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Toward Rational Design of Carbon Nanodots with High Photothermal Efficiency for Tumor Photothermal Therapy

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Chinese Journal of Chemistry 2023年第16期41卷 1994-2001页

作者： Enshan Liu Jun Wu Tao Liang Bohan Zhang zikang tang Songnan Qu Joint Key Laborotory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoTaipaMacao SAR999078China Department of Physics and Chemistry Faculty of Science ond TechnologyUniversity of MacaoMacao SAR999078China MOE Frontier Science Centre for Precision Oncology University of MacaoMacao SAR999078China

Comprehensive Summary Carbon nanodots(CDs)with high photothermal performance are ideal candidates for tumor photothermal therapy(PTT).Herein,we investigated the photothermal performance of CDs synthesized from urea and citric acid via solvothermal method in dimethyl sulfoxide(DMSO)at different temperatures.Photothermal conversion efficiency(PCE)of up to 61.3%was obtained in the CDs synthesized at 150℃(150-CDs),which is much better than the CDs synthesized at 180℃(180-CDs).By analyzing the morphologies,chemical structures,and absorption spectra of these CDs,we found that the photothermal effect of the CDs was due to the lattice vibration of their carbonized cores.

关键词： Carbon dots Morphology control Photothermal efficiency Deep red Near-infrared Nanostructures Reaction mechanisms Sustainable chemistry

One step synthesis of efficient red emissive carbon dots and their bovine serum albumin composites with enhanced multi-photon fluorescence for in vivo bioimaging

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Light(Science & Applications) 2022年第5期11卷 955-968页

作者： Huiqi Zhang Gang Wang Zhiming Zhang Josh Haipeng Lei Tzu-Ming Liu Guichuan Xing Chu-Xia Deng zikang tang Songnan Qu Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoMacao 999078China Institute of Translational Medicine Faculty of Health SciencesUniversity of MacaoMacao 999078China MoE Frontiers Science Center for Precision Oncology University of MacaoMacao 999078China Cancer Center Faculty of Health SciencesUniversity of MacaoMacao 999078China

Efficient red emissive carbon dots(CDs)in aqueous solutions are very scarce for high performance bioimaging applications.In this work,we report a one-step solvothermal treatment to synthesize pure red emissive CDs(FA-CDs)from citric acid and urea in formic acid without complicated purification procedures.Photoluminescence quantum yield(PLQY)of 43.4%was observed in their dimethyl sulfoxide solutions.High PLQY up to 21.9%in aqueous solutions was achieved in their bovine serum albumin(BSA)composites(FA-CDs@BSA)with significantly enhanced multiphoton fluorescence.The strong surface electron-withdrawing structure of FA-CDs caused by the high content of C=O groups contributes for their pure red emission.Owing to the significantly enhanced single and multi-photon red fluorescence and enlarged particle sizes after composing with BSA,in vivo tumor imaging and two-photon fluorescence imaging of blood vessels in mouse ear have been realized via intravenous injection of FA-CDs@BSA aqueous solutions.

关键词： photon pure synthesis

Direct stamping multifunctional tactile sensor for pressure and temperature sensing

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Nano Research 2022年第4期15卷 3614-3620页

作者： Binghao Liang Bingfang Huang Junkai He Rongliang Yang Chengchun Zhao Bo-Ru Yang Anyuan Cao zikang tang Xuchun Gui State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-sen UniversityGuangzhou 510275China Department of Materials Science and Engineering College of EngineeringPeking UniversityBeijing 100871China Institute of Applied Physics and Materials Engineering University of MacaoAvenida da UniversidadeTaipaMacaoChina

Flexible and wearable sensors have broad application prospects in health monitoring and artificial intelligence.Many different single-functional sensing devices have been developed in recent years,such as pressure sensors and temperature sensors.However,it is still a great challenge to design and fabricate tactile sensors with multiple sensing functions.Herein,we propose a simple direct stamping method for the fabrication of multifunctional tactile sensors.It can detect pressure and temperature stimuli signals simultaneously.This pressure/temperature sensor possesses high sensitivity(0.67 kPa^(-1)),large linear range(0.75-5 kPa),and fast response speed(15.6 ms)in pressure sensing.It also has a high temperature sensitivity(1.41%/℃)and great linearity(0.99)for temperature sensing in the range of-30 to 30℃.All these excellent performances indicate that this pressure/temperature sensor has great potential in applications for artificial intelligence and health monitoring.

关键词： pressure sensing temperature sensing carbon nanotube direct stamping

Ultra-strong phosphorescence with 48% quantum yield from grinding treated thermal annealed carbon dots and boric acid composite

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SmartMat 2022年第2期3卷 260-268页

作者： Qijun Li Zhenxiao Zhao Shuai Meng Yuchen Li Yunyang Zhao Bohan Zhang zikang tang Jing Tan Songnan Qu Institute for Energy Research Institute of Micro-nano Optoelectronics and Terahertz TechnologySchool of Mechanical EngineeringJiangsu UniversityZhenjiangChina Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoMacaoChina

Metal-free room-temperature phosphorescence(RTP)materials are of great significance for many applications;however,they usually exhibit low efficiency and weak intensity.This article reports a new strategy for the preparation of a high-efficiency and strong RTP materials from crystalline thermal-annealed carbon dots(CDs)and boric acid(BA)composite(g-t-CD@BA)through grinding-induced amorphous to crystallization transition.Amorphous thermal-annealed CDs and BA composite(t-CD@BA)is prepared following a thermal melting and super-cooling route,where the CDs are fully dispersed in molten BA liquid and uniformly frozen in an amorphous thermal annealed BA matrix after super-cooling to room temperature.Upon grinding treatment,the fracture and fragmentation caused by grinding promote the transformation of the high-energy amorphous state to the lower energy crystalline counterparts.As a result,the CDs are uniformly in situ embedded in the BA crystal matrix.This method affords maximum uniform embedding of the CDs in the BA crystals,decreases nonradiative decay,and promotes intersystem crossing by restraining the free vibration of the CDs,thus producing strong RTP materials with the highest reported phosphorescence quantum yield(48%).Remarkably,RTP from g-t-CD@BA powder is strong enough to illuminate items with a delay time exceeding 9 s.

关键词： boric acid carbon dots crystalline state grinding treatment room-temperature phosphorescence

Polyetherimide functionalized carbon dots with enhanced red emission in aqueous solution for bioimaging

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Chinese Chemical Letters 2022年第8期33卷 4111-4115页

作者： Liming Wang Bingzhe Wang Enshan Liu Yunyang Zhao Bingchen He Chunfei Wang Guichuan Xing zikang tang Yinning Zhou Songnan Qu Institute of Applied Physics and Materials Engineering University of MacaoMacao SARChina Cancer Centre and Centre of Reproduction Development and AgingFaculty of Health SciencesUniversity of MacaoMacao SARChina

Red emissive carbon dots(CDs)are highly desired for biological applications.However,serious luminescence quenching of red emissive CDs in aqueous solution greatly hinders their application in high performance biological imaging.Herein,we reported a facile strategy to realize enhanced red emission of CDs in aqueous solution by surface modification with polyetherimide(PEI)via microwave heating method.High photoluminescence quantum yield(PLQY)of 25%was realized from the PEI functionalized CDs(CDs@PEI)in aqueous solution.The proposed PEI functionalization strategy not only protects the red emission against water molecules quenching,but also reverses the surface charges from negativity to positivity to promote cellular uptake of CDs,leading to clear cell imaging in red fluorescence region.More important,CDs@PEI exhibits much better photostability than commercial red emissive dye(MitoT racker red)in cell fluorescent imaging.Potential application of CDs@PEI on fast staining of cells for clonogenic assay has also been demonstrated.

关键词： Carbon dots(CDs) Biological imaging Red emission Surface passivation Microwave heating

Synergistically boosting the elementary reactions over multiheterogeneous ordered macroporous Mo2C/NC-Ru for highly efficient alkaline hydrogen evolution

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Carbon Energy 2022年第5期4卷 856-866页

作者： Kaixi Wang Shuo Wang Kwan San Hui Haixing Gao Duc Anh Dinh Chengzong Yuan Chenyang Zha Zongping Shao zikang tang Kwun Nam Hui Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoTaipaMacao SARChina School of Engineering Faculty of ScienceUniversity of East AngliaNorwichUK NTT Hi-Tech Institute Nguyen Tat Thanh UniversityHo Chi Minh CityVietnam State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjingChina WA School of Mines:Minerals Energy and Chemical Engineering(WASM-MECE)Curtin UniversityPerthWestern AustraliaAustralia

Simultaneously enhancing the reaction kinetics,mass transport,and gas release during alkaline hydrogen evolution reaction(HER)is critical to minimizing the reaction polarization resistance,but remains a big challenge.Through rational design of a hierarchical multiheterogeneous three-dimensionally(3D)ordered macroporous Mo_(2)C-embedded nitrogen-doped carbon with ultrafine Ru nanoclusters anchored on its surface(OMS Mo_(2)C/NC-Ru),we realize both electronic and morphologic engineering of the catalyst to maximize the electrocatalysis performance.The formed Ru-NC heterostructure shows regulative electronic states and optimized adsorption energy with the intermediate H*,and the Mo_(2)C-NC heterostructure accelerates the Volmer reaction due to the strong water dissociation ability as confirmed by theoretical calculations.Consequently,superior HER activity in alkaline solution with an extremely low overpotential of 15.5 mV at 10 mAcm^(−2)with the mass activity more than 17 times higher than that of the benchmark Pt/C,an ultrasmall Tafel slope of 22.7 mV dec−1,and excellent electrocatalytic durability were achieved,attributing to the enhanced mass transport and favorable gas release process endowed from the unique OMS Mo_(2)C/NC-Ru structure.By oxidizing OMS Mo_(2)C/NC-Ru into OMS MoO_(3)-RuO_(2)catalyst,it can also be applied as efficient oxygen evolution electrocatalyst,enabling the construction of a quasi-symmetric electrolyzer for overall water splitting.Such a device's performance surpassed the state-of-the-art Pt/C||RuO2 electrolyzer.This study provides instructive guidance for designing 3D-ordered macroporous multicomponent catalysts for efficient catalytic applications.

关键词： heterostructure hydrogen evolution reaction molybdenum carbide ordered macroporous structure ruthenium nanoparticle synergistic effect

Ultrathin, Lightweight, and Flexible CNT Buckypaper Enhanced Using MXenes for Electromagnetic Interference Shielding

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Nano-Micro Letters 2021年第4期13卷 208-220页

作者： Rongliang Yang Xuchun Gui Li Yao Qingmei Hu Leilei Yang Hao Zhang Yongtao Yao Hui Mei zikang tang State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-Sen UniversityGuangzhou 510275People’s Republic of China Science and Technology on Thermostructural Composite Materials Laboratory School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072ShaanxiPeople’s Republic of China Instrumental Analysis and Research Center(IARC) Sun Yat-Sen UniversityGuangzhou 510275People’s Republic of China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150080People’s Republic of China Institute of Applied Physics and Materials Engineering University of MacaoTaipa 999078MacaoPeople’s Republic of China

Lightweight,flexibility,and low thickness are urgent requirements for next-generation high-performance electromagnetic interference(EMI)shielding materials for catering to the demand for smart and wearable electronic devices.Although several efforts have focused on constructing porous and flexible conductive films or aerogels,few studies have achieved a balance in terms of density,thickness,flexibility,and EMI shielding effectiveness(SE).Herein,an ultrathin,lightweight,and flexible carbon nanotube(CNT)buckypaper enhanced using MXenes(Ti3C2Tx)for high-performance EMI shielding is synthesized through a facile electrophoretic deposition process.The obtained Ti3C2Tx@CNT hybrid buckypaper exhibits an outstanding EMI SE of 60.5 dB in the X-band at 100μm.The hybrid buckypaper with an MXene content of 49.4 wt%exhibits an EMI SE of 50.4 dB in the X-band with a thickness of only 15μm,which is 105%higher than that of pristine CNT buckypaper.Furthermore,an average specific SE value of 5.7×10^(4) dB cm^(2) g^(−1) is exhibited in the 5-μm hybrid buckypaper.Thus,this assembly process proves promising for the construction of ultrathin,flexible,and high-performance EMI shielding films for application in electronic devices and wireless communications.

关键词： Carbon nanotube MXene Buckypaper Electromagnetic interference shielding

Direct Patterning of Carbon Nanotube via Stamp Contact Printing Process for Stretchable and Sensitive Sensing Devices

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Nano-Micro Letters 2019年第4期11卷 619-629页

作者： Binghao Liang Zian Zhang Wenjun Chen Dongwei Lu Leilei Yang Rongliang Yang Hai Zhu zikang tang Xuchun Gui State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-sen UniversityGuangzhou 510275People’s Republic of China State Key Laboratory of Optoelectronic Materials and Technologies School of PhysicsSun Yat-Sen UniversityGuangzhou 510275People’s Republic of China Institute of Applied Physics and Materials Engineering University of MacaoAvenida da UniversidadeTaipaMacaoPeople’s Republic of China

Flexible and wearable sensing devices have broad application prospects in bio-monitoring such as pulse measurement,motion detection and voice recognition.In recent years,many significant improvements had been made to enhance the sensor’s performance including sensitivity,flexibility and repeatability.However,it is still extremely complicated and difficult to prepare a patterned sensor directly on a flexible substrate.Herein,inspired by typography,a lowcost,environmentally friendly stamping method for the mass production of transparent conductive carbon nanotube(CNT)film is proposed.In this dry transfer strategy,a porous CNT block was used as both the seal and the ink;and Ecoflex film was served as an object substrate.Welldesigned CNT patterns can be easily fabricated on the polymer substrate by engraving the target pattern on the CNT seal before the stamping process.Moreover,the CNT film can be directly used to fabricate ultrathin(300μm)strain sensor.This strain sensor possesses high sensitivity with a gauge factor(GF)up to 9960 at 85%strain,high stretchability(>200%)and repeatability(>5000 cycles).It has been used to measure pulse signals and detect joint motion,suggesting promising application prospects in flexible and wearable electronic devices.

关键词： Carbon nanotube Strain sensor Dry transfer Stamp contact printing process

Full-color-tunable phosphorescence of antimony-doped lead halide single crystal

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npj Flexible Electronics 2022年第1期6卷 613-620页

作者： Jin-Feng Liao Zhipeng Zhang Bingzhe Wang zikang tang Guichuan Xing Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoAvenida da UniversidadeTaipaMacao 999078China

Although multiple emissive phosphors are of great fundamental interest and practical importance,it is still challenging to achieve full-color tunable luminescence in a single-component material.Herein,we present an antimony-doped lead halide single crystal(C10NH22)2PbBr4:Sb3+with widely tunable red/green/blue/white luminescence.Extrinsic Sb3+dopants provide host another active sites to capture photo-generated excitons,thus triggering blue/red dual emission.Moreover,a reversible thermal-induced phase transition transforms blue/red emission into green/red dual emission.Both two phases exhibit intriguing excitation-wavelength dependent emission,affording a whole color gamut covering the red-green-blue(RGB)color triangle on the CIE 1931 diagram.Experimental and theoretical calculation studies reveal two emitters work independently,which paves the way for the multimode optical control and promotes the development of multifunctional luminescent materials.

关键词： tunable dopant crystal