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Core-Shell Semiconductor-Graphene Nanoarchitectures for Efficient Photocatalysis:State of the Art and Perspectives

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Nano-micro Letters 2024年第12期16卷 553-588页

作者： Jinshen Lan Shanzhi Qu Xiaofang Ye Yifan Zheng Mengwei Ma Shengshi Guo Shengli Huang Shuping Li Junyong Kang Engineering Research center of micro-Nano Optoelectronic materials and devices Ministry of EducationFujian Key Laboratory of Semiconductor Materials and ApplicationsCI Center for OSEDDepartment of PhysicsXiamen UniversityXiamen 361005People’s Republic of China

Semiconductor photocatalysis holds great promise for renewable energy generation and environment remediation,but generally suffers from the serious drawbacks on light absorption,charge generation and transport,and structural stability that limit the *** core-shell semiconductorgraphene(CSSG)nanoarchitectures may address these issues due to their unique structures with exceptional physical and chemical *** review explores recent advances of the CSSG nanoarchitectures in the photocatalytic *** starts with the classification of the CSSG nanoarchitectures by the ***,the construction methods under internal and external driving forces were introduced and compared with each ***,the physicochemical properties and photocatalytic applications of these nanoarchitectures were discussed,with a focus on their role in *** ends with a summary and some perspectives on future development of the CSSG nanoarchitectures toward highly efficient photocatalysts with extensive *** harnessing the synergistic capabilities of the CSSG architectures,we aim to address pressing environmental and energy challenges and drive scientific progress in these fields.

关键词： Core-shell semiconductor-graphene Nanoarchitecture Photocatalysis Driving force Interface

Self-shrinking supramolecular nanoparticles syndicate energy suppression and NIR-II mild photothermal amplification of mitochondrial oxidative stress for breast cancer therapy

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Nano Research 2024年第5期17卷 4314-4328页

作者： Hongmei Liu Jiming Xu Mengjie Ye Hengbo Zhang Linlin Han Jingting Wang Peng Xue Yuejun Kang Zhigang Xu Key Laboratory of Luminescence analysis and Molecular Sensing Ministry of EducationSchool of Materials and Energy&Chongqing Engineering Research Center for Micro-Nano Biomedical Materials and DevicesSouthwest UniversityChongqing 400715China Key Laboratory of Laser Technology and Optoelectronic Functional materials of Hainan Province College of Chemistry and Chemical EngineeringHainan Normal UniversityHaikou 571158China Yibin Academy of Southwest University Yibin 644000China

Photothermal therapy(PTT)may lead to healthy tissue damage,tumor metastasis,and recurrence,which makes mild photothermal therapy(mild PTT)stand ***,overcoming heat resistance,insufficient therapeutic effect,and poor photothermal conversion efficiency has become new ***,we report a dynamic supramolecular nanocarrier formed from amide-sericin and aldehyde-polyhydroxy glucan(denoted as SDA),the loose cavity of which can be filled by using the pharmaceutical combination of lonidamine(LND)and NIR-II photothermal agent of IR-1061,producing SDLI with a tighter inner hole,smaller and uniform particle size and excellent stability due to multiple pulling ***,the intricate internal network structure prevents the hydrophobic IR-1061 from forming aggregates in the small cavity,and the photothermal conversion efficiency(PCE)can reach 48.9%.At the acidic tumor microenvironment of pH 6.5,the controlled release of LND can solve the problem of heat resistance of NIR-II mild PTT and significantly improve the therapeutic effect of NIR-II mild ***,SDLI also shows a reasonable tumor inhibition rate,so the synergistic strategy of inhibiting tumor energy metabolism and NIR-II mild PTT to magnify mitochondrial oxidative stress,continuous cell stress state-induced immunogenic cell death to promote the induction of tumor apoptosis is proposed to achieve more effective cancer treatment.

关键词： self-shrinkage dynamic supramolecular nanoparticles tumor energy metabolism NIR-II mild photothermal therapy mitochondrial oxidative stress

Highly efficient through-space charge transfer TADF molecule employed in TADF-and TADF-sensitized organic light-emitting diodes

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Science China Chemistry 2024年第4期67卷 1270-1276页

作者： Jiasen Zhang Deli Li Wei Li Yujie Wu Xilin Mu Chunyu Liu Kaibo Fang Ziyi Ge Zhejiang Provincial Engineering Research center of Energy Optoelectronic materials and devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Luminescent materials and devices and Institute of Polymer Optoelectronic materials and devices South China University of TechnologyGuangzhou 510640China

The inception and harnessing of excitons are paramount for the electroluminescence performance of organic light-emitting devices(OLEDs).Through-space charge transfer(TSCT)via intramolecular interaction has proved to be one of the most potent techniques employed to achieve 100% internal quantum ***,molecular strategies utilized to comprehensively enhance the electroluminescent performance of TSCT emitters regarding improving the photoluminescence quantum yield(PLQY)and elevating the light out-coupling efficiency remain *** surmount this challenge,we deliberately designed and synthesized a proof-of-concept TSCT emitter called CzO-TRZ by incorporating an extra carbazole donor into spiroheterocyclic *** introduction of rigid spiral fragments can immensely boost the horizontal orientation dipole ratio and establish an extra through-bond charge transfer(TBCT)radiative decay *** a result,a very high PLQY of 98.7%,fast kRISCof 2.2×10^(5)s^(-1)and high k_(r)^(s) of 2.2×10^(7)s^(-1),and an ultrahigh horizontal dipolar ratio of 90%were concurrently achieved for Cz O-TRZ blended ***,corresponding thermally activated delayed fluorescence(TADF)-and TADF-sensitized fluorescence(TSF)-OLEDs based on CzO-TRZ demonstrated external quantum efficiencies(EQEs)of 33.4% and 30.3%,respectively,highlighting its versatile applications as both an emitter and sensitized host.

关键词： organic electronics organic light-emitting diodes polycyclic aromatic hydrocarbons multiple-resonance

Optical grade (Gd_(0.95-x)Lu_(x)Eu_(0.05))_(3)Al_(5)O_(12) ceramics with near-zero optical loss: Effects of Lu^(3+) doping on structural feature, microstructure evolution, and far-red luminescence

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Journal of Advanced Ceramics 2024年第1期13卷 113-123页

作者： Zhigang Sun Ji-Guang Li Huiyu Qian Yoshio Sakka Tohru SSuzuki Bin Lu School of materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China Research center for Electronic and Optical materials National Institute for Materials ScienceIbaraki 305-0044Japan Key Laboratory of Photoelectric Detection materials and devices of Zhejiang Province Ningbo 315211China

A chemical co-precipitation strategy was employed to synthesize a series of(Gd_(0.95−x)Lu_(x)Eu_(0.05))_(3)Al_(5)O_(12)(x=0.1−0.95)powder phosphors,followed by vacuum sintering to achieve transparent garnet ceramic *** density functional theory indicated Lu_(3)Al_(5)O_(12) was formed in priority compared with Gd_(3)Al_(5)O_(12) during solid-phase *** high-temperature sintering,the Lu^(3+)substitution for Gd^(3+)suppressed point mass diffusion leading to a smaller grain *** in-line transmittances of bulk specimens with x=0.1,0.3,0.5,0.7,and 0.95 nm were~83.5%,80.1%,68.8%,73.7%,and 82.2%at 710 nm(Eu^(3+)emission center),respectively,among which the sample of x=0.1 exhibited the optical grade with near-zero optical loss in agreement with the defect-free single crystal(~100%of the theoretical transmittance).The resulting particle and ceramic materials both presented characteristic Eu^(3+)emission arising from 5D0→7FJ(J=1−4)transition,where the dominant far-red emission at~710 nm arising from ^(5)D_(0)→^(7)F_(4) transition overlapped with the absorption of phytochrome(PFR).The photoluminescence excitation and photoluminescence intensities of(Gd_(0.95−x)Lu_(x)Eu_(0.05))_(3)Al_(5)O_(12) powders and ceramics generally increased at a higher Gd^(3+)/Lu^(3+)***^(3+)dopants delayed the fluorescence lifetime while the bulk samples had shorter lifetime compared to the particle *** transparent(Gd_(0.85)Lu_(0.1)Eu_(0.05))3Al_(5)O_(12) ceramic phosphor exhibited good thermal stability with a high thermal quenching temperature above 533 *** designed ceramic phosphor-converted light-emitting diode had a saturation injection current of 435 mA and a current-dependent color rendering *** importantly,our report marked the developmental stage of transparent ceramic materials towards zero optical loss.

关键词： transparent ceramics garnet phosphors light-emitting diode(LED) optical properties Gibbs free energy

microenvironment responsive pod-structured astaxanthin nanocarrier for ameliorating inflammatory bowel disease

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Chinese Chemical Letters 2024年第7期35卷 360-366页

作者： Jingting Wang Yuanyuan Chen Linlin Han Shasha Xia Xingyao Zhang Peng Xue Yuejun Kang Jian Ming Zhigang Xu Key Laboratory of Luminescence analysis and Molecular Sensing Ministry of EducationSchool of Materials and Energy&Chongqing Engineering Research Center for Micro-Nano Biomedical Materials and DevicesSouthwest UniversityChongqing 400715China College of Food Science Southwest UniversityChongqing 400715China State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan UniversityChangsha 410082China

Anti-inflammatory drugs targeting inflammatory bowel disease(IBD)have attracted considerable attention but still face low therapeutic outcomes and frequent side ***(ATX),a natural ketone,possesses potent antioxidant and anti-inflammatory ***,it faces problems such as poor water solubility,photothermal instability,and low ***,we employed a supramolecular encapsulation strategy to create a nanoscale oral delivery system for ATX(referred to as FC-ATX NPs)by coupling fucoidan(FUC)with chitosan oligosaccharides(COS).The obtained FC-ATX NPs exhibited a particular“bean pod”structure with uniform size,good encapsulation efficiency,excellent physical and chemical stability,pH-triggered intestinal targeted slow-release properties,and potent antioxidant *** vitro cell culture experiments showed that FC-ATX NPs promoted cellular uptake and scavenged excessive intracellular reactive oxygen species(ROS).In mouse models of colitis,FC-ATX NPs enhanced the drug absorption of intestinal epithelial cells and effectively accumulated at the site of *** work provides an efficient approach to enhance the bioavailability of ATX and has excellent application potential as an oral targeted delivery system for colitis therapy.

关键词： Oral administration Astaxanthin Nanocarrier Anti-oxidant activity Colon targeting

Room-temperature ferroelectricity in van der Waals SnP_(2)S_(6)

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Frontiers of physics 2024年第4期19卷 113-123页

作者： Chaowei He Jiantian Zhang Li Gong Peng Yu State Key Laboratory of Optoelectronic materials and Technologies Guangzhou Key Laboratory of Flexible Electronic materials and Wearable devices Nanotechnology Research center School of Materials Science and EngineeringSun Yat-sen UniversityGuangzhou 510275China Instrumental analysis and Research center Sun Yat-sen UniversityGuangzhou 510275China

Two-dimensional(2D)ferroelectric materials,which possess electrically switchable spontaneous polarization and can be easily integrated with semiconductor technologies,is of utmost importance in the advancement of high-integration low-power *** the experimental discovery of certain 2D ferroelectric materials such as CuInP2S6 and In2Se3,achieving stable ferroelectricity at room temperature in these materials continues to present a significant ***,stable ferroelectric order at room temperature in the 2D limit is demonstrated in van der Waals SnP_(2)S_(6) atom layers,which can be fabricated via mechanical exfoliation of bulk SnP_(2)S_(6) *** polarization is observed in thin SnP_(2)S_(6) of~7 ***,a van der Waals ferroelectric field-effect transistor(Fe-FET)with ferroelectric SnP_(2)S_(6) as top-gate insulator and ptype WTe0.6Se1.4 as the channel was designed and fabricated successfully,which exhibits a clear clockwise hysteresis loop in transfer characteristics,demonstrating ferroelectric properties of SnP_(2)S_(6) atomic *** addition,a multilayer graphene/SnP_(2)S_(6)/multilayer graphene van der Waals vertical heterostructure phototransistor was also fabricated successfully,exhibiting improved optoelectronic performances with a responsivity(R)of 2.9 A/W and a detectivity(D)of 1.4×10^(12) *** results show that SnP_(2)S_(6) is a promising 2D ferroelectric material for ferroelectric-integrated low-power 2D devices.

关键词： two-dimensional ferroelectric materials ferroelectric fieldeffect transistors photodetectors

Theoretical insights into efficient oxygen evolution reaction using non-noble metal single-atom catalysts on W2CO2 MXene

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Rare Metals 2024年第10期43卷 5082-5094页

作者： Jing-Yu Zhou Zhi-Cheng Han Shu Zhao Tao Yang Da-Zhou Yan Hai-Jun Yu Institute of Advanced Battery materials and devices College of Materials Science and EngineeringBeijing University of Technology Key Laboratory of Advanced Functional materials Ministry of EducationBeijing University of Technology China ENFI Engineering Corporation national Engineering Research center of Silicon-Based materials Manufacturing Technology

The pursuit of highly active oxygen evolution reaction （OER） catalysts,especially those free of noble metals,is a focal point in fuel cell *** extensive density functional theory calculations,this study designed and evaluated the activity and stability of singleatom catalysts （SACs） composed of 3d,4d and 5d transition metals supported on tungsten-based MXene for OER *** highlighted the exceptional OER performance of Ni@W2CO2,Rh@W2CO2and Pt@W2CO2,displaying remarkably low overpotentials The catalytic activity of TM@W2CO2SACs exhibited a robust correlation with surface properties,particularly the d-band center index and surface work *** Ni@W2CO2,Rh@W2CO2and Pt@W2CO2emerged as promising candidates for OER and oxygen reduction reaction （ORR） bifunctional catalysis,while Pt@W2CO2and Rh@ W2CO2showed high potential for OER and hydrogen evolution reaction （HER） bifunctional catalysis The effectiveness of tungsten-based MXene as a substrate for non-noble-metal SACs marks a breakthrough in OER catalyst design,driving advancements towards sustainable energy solutions and addressing critical challenges in energy conversion and storage.

关键词： Density functional theory MXene Non-noble metal Oxygen evolution reaction Single-atom catalysts

Electroluminescence from pure resonant states in hBN-based vertical tunneling junctions

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Light(Science & Applications) 2024年第8期13卷 1557-1564页

作者： Magdalena Grzeszczyk Kristina Vaklinova Kenji Watanabe Takashi Taniguchi Konstantin SNovoselov Maciej Koperski Institute for Functional Intelligent materials National University of SingaporeSingapore 117544Singapore Research center for Functional materials National Institute for Materials ScienceTsukuba 305-0044Japan International center for materials Nanoarchitectonics National Institute for Materials ScienceTsukuba 305-0044Japan Department of materials Science and Engineering National University of SingaporeSingapore 117575Singapore

Defect centers in wide-band-gap crystals have garnered interest for their potential in applications among optoelectronic and sensor ***,defects embedded in highly insulating crystals,like diamond,silicon carbide,or aluminum oxide,have been notoriously difficult to excite electrically due to their large internal *** address this challenge,we realized a new paradigm of exciting defects in vertical tunneling junctions based on carbon centers in hexagonal boron nitride(hBN).The rational design of the devices via van der Waals technology enabled us to raise and control optical processes related to defect-to-band and intradefect *** fundamental understanding of the tunneling events was based on the transfer of the electronic wave function amplitude between resonant defect states in hBN to the metallic state in graphene,which leads to dramatic changes in the characteristics of electrons due to different band structures of constituent *** our devices,the decay of electrons via tunneling pathways competed with radiative recombination,resulting in an unprecedented degree of tuneability of carrier dynamics due to the significant sensitivity of the characteristic tunneling times on the thickness and structure of the *** enabled us to achieve a high-efficiency electrical excitation of intradefect transitions,exceeding by several orders of magnitude the efficiency of optical excitation in the sub-band-gap *** work represents a significant advancement towards a universal and scalable platform for electrically driven devices utilizing defect centers in wide-band-gap crystals with properties modulated via activation of different tunneling mechanisms at a level of device engineering.

关键词： carbide tunneling defect

Photostability of colloidal single photon emitter in near-infrared regime at room temperature

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Chinese Physics B 2024年第3期33卷 515-520页

作者：靳思玥许兴胜 Key Laboratory of Optoelectronic materials and devices Chinese Academy of SciencesBeijing 100083China center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Hefei national Laboratory Hefei 230088China

The photostability of a colloidal single photon emitter in near-infrared regime at room temperature is *** fluorescence lifetime,blinking phenomenon,and anti-bunching effect of a single CdTeSe/ZnS quantum dot with an emission wavelength of 800 nm at room temperature are *** second-order correlation function at zero delay time is much smaller than 0.1,which proves that the emission from single quantum dots at 800 nm is a highly pure single-photon *** effects of the irradiation duration on the fluorescence from single quantum dots are *** experimental results can be explained by a recombination model including a multi-nonradiative recombination center model and a multi-charged model.

关键词： colloidal quantum dots single photon source blinking