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nano Research 2017年第3期10卷 776-784页

作者： Jichuan Qiu Kun Zhao Linlin Li Xin Yu Weibo Guo Shu Wang Xiaodi Zhang Caofeng Pan Zhong Lin Wang Hong Liu Beijing Institute of nanoenergy and nanosystems Chinese Academy of Sciences National center for nanoscience and Technology (NCNST) Beijing 100083 China bio-micro-nano functional materials center State Key Laboratory of Crystal Materials Shandong University 3inan 250100 China

nanomaterials show promising opportunities to address clinical problems （such as insufficient capture of circulating tumor cells; CTCs） via the high surface area-to-volume ratio and high affinity for biological cells. However, how to apply these nanomaterials as a nano-bio interface in a microfluidic device for efficient CTC capture with high specificity remains a challenge. In the present work, we first found that a titanium dioxide （TiO2） nanorod array that can be conveniently prepared on multiple kinds of substrates has high affinity for tumor cells. Then, the TiO2 nanorod array was vertically grown on the surface of a microchannel with hexagonally patterned Si micropillars via a hydrothermal reaction, forming a new kind of a micro-nano 3D hierarchically structured microfluidic device. The vertically grown TiO2 nanorod array was used as a sensitive nano-bio interface of this 3D hierarchically structured microfluidic device, which showed high efficiency of CTC capture （76.7% ± 7.1%） in an artificial whole-blood sample.

关键词： TiO2 nanorod array circulating tumor cell microfluidic device nano-bio interface 3D hierarchical structure

Influence of operational parameters on the photocatalytic performance of DE-NOx process Via MIL-101(Fe)

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Progress in Natural Science:materials International 2018年第6期28卷 689-695页

作者： Hoang Phuc Nguyen Tae Ho Kim Soo Wohn Lee Research center for Eco Multi-functional nano materials Sun Moon University Department of Environmental & bio-Chemical Engineering Sun Moon University

Metal organic framework(MOF)has been paid great attention as a potential candidate for various applications in the field of energy and environment,particularly in air *** various MOFs,MIL-101(Fe) represents an interesting material possessing many advantages,including the ease of fabrication,high porosity,high specific surface area with open metal sites,making it a promising material in the field of harmful gas *** these advantages,MIL-101(Fe) was synthesized by facile microwave-solvothermal method and applied as a photocatalyst for the degradation of *** de-NOxefficiency of the synthesized powder was evaluated with respect to various operating parameters including substrates,sample doses,light spectrum and light intensity,initial NO concentration,and relative *** results have shown that the efficiency of NOxphotocatalytic degradation reaches to 77%under solar irradiation via 0.1 g of MIL-101(Fe) with optimum condition of reaction,(alumina substrate,350 ppb of initial NO concentration,40–50%of relative humidity).Then this work provides the optimum condition for the efficient photocatalytic degradation of NOx.

关键词： Metal-organic framework MIL-101 Gaseous pollutant NOx emission Photocatalyst

Effects of Particle Sizes on the Electromagnetic Property of Flaky FeSi Composites

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Acta Metallurgica Sinica(English Letters) 2013年第4期26卷 366-372页

作者： Yonggang XU Liming YUAN Jun CAI Jianlu LV Deyuan ZHANG bionic and micro/nano/bio Manufacturing Technology Research center School of Mechanical Engineering and AutomationBeihang University

Flaky FeSi absorbents with different size ranges were fabricated by sintering after mechanical milling process. X-ray diffraction （XRD） was used to analyze the particle crystal grain structure. The complex permittivity and permeability of FeSi/paraffin composites were measured in frequency of 2-12 GHz using a vector network analyzer, and the DC electric conductivity was measured by the standard four-point contact method, then microwave reflection loss （RL） and shielding effectiveness （SE） were calculated. It was obtained that c^-Fe appeared in the super-lattice diffraction peaks in XRD pattern. As the particles size decreased, the permittivity decreased due to the inferior microwave electrical conductivity and dielectric loss tangent, while the permeability increased due to the decrease of diameter-thickness ratio, which could be demonstrated in the comparison between the experiment and calculation results. When thickness is 1 mm, the composites with the smallest FeSi particles addition had a better absorbing property for the better impedance matching characteristic, and the minimum RL was -7.9 dB at 4.6 GHz. While the composites with larger FeSi particles addition had an excellent shielding property due to the higher permittivity, the SE value ranged from 15 dB to 30 dB at the frequency band.

关键词： FeSi alloy Absorbing property Shielding property Mechanical milling

Magnetization of microorganism cells by thermal decomposition method

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Science China(Technological Sciences) 2011年第5期54卷 1275-1280页

作者： ZHANG DeYuan ZHANG WenQiang CAI Jun bionic and micro/nano/bio Manufacturing Technology Research center Beihang University Beijing 100191 China

The bio-limited forming technology, a new technology organically integrating microbiology, manufacturing science and materials science, is used in the manufacturing of magnetic or conductive microstructures of different standard shapes. This paper explores the feasibility of magnetizing microorganism with thermal decomposition method. The principle of thermal decomposition of iron pentacarbonyl has been adopted to investigate the cells of Spirulina (a type of nature micro-helical microorganism) coated with pure iron. Further analysis have been conducted on the observations results of hollow micro-helical magnetic particles form, components and the phase structure obtained by using various tools including optical microscopy, scanning electron microscopy (SEM), energy dispersive X-ray detector (EDX), transmission electron microscopy (TEM), and X-ray diffraction analysis (XRD). Results showed that Spirulina cells could be coated with iron particles after the completion of thermal decomposition process, with well-kept shape of natural helixes and consistent components of different sampling points on the surface layer and thickness of layer. After the heat treatment at 700°C, the type of the surface iron layer formed was α-Fe. The paper also investigates the kinetics of the cell magnetization technology by thermal decomposition.

关键词： bio-manufacturing bio-limited forming hollow micro-helical magnetic particles Fe(CO)5 thermal decomposition

Effects of Multi-walled Carbon nanotubes on the Electromagnetic Absorbing Characteristics of Composites Filled with Carbonyl Iron Particles

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Journal of materials Science & Technology 2012年第1期28卷 34-40页

作者： Yonggang Xu Deyuan Zhang Jun Cai Liming Yuan Wenqiang Zhang bionic and micro/nano/bio Manufacturing Technology Research center School of Mechanical Engineering and AutomationBeihang UniversityBeijing 100191China

The electromagnetic （EM） wave absorbing property of silicone rubber filled with carbonyl iron particles （CIPs） and multi-walled carbon nanotubes （MWCNTs） was examined. Absorbents including MWCNTs and spherical/ flaky CIPs were added to silicone rubber using a two-roll mixer. The complex permittivity and complex permeability were measured over the frequency range of 1-18 GHz. The two EM parameters were verified and the uniform dispersion of MWCNTs and ClPs was confirmed by comparing the measured reflection loss （RL） with the calculated one. As the MWCNT weight percent increased, the RL of the spherical CIPs/silicone rubber composites changed insignificantly. It was attributed to the random distribution of spherical ClPs and less content of MWCNTs. On the contrary, for composites filled with flaky ClPs the absorption bandwidth increased at thickness 0.5 mm （RL value lower than -5 dB in 8-18 GHz） and the absorption ratio increased at lower frequency （minimum -35 dB at 3.5 GHz）. This effect was attributed to the oriented distribution of flaky CIPs caused by interactions between the two absorbents. Therefore, mixing MWCNTs and flaky CIPs could achieve wider-band and higher-absorption ratio absorbing materials.

关键词： Absorbing materials Carbon nanotubes Carbonyl iron particles Composites Reflection loss

microwave Absorption and Shielding Property of Composites with FeSiAl and Carbonous materials as Filler

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Journal of materials Science & Technology 2012年第10期28卷 913-919页

作者： Wenqiang Zhang Yonggang Xu Liming Yuan Jun Cai Deyuan Zhang bionic and micro/nano/bio Manufacturing Technology Research center School of Mechanical Engineering and Au-tomationBeihang UniversityBeijing 100191~China

Silicone rubber composites filled with FeSiAI alloys and multi-walled carbon nanotubes （MWCNT）/graphite have been prepared for the first time by a coating process. The complex permittivity and permeability of the composites were measured with a vector network analyzer in a 1-4 GHz frequency range, and the DC electric conductivity was measured by a standard four-point contact method. These parameters were then used to calculate the reflection loss （RL） and shielding effectiveness （SE） of the composites. The results showed that the added MWCNT increased the permittivity and permeability of composites in the L-band, while the added graphite increased only the permittivity. The variation lies in the interactions between two carbonous absorbents. Addition of 1 wt% MWCNT enhanced the RL in the L-band （minimum -5.7 dB at 1 ram, -7.3 dB at 1.5 ram）, while the addition of graphite did not. Addition of MWCNT as well as graphite reinforced the shielding property of the composites （maximum SE 13.3 dB at 1 ram, 18.3 dB at 1.5 ram） owing to the increase of conductivity. The addition of these carbonous materials could hold the promise of enforcing the absorption and shielding property of the absorbers.

关键词： Absorbing materials Electromagnetic Reflection loss Shielding effectiveness

Zwitterionic-phosphonate block polymer as anti-fouling coating for biomedical metals

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Rare Metals 2022年第2期41卷 700-712页

作者： Ya-Hui Gu Hong-Wei Liu Xiao-Han Dong Zhuang-Zhuang Ma You-Xin Li Li Li Dong-Lin Gan Ping-Sheng Liu Jian Shen Jiangsu Key Laboratory of bio-functional materials Jiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023China Jiangsu Engineering Research center of Interfacial Chemistry Nanjing UniversityNanjing 210093China

Antifouling ability and blood compatibility are critically important in the development of medical metallic implants for clinical ***,we report the zwitterionic-phosphonate block polymer as a new type of high-efficiency antifouling coating for metallic *** block polymers(pSBMA-b-pDEMMP)with different segment lengths(nSBMA:nDEMMP=10:25,40:25,100:25,75:5,75:40,75:100)were prepared and anchored on titanium alloy(TC4)substrates.1H nuclear magnetic resonance(NMR)results clearly showed the precise preparation of the block *** analysis and water contact angle measurement indicated the successful construction of the block polymer on TC4 *** relationship between the antifouling performance of the polymer coating and the length of pDEMMP and pSBMA segments in the block polymer was *** showed that the polymer containing the pSBMA segment above 40 repeat units could significantly inhibit protein adsorption,platelet adhesion,bacterial adhesion and cell adhesion,while the pDEMMP segment above 5 repeat units is able to generate stable zwitterionic polymer coating on TC4 *** ease of production and high-efficiency antifouling modification strategy elucidated here may find broad application for biomedical implants and devices in clinical applications.

关键词： Zwitterionic Phosphonate Anti-fouling coating biomedical metals

microstructure investigation and multicolor upconversion in Yb3+/Ln3+(Ln=Er/Tm/Ho) ions doped α-Sialon

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Progress in Natural Science:materials International 2019年第5期29卷 549-555页

作者： Sang Hoon Jeong Yuwaraj K.Kshetri Seung Ho Kim Sung Hun Cho Soo W.Lee Department of Environment and bio-Chemical Engineering Sun Moon University Research center for Eco Multi-functional nano materials Sun Moon University The Institute of Scientific and Industrial Research (ISIR) Osaka University

Yb3+/Ln3+(Ln=Er/Tm/Ho)-α-sialon ceramics were fabricated by hot press sintering *** microstructure and luminescent properties were studied by XRD,EDS,HRTEM and photoluminescence *** results showed that the sintered ceramics consisted ofα-Sialon with a trace amount ofβ-Sialon *** frequency upconversion and downconversion properties of Yb3+/Ln3+(Ln=Er/Tm/Ho)-α-Sialon ceramics were investigated under 980 nm low-power *** different concentrations of Yb3+/Ln3+(Ln=Er/Tm/Ho)produced multicolor emissions characteristics of each Ln3+ion as a result of the energy transfer from Yb3+to Er3+,Tm3+and Ho3+*** EDS spectra measurements and mappings showed that the Ln3+ions were well incorporated in theα-Sialon *** evolution of the emission decay behavior has been investigated to understand the energy transfer mechanism.

关键词： α-Sialon Hot press sintering Upconversion Energy transfer

Rational design of phosphonate/quaternary amine block polymer as an high-efficiency antibacterial coating for metallic substrates

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Journal of materials Science & Technology 2021年第3期62卷 96-106页

作者： Li Liu Wan Peng Xiao Zhang Jiangmei Peng Pingsheng Liu Jian Shen Jiangsu Collaborative Innovation center of biomedical functional materials Jiangsu Key Laboratory of Bio-functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing210023PR China Jiangsu Engineering Research center of Interfacial Chemistry Nanjing UniversityNanjing210093PR China

Developing advanced technologies to address the bacterial associated infections is an urgent requirement for metallic implants and ***,we report a novel phosphonate/quaternary amine block polymer as the high-efficiency antibacterial coating for metallic *** pDEMMP-b-pTMAEMA block polymers that bearing identical phosphonate segments(repeat units of 15)but varied cationic segments(repeat units of 8,45,and 70)were precisely *** cationic polymer coatings were constructed on TC4 substrates based on the strong covalent binding between phosphonate group and metallic *** relationship between the segment chain length of the polymer coating and the antibacterial property endowed to the substrates have been established based on quantitative and qualitative *** showed that the antibacterial rate of the modified TC4 surface were 95.8%of *** and 92.9%of *** cells ***,unlike the cationic free polymer or cationic hydrogels,the surface anchored cationic polymers do compromise the viability of the attached C2C12 cells but without significant *** addition,the phosphonate/quate rnary amine block polymers can be easily constructed on titanium,stainless steel,and Ni/Cr alloy with significantly improved antibacterial property,indicating the generality of the block polymer for surface antibacterial modification of bio-metals.

关键词： Block polymers Polymeric coating Metallic substrates Polycations Antibacterial property

Ultra-small MoS2 nanodots with rapid body clearance for photothermal cancer therapy

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nano Research 2016年第10期9卷 3003-3017页

作者： Teng Liu Yu Chao Min Gao Chao Liang Qian Chen Guosheng Song Liang Cheng Zhuang Liu Institute of functional nano & Soft materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & DevicesSoochow University 199 Ren'ai Road Suzhou 215123 China

The clinical translation of many inorganic nanomaterials is severely hampered by toxicity issues because of the long-term retention of these nanomaterials in the body. In this study, we developed a bio-clearable theranostic agent based on ultra-small MoS2 nanodots, which were synthesized by a facile bottom-up approach through one-step solvothermal decomposition of ammonium tetrathiomolybdate. After modification by glutathione （GSH）, the obtained MoS2-GSH nanodots exhibited sub-10-nm hydrodynamic diameters without aggregation in various physiological buffers. Without showing appreciable in vitro toxicity, such MoS2-GSH nanodots with strong near-infrared （NIR） absorbance could induce remarkable photothermal ablation of cancer cells. Upon intravenous （i.v.） injection, efficient tumor accumulation of MoS2-GSH nanodots was observed by photoacoustic imaging, and further confirmed by analysis of the biodistribution of Mo. Notabl）4 the MoS2-GSH nanodots, in contrast to conventional MoS2 nanoflakes with larger sizes, showed rather efficient body clearance via urine, where the majority of the injected dose was cleared within just seven days. Photothermal ablation of tumors on mice was then realized with the MoS2-GSH nanodots, achieving excellent therapeutic efficacy. This study presents a new type of ultra-small nanoparticle with efficient tumor homing/treatment abilities, as well as rapid body clearance behavior, making it promising for cancer theranostics without long-term toxiciW concerns.

关键词： ultra-small MoS2 nanodots photoacoustic imaging rapid body clearance photothermal therapy