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Journal of Energy Chemistry 2020年第9期29卷 160-168,I0005页

作者： Wen-Feng Ren Jun-Tao Li Shao-Jian Zhang Ai-Ling Lin You-Hu Chen Zhen-Guang Gao Yao Zhou Li Deng Ling Huang Shi-Gang Sun State Key Laboratory of Physical Chemistry of Solid Surfaces iChEM(Collaborative Innovation Center of Chemistry for Energy Materials)College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina College of Energy Xiamen UniversityXiamen 361005FujianChina

Si-based materials have been extensively studied because of their high theoretical capacity,low working potential,and abundant reserves,but serious initial irreversible capacity loss and poor cyclic performance resulting from large volume change of Si during lithiation and delithiation processes restrict their widespread ***,we report the preparation of multi-shell coated Si(DS-Si)nanocomposites by in-situ electroless deposition method using Si granules as the active materials and copper sulfate as Cu *** ratio of Si and Cu was readily tuned by varying the concentration of copper *** multi-shell(Cu@CuxSi/SiO2)coating on Si surface promotes the formation of robust and dense SEI films and the transportation of ***,the obtained DS-Si composites exhibit an initial coulombic efficiency of 86.2%,a capacity of 1636 mAh g^-1 after 100 discharge-charge cycles at 840 mA g^-1,and an average charge capacity of 1493 mAh g^-1 at 4200 mA g^-*** study provides a low-cost and large-scale approach to the preparation of nanostructured Si-metal composites anodes with good electrochemical performance for lithium ion batteries.

关键词： silicon nanoparticles Multi-shell coating Electroless deposition Anode materials Lithium ion batteries

Fluorescent silicon nanoparticles-based nanotheranostic agents for rapid diagnosis and treatment of bacteria-induced keratitis

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Nano Research 2021年第1期14卷 52-58页

作者： Lu Zhang Xiaoyuan Ji Yuanyuan Su Xia Zhai Hua Xu Bin Song Airui Jiang Daoxia Guo Yao He Laboratory of Nanoscale Biochemical Analysis Institute of Functional Nano and Soft Materials(FUNSOM)and Collaborative Innovation Center of Suzhou Nano Science and TechnologySoochow UniversitySuzhou 215123China Department of Ophthalmology Childrens Hospital ofSoochow UniversitySoochow UniversitySuzhou 215123China

Recommended as a medical emergency,infectious keratitis with an acute and rapid disease progression can lead to serious damage of vision and even ***,we present a kind of theranostic agents,which are made of vancomycin(Van)-modified fluorescent silicon nanoparticles(SiNPs-Van),enabling rapid and non-invasive diagnosis and treatment of Gram-positive bacteria-induced keratitis in a simultaneous ***,the resultant SiNPs-Van nanoagents have an ability of imaging bacteria in a short time both in vitro(5 min)and in vivo(10 min),making them an efficacious diagnostic agent for the detection of bacterial *** addition,the SiNPs-Van feature distinct antimicrobial activity,with superior activity of 92.5%at a concentration of 0.5 ng/mL against Staphylococcus aureus(***);comparatively,the antimicrobial rate of free vancomycin is 23.3%at the same *** further explore the SiNPs-Van agents as eye drops for therapy of ***-induced bacterial keratitis on rat *** by slit-lamp scores,the keratitis severity of SiNPs-Van-treated corneas is 3.4,which is 59.6%and 77.3%slighter than vancomycin-(8.2 score)and PBS-treated corneas(15.0 score),*** infected corneas recover to normal(1 score)after 7-d of SiNPs-Van *** results suggest that the SiNPs-Van could serve as a new kind of high-quality nanotheranostic agents,especially suitable for simultaneous diagnosis and therapy of Gram-positive bacteria keratitis.

关键词： bacterial keratitis bio-imaging theranostic probe silicon nanoparticles

Dependence of Optical Absorption in silicon Nanostructures on Size of silicon nanoparticles

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Communications in Theoretical Physics 2011年第4期55卷 688-692页

作者：丁文革苑静孟令海武树杰于威傅广生 College of Physics Science and Technology Hebei University

The amorphous silicon nanoparticles （Si NPs） embedded in silicon nitride （SiNx） films prepared by helicon wave plasma-enhanced chemical vapor deposition （HWP-CVD） technique are studied. From Raman scattering investigation, we determine that the deposited film has the structure of silicon nanocrystals embedded in silicon nitride （nc-Si/SiNx） thin film at a certain hydrogen dilution amount. The analysis of optical absorption spectra implies that the Si NPs is affected by quantum size effects and has the nature of an indirect-band-gap semiconductor. Further, considering the effects of the mean Si NP size and their dispersion on oscillator strength, and quantum-confinement, we obtain an analytical expression for the spectral absorbance of ensemble samples. Gaussian as well as lognormal size-distributions of the Si NPs are considered for optical absorption coefficient calculations. The influence of the particle size-distribution on the optical absorption spectra was systematically studied. We present the fitting of the optical absorption experimental data with our model and discuss the results.

关键词： optical absorption silicon nanoparticles quantum size effects oscillator strength silicon nitride film

Anomalous pressure-dependence in surface-modified silicon-derived nanoparticles

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Nano Research 2021年第12期14卷 4748-4753页

作者： Qi Li Abhinav Parakh Rongchao Jin X.Wendy Gu Department of Mechanical Engineering Stanford UniversityStanfordCA94305USA Department of Materials Science and Engineering Stanford UniversityStanfordCA94305USA Department of Chemistry Carnegie Mellon UniversityPittsburghPA15213USA

Surfaces can significantly alter the optical properties of nanomaterials,but they are difficult to control and their roles are hard to understand in highly reactive materials such as silicon *** this work,we investigate the role of the surface in controlling the optical transitions in highly luminescent silicon-derived *** combining high-pressure and low-temperature experiments,we experimentally correlate the anomalously intense and narrow transitions in the UV range with the surface oxides,while the visible transition and the photoluminescence(PL)are verified to originate from the Si-ligand charge transfer *** find that the high-pressure absorption and PL depends on the rigidity of the surface *** indicates that the surface plays a dominant role on the optical properties of these silicon-derived nanoparticles,and is different than other semiconductor nanomaterials,in which pressure-dependent optical transitions depend on lattice strain or phase *** work presents a comprehensive understanding of the optical transitions and the effect of surface ligands and surface oxidation in these highly luminescent Si-derived *** new insight into the oxidation-activated and ligand-mediated transitions,and the pressure-dependent PL may help with engineering the band structure of other highly-reactive optical nanomaterials.

关键词： silicon nanoparticles high pressure surface ligands surface oxidation diamond anvil cells

Photoluminescence properties and nitridation of silicon nanoparticles embedded in SiNx films annealed at high temperatures

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Photoluminescence properties and nitridation of silicon nano...

Fluorescent silicon nanoparticles for sensing Hg2+ and Ag+ as well visualization of latent fingerprints

2014中国功能材料科技与产业高层论坛

作者： Lihua Jiang Xiangbin Zeng Xiao Zhang Department of Electronic Science and Technology Huazhong University of Science and Technology

Nonstoichiometric silicon nitride(SiN)thin films were deposited on p-type monocrystalline silicon wafers and quartz substrates with a gas mixture of SiH and NH by plasma enhanced chemical vapor deposition(PECVD)method at *** temperature photoluminescence(PL)measurements were performed to study the luminescence properties of SiN films annealed at temperatures of *** scattering measurements were employed to characterize the microstructures of the films and the results im-plied the formation of amorphous silicon *** Fourier transform infrared(FTIR)spectra were used to investigate the changes of chemical bonds in the SiN *** PL from defect-related states and silicon nanoparticles were observedsimultaneously in the SiN *** conjunction with the Raman and the FTIR analyses,the PL results alsodemonstrated the nitridation of silicon nanoparticles(took place)during the thermal annealing at 1100℃in the N ambient.

关键词： silicon nanoparticles silicon nitride matrix Photoluminescence Nitridation

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Fluorescent silicon nanoparticles for sensing Hg2+ and Ag+ a...

silicon-based nanoprobes cross the blood–brain barrier for photothermal therapy of glioblastoma

中国化学会第十三届全国分析化学年会

作者： Baoya Zhu Guojuan Ren Mingyu Tang Fang Chai Fengyu Qu Chungang Wang Zhongmin Su Key Laboratory of Photochemical Biomaterials and Energy Storage Materials Colleges of Heilongjiang Province College of Chemistry and Chemical Engineering Harbin Normal University Faculty of Chemistry Northeast Normal University

We herein used a low cost and facile one-step method for synthesizing fluorescent carbon-doped silicon nanoparticles (Si NPs) under mild reaction *** fluorescence spectra of Si NPs showed maximum excitation and emission wavelengths at 370 nm and 450 nm,*** fluorescence of the obtained Si NPs can be selectively and efficiently quenched by the Hgand *** sensing ability of Si NPs for Hgand Agwere successfully carried out in real water *** NPs were also successfully employed as a promising fluorescent label for the visualization of latent *** far as we know,this is first time that silicon nanoparticles are used to visualize latent *** addition,Si NPs showed highly non-toxic for cellular media,the efficient bioimaging of cellular imaging was enabled after incubation of HepG2 cells in the presence of Si NPs.

关键词： silicon nanoparticles fluorescence probe Hg2+ Ag+ latent fingerprints

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Nano Research 2022年第8期15卷 7392-7401页

作者： Rong Sun Mingzhu Liu Zhaojian Xu Bin Song Yao He Houyu Wang Suzhou Key Laboratory of Nanotechnology and Biomedicine Institute of Functional Nano and Soft Materials(FUNSOM)and Collaborative Innovation Center of Suzhou Nano Science and TechnologySoochow UniversitySuzhou 215123China

Traditional photothermal agents of indocyanine green(ICG)have poor stability,short circulation time,and poor brain permeability due to the blood–brain barrier(BBB),greatly impairing their therapeutic efficacy in glioblastoma(GBM).Herein,we develop a novel kind of SiNPs-based nanoprobes to bypass the BBB for photothermal therapy of ***,the SiNPs-based nanoprobes are composed of the particle itself,the BBB-targeting ligand of glucosamine(G),and the therapeutic agent of *** demonstrate that the as-synthesized nanoprobes could cross the BBB through glucose transporter-1(GLUT1)-mediated transcytosis,followed by accumulation at GBM tissues in *** with free ICG,G-ICG-SiNPs show stronger stability(for example,the fluorescence intensity of G-ICG-SiNPs loaded with the same dose of ICG decays by 34.6%after 25 days of storage,while the fluorescence intensity of ICG decays by 99.5%under the same conditions).Furthermore,the blood circulation time of G-ICG-SiNPs increases by about 17.3-fold compared with their ICG *** injection of the therapeutic agents into the GBM-bearing mice,GBM-surface temperature rises to 45.3℃in G-ICG-SiNPs group after 5-min 808 nm irradiation but climbs only to 36.1℃in equivalent ICG group under the identical conditions,indicating the superior photothermal effects of GICG-SiNPs in vivo.

关键词： glioblastoma blood-brain barrier silicon nanoparticles indocyanine green photothermal therapy

Doping silicon Wafers with Boron by Use of silicon Paste

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Journal of Materials Science & Technology 2013年第7期29卷 652-654页

作者： Yu Gao Shu Zhou Yunfan Zhang Chen Dong Xiaodong Pi Deren Yang State Key Laboratory of silicon Materials Department of Materials Science and EngineeringZhejiang University

In this work we introduce recently developed silicon-paste-enabled p-type doping for silicon. Boron-doped silicon nanoparticles are synthesized by a plasma approach. They are then dispersed in solvents to form silicon paste. silicon paste is screen-printed at the surface of silicon wafers. By annealing, boron atoms in silicon paste diffuse into silicon wafers. Chemical analysis is employed to obtain the concentrations of boron in silicon nanoparticles. The successful doping of silicon wafers with boron is evidenced by secondary ion mass spectroscopy （SIMS） and sheet resistance measurements.

关键词： silicon nanoparticles silicon paste Doping Boron

Composites of graphene and encapsulated silicon for practically viable high-performance lithium-ion batteries

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Nano Research 2014年第10期7卷 1429-1438页

作者： Xin Zhao Minjie Li Kuo-Hsin Chang Yu-Ming Lin Bluestone Global Tech 169 Myers Corners Road Wappingers Falls NY 12590 USA

A facile and scalable approach to synthesize silicon composite anodes has been developed by encapsulating Si particles via in situ polymerization and carbonization of phloroglucinol-formaldehyde gel, followed by incorporation of graphene nanoplatelets. As a result of its structural integrity, high packing density and an intimate electrical contact consolidated by the conductive networks, the composite anode yielded excellent electrochemical performance in terms of charge storage capability, cycling life and coulombic efficiency. A half cell achieved reversible capacities of 1,600 mAh·g-1 and 1,000 mAh·g-1 at 0.5 A·g-1 and 2.1 A·g-1, respectively, while retaining more than 70% of the initial capacities over 1,000 cycles. Complete lithium-ion pouch cells coupling the anode with a lithium metal oxide cathode demonstrated excellent cycling performance and energy output, representing significant advance in developing Si-based electrode for practical application in high-performance lithium-ion batteries.

关键词： silicon nanoparticles graphene nanoplatelets phloroglucinol-formaldehyde gel lithium-ion batteries

Fluorescent quantum dots for microbial imaging

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Chinese Chemical Letters 2018年第10期29卷 1475-1485页

作者： Ge Gao Yao-Wen Jiang Wei Sun Fu-Gen Wu State Key Laboratory of Bioelectronics School of Biological Science and Medical EngineeringSoutheast University

Quantum dots（QDs）, with several unique optical and chemical features, are becoming desirable fluorescent tags for the biological applications that require long-term and highly sensitive ***, the conjugation of various functional biomolecules to QDs has enabled wide applications of QDs in biological imaging. This review focuses on the following four types of QDs： semiconductor quantum dots（semiconductor QDs）, carbon nanodots（CDs）, silicon quantum dots（SiQDs）, and polymer dots（Pdots）, and summarizes the recent advancements of using these QDs in imaging microorganisms including viruses, bacteria, and fungi. We hope that this review will promote the development of new fluorescent QDs for microbial imaging and extend the applications of QD-based imaging techniques in cell biology and beyond.

关键词： Quantum dots Single-virus tracking Bacterial labeling Fungal imaging silicon nanoparticles