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| 1 | One-step laser induced conversion of a gelatin-coated polyimide film into graphene:Tunable morphology,surface wettability and microsupercapacitor applications显示文摘Latest advances have witnessed the laser induction process on polyimide(PI)films for the formation of porous graphene.Herein,a fully converted graphene film was prepared by Nd:YAG laser scribing a gelatin coated PI film.It was found that the gelatin played the role of'shield'well in absorbing intense laser impact and benefit for the surface morphology modulation.Laser treatment lower than a critical fluence point of~4.00 J mm^(-2) contributed to a crater-like surface morphology due to the dispersed nature of Nd:YAG laser beam.By tuning laser fluence above the threshold,carbonized surface turned into continuous morphology.A fluid dynamics process accompanied by outgassing occurred during the carbonization,and the surface morphology gradually varied from stretched droplets to porous strips and finally to amorphous porous structures.The morphology evolution in combination with surface chemistry is responsible for the significant wettability transition from superhydrophobic to superhydrophilic,and a Janus superhydrophobic/superhydrophilic surface wettability was achieved under a laser fluence of~8.00 J mm^(-2).Eventually,microsupercapacitors(MSCs)were fabricated to show the great potential of our prepared graphene in flexible electronics. | WANG WenTao LU LongSheng XIE YingXi LI ZeHong WU WeiBin LIANG RongXuan TANG Yong | 2021 | Science China(Technological Sciences)2021，64，5： | 2 |
| 2 | NOVEL SPECTRUM SENSING METHOD BASED ON THE SPATIAL SPECTRUM FOR COGNITIVE RADIO SYSTEMS显示文摘Spectrum sensing is the key problem for Cognitive Radio(CR) systems.A method based on the Peak-to-Average Amplitude-Ratio(PAAR) of the Spatial Spectrum(SS) of the received signals is proposed to sense the available spectrum for the cognitive users with the help of the multiple antennas at the receiver of the cognitive users.The greatest advantage of the new method is that it requires no information of the noise power and is free of the noise power uncertainty.Both the simulation and the analytical results show that the proposed method is robust to noise uncertainty,and greatly outperform the classical Energy Detector(ED) method. | Lu Guangyue Wang Yingxi Xie Kai Yang Xiaoni | 2010 | Journal of Electronics(China)2010，27，5： | 2 |
| 3 | Controlling the laser induction and cutting process on polyimide films for kirigami-inspired supercapacitor applications显示文摘The recently emerging laser-induced graphene(LIG)technology,with one-step processing and designable features,has been widely used in the fabrication of wearable/portable electronics.Herein,by taking inspiration from kirigami,we designed a stretchable supercapacitor(SC)step by step through controlling laser induction and cutting process on the polyimide(PI)film,with the use of one single CO_(2) laser source.Firstly,the carbonized basic geometric units of lines were produced on PI films to investigate the processing-structure relationships.Then,the complex photothermal conversion and heat transfer progress involved in the carbonized process were simulated by a photothermal model.Both experimental and theoretical results suggested that the laser power,scan rate and focus condition have great influence on the size,shape and morphology of the carbonized lines.Finally,we optimized the parameters of laser induction and cutting process to fabricate the kirigami-inspired SCs with reliable electrochemical properties and editable mechanical flexibility,showing great potential in the field of flexible electronics. | WANG WenTao LU LongSheng XIE YingXi WU WeiBin LIANG RongXuan LI ZeHong TANG Yong | 2021 | Science China(Technological Sciences)2021，64，3： | 2 |
| 4 | Novel Spectrum Sensing MethodBased on the SpatialSpectrum for Cognitive Radio Systems显示文摘 | Lu Guanyue Wang Yingxi Xie Kai Yang Xiaoni | | 0，，： | 1 |
| 5 | Selective dissolution of the silver component in colloidal Au and Ag multilayers: a facile way to prepare nanoporous gold film materials显示文摘 | LU Yingxi WANG Qifeng SUN Junqi | 2005 | Langmuir2005，21，： | 1 |
| 6 | Haploidentical hematopoietic stem cell transplantation may improve long-term survival for children with high-risk T-cell acute lymphoblastic leukemia in first complete remission显示文摘Background: The role of allogeneic hematopoietic stem cell transplantation (allo-HSCT) in children with high-risk (HR) T-cell acute lymphoblastic leukemia (T-ALL) in first complete remission (CR1) is still under evaluation. Moreover, relapse is the main factor affecting survival. This study aimed to explore the effect of allo-HSCT (especially haploidentical HSCT [haplo-HSCT]) on improving survival and reducing relapse for HR childhood T-ALL in CR1 and the prognostic factors of childhood T-ALL in order to identify who could benefit from HSCT.Methods: A total of 74 newly diagnosed pediatric T-ALL patients between January 1, 2012 and June 30, 2018 were enrolled in this retrospective study. Patients were stratified into the low-risk chemotherapy cohort (n = 16), HR chemotherapy cohort (n = 31), and HR transplant cohort (n = 27). Characteristics, survival outcomes, and prognostic factors of all patients were then analyzed.Results: Patient prognosis in the HR chemotherapy cohort was significantly worse than that in the low-risk chemotherapy cohort (5-year overall survival [OS]: 58.5%vs. 100%,P = 0.003;5-year event-free survival [EFS]: 54.1%vs. 83.4%,P = 0.010;5-year cumulative incidence of relapse [CIR]: 45.2%vs. 6.3%,P = 0.011). In HR patients, allo-HSCT improved the 5-year EFS and CIR compared to that of chemotherapy (5-year EFS: 80.1%vs. 54.1%,P = 0.041;5-year CIR: 11.6%vs. 45.2%,P = 0.006). The 5-year OS was higher in the HR transplant cohort than that in the HR chemotherapy cohort (81.0%vs. 58.5%,P = 0.084). Minimal residual disease re-emergence was an independent risk factor for 5-year OS, EFS, and CIR;age ≥10 years was an independent risk factor for OS and EFS;and high white blood cell count was an independent risk factor for EFS and CIR.Conclusion: Allo-HSCT, especially haplo-HSCT, could effectively reduce relapse of children with HR T-ALL in CR1. | Zhang Yongzhan Bai Lu Cheng Yifei Lu Aidong Wang Yu Wu Jun Zhang Xiaohui Zuo Yingxi Xu Lanping Jia Yueping Huang Xiaojun Zhang Leping | 2022 | Chinese Medical Journal2022，，8： | 1 |
| 7 | An easy-to-implement method for fabricating superhydrophobic surfaces inspired by taro leaf显示文摘An easy-to-implement method by which to fabricate superhydrophobic surfaces inspired taro leaf was successfully applied on316 L stainless steel via combining nanosecond laser(NL)processing and spin-coating techniques.The laser-textured surface composed of microscale frameworks and central bumps was fabricated by NL processing based on properly designed biomimetic patterns,and a layer of nanoscale carbon black/polydimethylsiloxane(CB/PDMS)particles was covered on it by spin-coating.The effect of pattern parameters(i.e.,the inscribed circle radius of framework and the radius of central bump)on wettability of biomimetic surface was investigated.All as-prepared biomimetic surfaces with micro-nano hierarchical structures showed excellent superhydrophobicity with the water contact angle of~155°and contact angle hysteresis of~2°.By comparing the untreated surface,the wetting behavior and evaporation mode of the biomimetic surface occurred an obvious transformation.Meanwhile,experiments indicated that the biomimetic surface not only had liquid-repelling and self-cleaning functions,but also maintained remarkable mechanical robustness and superhydrophobic durability.The method is efficient for fabricating biomimetic superhydrophobic surfaces applied to liquid-repelling,evaporation-transforming and self-cleaning fields. | LI KaiKai LEI Jiang XIE YingXi LU LongSheng ZHANG ShaoHui ZHOU PeiYang LIANG RongXuan WAN ZhenPing TANG Yong | 2021 | Science China(Technological Sciences)2021，64，12： | 0 |
| 8 | Scorpion-inspired dual-bionic,microcrack-assisted wrinkle based laser induced graphene-silver strain sensor with high sensitivity and broad working range for wireless health monitoring system显示文摘Scorpions,through ruthless survival of the fittest,evolve the unique ability to quickly locate and hunt prey with slit receptors near the leg joints and a sharp sting on the multi-freedom tail.Inspired by this fantastic creature,we herein report a dual-bionic strategy to fabricate microcrack-assisted wrinkle strain sensor with both high sensitivity and stretchability.Specifically,laserinduced graphene(LIG)is transferred from polyimide film to Ecoflex and then coated with silver paste using the casting-andpeeling and prestretch-and-release methods.The shape-adaptive and long-range ordered geometry(e.g.,amplitude and wavelength)of dual-bionic structure is prestrain-tuned to optimize the superfast response time(~76 ms),high sensitivity(gauge factor=223.6),broad working range(70%–100%),and good reliability(>800 cycles)of scorpion-inspired strain sensor,outperforming many LIG-based materials and other bionic sensors.The alternate reconnect/disconnect behaviors of slit-organlike microcracks in the mechanical weak areas initiate tremendous resistance changes,whereas the scorpion-tail-like wrinkles act as a“bridge”connecting the adjacent LIG resistor units,enabling reversible resilience and unimpeded electrical linkages over a wide strain range.Combined with the self-developed miniaturized,flexible,and all-in-one wireless transmission system,a variety of scenarios such as large body movements,tiny pulse,and heartbeat are real-time monitored via bluetooth and displayed in the client-sides,revealing a huge promise in future wearable electronics. | Wentao Wang Longsheng Lu Xiaoyu Lu Zhanbo Liang Honghao Lin Zehong Li Xiaohua Wu Lihui Lin Yingxi Xie | 2023 | Nano Research2023，16，1： | 0 |
| 9 | Laser-induced jigsaw-like graphene structure inspired by Oxalis corniculata Linn.leaf显示文摘The laser scribing of polyimide(PI, Kapton) film is a new, simple and effective method for graphene preparation. Moreover,the superhydrophobic surface modification can undoubtedly widen the application fields of graphene. Herein, inspired by the hydrophobic and self-cleaning properties of natural Oxalis corniculata Linn. leaves, we propose a novel bionic manufacturing method for superhydrophobic laser-induced graphene(LIG). By tailoring the geometric parameters(size, roughness and height/area ratio) and chemical composition, the three-dimensional(3D) multistage LIG, i.e., with micro-jigsaw-like and porous structure, can deliver a static water contact angle(WCA) of 153.5° ± 0.6°, a water sliding angle(WSA) of 2.5° ±0.5°, and great superhydrophobic stability lasting for 100 days(WCAs ≈ 150°). This outstanding water repellency is achieved by the secondary structure of jigsaw-like LIG, a porous morphology that traps air layers at the solid–liquid interface. The robust self-cleaning and anti-stick functions of 3D bionic and multistage LIG are demonstrated to confirm its great potential in wearable electronics. | Wentao Wang Longsheng Lu Xiaoyu Lu Zhanbo Liang Biao Tang Yingxi Xie | 2022 | Bio-Design and Manufacturing2022，5，4： | 0 |
| 10 | PuHox52 promotes coordinated uptake of nitrate,phosphate, and iron under nitrogen deficiency in Populus ussuriensis显示文摘It is of great importance to better understand how trees regulate nitrogen(N) uptake under N deficiency conditions which severely challenge afforestation practices, yet the underlying molecular mechanisms have not been well elucidated. Here,we functionally characterized PuHox52, a Populus ussuriensis HD-ZIP transcription factor, whose overexpression greatly enhanced nutrient uptake and plant growth under N deficiency. We first conducted an RNA sequencing experiment to obtain root transcriptome using PuHox52-overexpression lines of P. ussuriensis under low N treatment. We then performed multiple genetic and phenotypic analyses to identify key target genes of PuHox52 and validated how they acted against N deficiency under PuHox52 regulation.PuHox52 was specifically induced in roots by N deficiency, and overexpression of PuHox52promoted N uptake, plant growth, and root development. We demonstrated that several nitrate-responsive genes(PuNRT1.1, PuNRT2.4,PuCLC-b, PuNIA2, PuNIR1, and PuNLP1),phosphate-responsive genes(PuPHL1A and PuPHL1B), and an iron transporter gene(PuIRT1) were substantiated to be direct targets of PuHox52. Among them, PuNRT1.1, PuPHL1A/B, and PuIRT1 were upregulated to relatively higher levels during PuHox52-mediated responses against N deficiency in PuHox52-overexpression lines compared to WT. Our study revealed a novel regulatory mechanism underlying root adaption to N deficiency where PuHox52 modulated a coordinated uptake of nitrate, phosphate, and iron through 'PuHox52-PuNRT1.1', 'PuHox52-PuPHL1A/PuPHL1B', and'PuHox52-PuIRT1' regulatory relationships in poplar roots. | Ming Wei Mengqiu Zhang Jiali Sun Ying Zhao Solme Pak Miaomiao Ma Yingxi Chen Han Lu Jingli Yang Hairong Wei Yuhua Li Chenghao Li | 2023 | Journal of Integrative Plant Biology2023，65，3： | 0 |
| 11 | Wearable multilead ECG sensing systems using on-skin stretchable and breathable dry adhesives显示文摘Electrocardiogram(ECG)monitoring is used to diagnose cardiovascular diseases,for which wearable electronics have attracted much attention due to their lightweight,comfort,and long-term use.This study developed a wearablemultilead ECG sensing system with on-skin stretchable and conductive silver(Ag)-coated fiber/silicone(AgCF-S)dry adhesives.Tangential and normal adhesion to pigskin(0.43 and 0.20 N/cm2,respectively)was optimized by the active control of fiber density and mixing ratio,resulting in close contact in the electrode–skin interface.The breathableAgCF-S dry electrodewas nonallergenic after continuous fit for 24 h and can be reused/cleaned(>100 times)without loss of adhesion.The AgCF encapsulated inside silicone elastomers was overlapped to construct a dynamic network under repeated stretching(10%strain)and bending(90°)deformations,enabling small intrinsic impedance(0.3,0.1 Hz)and contact impedance variation(0.7 k)in high-frequency vibration(70 Hz).All hard/soft modules of the multilead ECG system were integrated into lightweight clothing and equipped with wireless transmission for signal visualization.By synchronous acquisition of I–III,aVR,aVL,aVF,and V4 lead data,the multilead ECG sensing system was suitable for various scenarios,such as exercise,rest,and sleep,with extremely high signal-to-noise ratios. | Yingxi Xie Longsheng Lu Wentao Wang Huan Ma | 2024 | Bio-Design and Manufacturing2024，7，2： | 0 |
| 12 | Superhydrophobic Purple Orchid Leaves:Variation in Surface Morphology During the Vegetation Stages Leading to Diversity in Wettability显示文摘Learning hydrophobic phenomena from nature is always a promising approach to design the superhydrophobic surface.Purple orchid leaf which processes superhydrophobicity is an ideal plant model,and through mimicking its structure,the surface with excellent hydrophobicity is able to be obtained.However,the unclear of the diversity in wettability during the different vegetation stages and the absence of its relation to the surface morphology limits the further enhancement of the inspired structure.Here,we analyze the wettability difference as the leaf grows from tender to mature and then to senescent.Combining with the variation of surface morphology and chemical composition,the well-developed micro-scale basic unit bumps with dense nano-scale waxy layer on the surface are proven to be responsible for the best hydrophobicity of the mature leaf.The presence of the undeveloped or damaged micro-nano hierarchical structure reduces the formation of air pockets at the interface,leading to the decrease of the wettability for leaves at other stages.Moreover,by fabricating artificial leaves,the nano-waxy layer is proved to be more effective than that of the micro-bumps on the surface wettability.The results of study are of a great significance for guiding the design and fabrication of plant-inspired bionic superhydrophobic surface. | Longsheng Lu Guoxiang Jiang Kaikai Li Yingxi Xie Jiao Gao | 2023 | Journal of Bionic Engineering2023，20，6： | 0 |
| 13 | Investigation on forward and backward transfer process during carbon fiber/epoxy composites dry-sliding against iron alloy显示文摘Carbon fiber reinforced polymer(CFRP)composites with high load-bearing capacity are currently ideal materials in tribological load systems.One of the unique features during the friction process of CFRP/metal is the in-situ formation of an ultrathin and uniform transfer film on the metal surface,and the related initial/transfer mechanism is very important but still unclear.Recent studies mainly focus on the one-way transfer process of CFRP to the metal surface,that is,forward transfer;whereas another easily overlooked issue is that the metal material also transfers backward to the CFRP surface.Herein,we firstly prepared carbon fiber/epoxy resin composites(CF/EP)by the hot-pressing method and then carried out friction tests with iron alloy as the control material.The underlying mechanism of the forward/backward transfer process is revealed by controlling the morphological evolution and iron content of the transfer film on worn CF/EP.According to the variation law of friction coefficient with time,the interfacial friction is divided into three different stages,among which the behaviours of“micro-convex contact”and“epoxy exfoliation”occur throughout the whole procedure.We believe this work could provide a meaningful reference for studying the friction behaviour and mechanism,especially the forward and backward transfer between composites/metals,and further broaden its emerging applications in future energy,aerospace and rail transportation. | LU LongSheng LI ZeHong FANG HeZhengZi XIE YingXi WANG WenTao | 2022 | Science China(Technological Sciences)2022，65，11： | 0 |
| 14 | Novel CD123×CD33 bicistronic chimeric antigen receptor(CAR)-T therapy has potential to reduce escape from single-target CAR-T with no more hematotoxicity显示文摘Dear Editor,Antigen escape is responsible for resistance[1]or disease relapse[2]from single-target chimeric antigen receptor(CAR)-T therapy.Dual-target CAR-T therapy has the potential to overcome the escape problem.However,the efficacy and safety assessment of dual-target CAR-T therapy in treating acute myeloid leukemia(AML)need further investigation.Tandem CAR-T therapy has been widely used in research and clinic.However,clustering of two connected single-chain variable fragments(scFvs)[3]and the inappropriate conjugation distance[4]pose a risk of damaging tandem CAR-T cells’function. | Zhenzhen Wang Yang Lu Yu Liu Junli Mou Xiaoyu Liu Manling Chen Ying Wang Yingxi Xu Qing Rao Haiyan Xing Kejing Tang Zheng Tian Bing Wang Wei Qi Min Wang Shaowei Qiu Dongsheng Xiong Jianxiang Wang | 2023 | Cancer Communications2023，43，10： | 0 |
| 15 | Capillary Performance of Nanoporous Aluminum Braided Wicks Prepared by Anodic Oxidation显示文摘With the rapid development of two-phase heat exchangers,the further improvement of the capillary performance of their internal wick faces a great challenge.As an important technology in the surface treatment of aluminum alloys,anodic oxidation has been widely used to develop various functional nanostructures.In this study,nanopores with diameters of 30–40 nm were fabricated on the surface of aluminum fibers through anodic oxidation under an oxalic acid system.Results showed that anodizing increased the specific surface area of the aluminum braid by 163 times,and changed its surface wettability from hydrophobic to superhydrophilic.A significant reduction in the effective capillary radius can substantially increase the capillary force of aluminum braids on the basis of capillary theory.Therefore,the nanoporous aluminum braids can be used as a novel wick in the vapor chamber to improve its capillary performance.Capillary rate-of-rise tests with ethanol and acetone were performed to characterize the capillary of this novel wick structure.Infrared thermal imaging was utilized to monitor the capillary rise of aluminum braided wicks.The capillary force of the anodized wicks was greater than that of a normal wick,and the maximum capillary rise height was 81 mm.The nanoporous aluminum braided wicks prepared by anodizing could be applied in heat transfer. | Fei Gao Longsheng Lu Xiaokang Mei Yu-Xiang Yu Shitong Chai Yang Shen Yingxi Xie | 2022 | Nanomanufacturing and Metrology2022，5，4： | 0 |
| 16 | Boost photothermal theranostics via self-assembly-induced crystallization(SAIC)显示文摘Owing to the intrinsic advantages of spatiotemporal selectivity,photothermal theranostics have become the advancing edge of precision medicine for cancer.Developing photothermal transduction agents(PTAs)with near-infrared(NIR)absorption,high photothermal conversion efficiency,robust photothermal stability,and good accumulation in tumors,is particularly valuable.Herein,we report a new concept,self-assembly-induced crystallization(SAIC),which can serve as a mechanism that dramatically boosts photothermal behaviors of PTA in NIR region.As a proof of concept,three heptamethine cyanine molecules with internal degrees of freedom(geometry and intramolecular interaction)are designed to fine-tune their crystallinity.Notably,Cy7-TCF-EMBI molecules with rigid and planar skeletons self-assemble into a crystalline state to maximize their packing density and improve the charge transfer,both of which contribute to nonradiative decay for energy dissipation as heat.The high packing density also renders an ideal scaffold for controlling intermolecular interactions to exhibit better photothermal stability,and endows an anisotropic three-dimensional architecture for passive tumor targeting.This“SAIC”strategy may offer a conceptually novel,practically simple but effective approach to unveil the structure–property relationship that could provide some general rules in rational design of PTAs,and paves the way for a next generation of supramolecular medicine for photothermal theranostics. | Xueluer Mu Fapu Wu Ying Tang Rui Wang Yajie Li Kaixuan Li Chunfeng Li Yingxi Lu Xianfeng Zhou Zhibo Li | 2022 | Aggregate2022，3，5： | 0 |
| 17 | Cutting performance of surgical electrodes by constructing bionic microstriped structures显示文摘Surgical electrodes rely on thermal effect of high-frequency current and are a widely used medical tool for cutting and coagulating biological tissue.However,tissue adhesion on the electrode surface and thermal injury to adjacent tissue are serious problems in surgery that can affect cutting performance.A bionic microstriped structure mimicking a banana leaf was constructed on the electrode via nanosecond laser surface texturing,followed by silanization treatment,to enhance lyophobicity.The effect of initial,simple grid-textured,and bionic electrodes with different wettabilities on tissue adhesion and thermal injury were investigated using horizontal and vertical cutting modes.Results showed that the bionic electrode with high lyophobicity can effectively reduce tissue adhesion mass and thermal injury depth/area compared with the initial electrode.The formation mechanism of adhered tissue was discussed in terms of morphological features,and the potential mechanism for antiadhesion and heat dissipation of the bionic electrode was revealed.Furthermore,we evaluated the influence of groove depth on tissue adhesion and thermal injury and then verified the antiadhesion stability of the bionic electrode.This study demonstrates a promising approach for improving the cutting performance of surgical electrodes. | Kaikai LI Longsheng LU Huaping CHEN Guoxiang JIANG Huanwen DING Min YU Yingxi XIE | 2023 | Frontiers of Mechanical Engineering2023，18，1： | 0 |
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