphatidylserine exposure and reactive oxygen species generation with subsequent RGCs apoptosis and death.These damages were effectively attenuated by PLSCR1 inhibition.In the AOH model,PLSCR1 led to an increase in M1 type microglia activation and retinal neuroinflammation.Upregulation of PLSCR1 resulted in strongly elevated phagocytosis of apoptotic RGCs by activated microglia.Taken together,our study provides important insights linking activated microglia to RGCs death in the glaucoma pathogenesis and other RGC-related neurodegenerative diseases. | Jingyi Luo Qing Lian Deliang Zhu Minglei Zhao Tingfang Mei Bizhi Shang Zeqiu Yang Chujun Liu Wenchang Xu Lan Zhou Keling Wu Xinqi Liu Yuhua Lai Fuxiang Mao Weihua Li Chengguo Zuo Kang Zhang Mingkai Lin Yehong Zhuo Yizhi Liu Lin Lu Ling Zhao | 2023 | Genes & Diseases2023，10，4： | 0 |
| 18 | Recovering the Shape of Planar Object Depicted by a Line Drawing under Axonometric Projection显示文摘A new approach is proposed for automatically creating B-rep models of a three-dimensional planar object from a line drawing depicting the object under orthographically axonometric projection. A new line parameterization that satisfies the uniqueness, boundedness and uniformness for representing lines in 2D and 3D space is given. According to the location relation between lines and planes of object depicted by the line drawing, some constraints about object’s 3D information are produced and a linear system based on those constraints is established. 3D information of a planar body can be obtained by solving the linear system. It is proved that, during the processing, there existed at least four degrees of freedom. It is more convenient to use information about lines and planes instead of points and planes for computer vision and intelligent CAD systems to interpret line drawings of planar objects. | CHUJun GAOMan-tun | 2005 | Computer Aided Drafting,Design and Manufacturing2005，15，1： | 0 |
| 19 | Broadband Pulsed Fiber Laser Generation with Topological Insulator: Towards the Mid-Infrared Regime显示文摘In recent years, topological insulators have aroused the attention of a great number of scientists due to their unique electronic structures and peculiar physical properties. Triggered by the similar electronic structures as graphene, the broadband nonlinear absorption properties of topological insulators were investigated. Moreover, the mode-locked or Q-switched fiber lasers based on topological insulators were realized for broadband operating wavelength. Here, we present an overview of the preparation, transferring, linear and nonlinear optical properties, and their applications of topological insulators in pulsed fiber lasers. The pulsed fiber lasers towards midinfrared regimes have been proposed. | Guobao Jiang Lili Miao Yu Chen Shunbin Lu Shuqing Chen Chujun Zhao Han Zhang Shuangchun Wen | 2015 | Journal of Electronic Science and Technology2015，13，4： | 0 |
| 20 | Reconfigurable and orthogonal stiffness-structure patterning of dynamically crosslinked amphigels显示文摘Patterning diversified properties and surface structure of polymer materials are of great importance toward their potential in biology,optics,and electronics.However,achieving both the patternability of stiffness and microstructure in a reconfigurable manner remains challenging.Here,we prepare amphigels crosslinked by dynamic disulfide bonds,which can be reversibly swollen by immiscible water or liquid paraffin.In the paraffingel form,the materials exhibited a high modulus of 130 MPa due to densified hydrogen bonds.Whereas swollen by water,the modulus fell over two orders of magnitude owing to the destruction of the hydrogen bonds.Via regionalized swelling of the solvents,well-controlled and rewritable soft/stiff mechanical patterns can be created.On the other hand,the dynamic exchange of the disulfide crosslinking enables mechanophoto patterning to fabricate sophisticated macrogeometries and microstructures.The reconfigurable stiffness-structure patterning can be manipulated orthogonally,which will create more application opportunities beyond conventional hydrogels and organogels. | Chen Yang Weizhong Zheng Chujun Ni Ye Li Di Chen Tao Xie Qian Zhao | 2024 | SmartMat2024，5，2： | 0 |
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