检索结果-南通市图书馆

A simple spectroscopic method for the quantification of gold nanoparticle number concentration in water and fetal bovine serum solutions

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2014年第16期59卷 1816-1821页

作者： Ruimin Wang Kuan Chen Guanglu Ge CAS Key Laboratory of Standardization and Measurement for Nanotechnology National Center for Nanoscience and Technology

In this work,we developed a facile and low-cost method with sufficient sensitivity for the quantitative determination of gold nanoparticles(GNPs)number concentration in water and fetal bovine serum *** Au(III)digested from GNPs was reduced to Au(I)presumably by the thiol group of 2-mercaptobenzimidazole,then the Au(I)–thiolate complex was formed,the concentration of which is determined by absorbance at 300 *** number concentration of GNPs can be converted using microscopic images and simple *** interference of serum can be avoided in this *** limit of detection(LOD)of GNPs was calculated as 2.1 910-12mol/L in water solution and 1.3 9 10-11mol/L in fetal bovine serum(FBS)*** method provides a simple and fast way to determine the concentration of GNPs,which can be in carried out in the routine laboratory practice.

关键词：金纳米粒子粒子数浓度胎牛血清水溶液谱方法定量化国民生产总值定量测定

Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

在线全文

学校读者我要写书评

暂无评论

Nano Research 2014年第1期7卷 1-62页

作者： Mark J. Armstrong Colm O'Dwyer William J. Macklin Justin. D. Holmes Materials Chemistry & Analysis group Department of Chemistry and the Tyndall National Institute University College Cork Cork Ireland Applied nanoscience group Department of Chemistry and the Tyndall National Institute University College Cork Cork Ireland Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) Trinity College Dublin Dublin 2 Ireland Nexeon Limited Abingdon Oxfordshire UK.

The performance of the lithium-ion cell is heavily dependent on the ability of the host electrodes to accommodate and release Li＋ ions from the local structure. While the choice of electrode materials may define parameters such as cell potential and capacity, the process of intercalation may be physically limited by the rate of solid-state Li＋ diffusion. Increased diffusion rates in lithium-ion electrodes may be achieved through a reduction in the diffusion path, accomplished by a scaling of the respective electrode dimensions. In addition, some electrodes may undergo large volume changes associated with charging and discharging, the strain of which, may be better accommodated through nanostructuring. Failure of the host to accommodate such volume changes may lead to pulverisation of the local structure and a rapid loss of capacity. In this review article, we seek to highlight a number of significant gains in the development of nanostructured lithium-ion battery architectures （both anode and cathode）, as drivers of potential next-generation electrochemical energy storage devices.

关键词： lithium ion batteries nanostructuring anodes cathodes

Ternary blend strategy in benzotriazole-based organic photovoltaics for indoor application

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Green Energy & Environment 2021年第6期6卷 920-928页

作者： Yinglong Bai Runnan Yu Yiming Bai Erjun Zhou Tasawar Hayat Ahmed Alsaedi Zhan'ao Tan State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing102206China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing100029China CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China NAAM Research group Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia

Organic photovoltaics(OPVs)suitable for application in indoor lighting environments can power a wide range of internet of things(Io T)related electronic *** ternary structure has huge advantages in improving the photovoltaic performance of OPVs,including broadening the light absorption,improving the charge transport,manipulating the energy loss(E_(loss))and so ***,we use wide-bandgap photo-active materials,including the benzotriazole-based polymer donor(J52-F),chlorinated polymer donor(PM7)and A_(2)-A_1-D-A_1-A_(2)-structured acceptor(BTA3),to construct ternary OPVs for indoor light *** from the introduction of PM7 as the third component in J52-F:BTA3-based blend,a gratifying PCE of 20.04%with a high V_(OC)of 1.00 V can be obtained under the test conditions with an illumination of 300 lx from an LED lighting source with a color temperature of 3000 *** excellent device performance is inseparable from the matched spectrum,enhanced light absorption and the reduced E_(loss),while the improved charge transport capability and suppression of carrier recombination also play an indelible *** work shows a potential material system to meet the requirement of devices applied under indoor ***,these findings demonstrate that designing multi-component OPVs is indeed a feasible way to further improve the performances of the photovoltaic energy conversion system for indoor applications.

关键词： Organic photovoltaics Indoor application Ternary blends Open-circuit voltage Charge generation

STING and TLR9 agonists synergistically enhance the immunogenicity of SARS-CoV-2 subunit vaccine

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第12期16卷 13322-13334页

作者： Yang Li Ziwei Chen Xinyi Lu Jiufeng Sun Mengyu Guo Huige Zhou Ru Bai Yuliang Zhao Chunying Chen Yaling Wang CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety and CAS Center for Excellence in nanoscience National Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China The GBA National Institute for Nanotechnology Innovation Guangzhou 510700China Guangdong Provincial Institute of Public Health Guangdong Provincial Center for Disease Control and PreventionGuangzhou 511430China Research Unit of nanoscience and Technology Chinese Academy of Medical SciencesBeijing 100049China

Vaccines that are reliable and efficacious are essential in the fight against the COVID-19 *** this study,we designed a dual-adjuvant system with two pathogen-associated molecular patterns(PAMPs),MnOx and *** system can improve the retention of antigens at the injection site,facilitate pro-inflammatory cytokines secretion,further recruit and activate dendritic cells(DCs).As a result,antigens can be delivered to lymph nodes specifically,and adaptive immunity was *** immunized group showed an enhanced and broadened humoral and cellular immune response in systemic immunity and lung protection when combined with a tandem repeat-linked dimeric antigen version of the SARS-CoV-2 receptor binding domain(RBDdimer).Remarkably,even with a significant reduction in antigen dosage(three times lower)and a decrease in injection frequencies,our nanovaccine was able to produce the highest neutralizing antibody titers against various *** titers were four-fold higher for the wild-type strain and two-fold higher for both the Beta and Omicron variants in comparison with those elicited by the Alum adjuvant *** conclusion,our dual-adjuvant formulation presents a promising protein subunit-based candidate vaccine against SARS-CoV-2.

关键词： dual-adjuvant system synergistic immune activation antigen dosage reducing variants neutralizing

Hydrogen bonding networks controllable by the substitution position of tetrathiafulvalene on the pyridine ring

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2019年第3期30卷 767-770页

作者： Jing Xu Yibao Li Lejia Wang Xiaoyang Zhu Xunwen Xiao Yanfang Geng Ke Deng Qingdao Zeng CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology (NCNST) Key Laboratory of Organo-pharmaceutical Chemistry InstitutionGannan Normal University College of Chemical Engineering Ningbo University of Technology

Tetrathiafulvalene(TTF), as a classical building unit, has attracted considerable attention, especially its functional derivatives. Hydrogen bonding(H-bonding) networks are a class of traditional and stable nanostructures, which play an important role in two-dimensional self-assembly and multi-component co-assembly. In this paper, we studied the regulation of H-bonding networks by functional groups in TTF derivatives. The results indicate that the position of pyridine on TTF not only affects their self-assembly structures in different solvents, but also controls the H-bonding networks through different mechanisms. Both para-TTF and meta-TTF molecules show different co-assembled structures with solvents depending on whether or not the presence of carboxylic acid group. On the pre-prepared H-bonding networks formed by famous 1,3,5-tris(10-carboxydecyloxy)-benzene(TCDB) molecule, both para-TTF and meta-TTF disturbed the original network structures with different degree of TCDB deformation. The formed new H-bonding networks with or without TTF derivatives participation are mainly attributed to the position of pyridine in TTF-based molecules. These results would be important for design of exceptional and functional nanostructures starting with the design of building block.

关键词： Tetrathiafulvalene Pyridine Solvent Network Self-assembly

Influence of functional groups on the self-assembly of liquid crystals

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2021年第3期32卷 1149-1152页

作者： Shanchao Tan Jiayu Tao Wendi Luo Hao Jiang Yuhong Liu Haijun Xu Qjngdao Zeng Hongyu Shi State Key Laboratory of Tribology Tsinghua UniversityBeijing 100084China CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology(NCNST)Beijing 100190China Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Chemical EngineeringNanjing Forestry UniversityNanjing 210037China Laboratory of Theoretical and Computational nanoscience CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China Center of Materials Science and Optoelectonics Engineering University of Chinese Academy of SciencesBeijing 100049China Sino-Danish Center for Education and Research University of Chinese Academy of SciencesBeijing 100190China

Functional groups in the molecule play an important role in the molecular o rganization *** reveal the influence of functional groups on the self-assembly at interface,herein,the self-assembly structures of three liquid crystal molecules,which only differ in the functional groups,are explicitly characterized by using scanning tunneling microscopy(STM).The high-resolution STM images demonstrate the difference between the supramolecular assembly structures of three liquid crystal molecules,which attribute to the hydrogen bonding interaction andπ-πstacking interaction between different functional *** density functional theory(DFT)results also confirm the influence of these functional groups on the *** effort on the self-assembly of liquid crystal molecules at interface could enhance the understanding of the supramolecular assembly mechanism and benefit the further application of liquid crystals.

关键词： Self-assembly Liquid crystal Functional group Hydrogen bond π-πStacking interaction

Advancing intestinal organoid technology to decipher nano-intestine interactions and treat intestinal disease

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第3期16卷 3976-3990页

作者： Lin Bao Xuejing Cui Ru Bai Chunying Chen CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety&CAS Center for Excellence in nanoscience National Center for Nanoscience and Technology of ChinaChinese Academy of SciencesBeijing 100190China The GBA National Institute for Nanotechnology Innovation Guangzhou 510700China University of Chinese Academy of Sciences Beijing 100049China

With research burgeoning in nanoscience and nanotechnology,there is an urgent need to develop new biological models that can simulate native structure,function,and genetic properties of tissues to evaluate the adverse or beneficial effects of nanomaterials on a *** the current biological models,three-dimensional(3D)organoids have developed as powerful tools in the study of nanomaterial-biology(nano-bio)interactions,since these models can overcome many of the limitations of cell and animal models.A deep understanding of organoid techniques will facilitate the development of more efficient nanomedicines and further the fields of tissue engineering and personalized ***,we summarize the recent progress in intestinal organoids culture systems with a focus on our understanding of the nature and influencing factors of intestinal organoid *** also discuss biomimetic extracellular matrices(ECMs)coupled with *** particular,we analyze the application prospects for intestinal organoids in investigating nano-intestine *** integrating nanotechnology and organoid technology,this recently developed model will fill the gaps left due to the deficiencies of traditional cell and animal models,thus accelerating both our understanding of intestine-related nanotoxicity and the development of nanomedicines.

关键词： intestinal organoid biomimetic extracellular matrices(ECMs) intestinal tissue engineering nano-intestine interaction

Kinetic adsorption of application of carbon nanotubes for Pb(Ⅱ) removal from aqueous solution

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2009年第4期21卷 539-544页

作者： Nassereldeen A Kabbashi Muataz A Atieh Abdullah Al-Mamun Mohamed E S Mirghami MD Z Alam Noorahayu Yahya Bio-Environmental Research Unit Department of Biotechnology Engineering International Islamic University MalaysiaJalan Gombak 50728 Malaysia nanoscience and Nanotechnology group Department of Biotechnology Engineering International Islamic University MalaysiaJalan Gombak 507283 Malaysia Department of Chemical Engineering King Fahd University for Petroleum and MineralSaudi Arabia

The capability of carbon nanotubes （CNTs） to adsorb lead （Pb） in aqueous solution was investigated. Batch mode adsorption experiment was conducted to determine the effects of pH, agitation speed, CNTs dosage and contact time. The removal of Pb（II） reached maximum value 85% or 83% at pH 5 or 40 mg/L of CNTs, respectively. Higher correlation coefficients from Langmuir isotherm model indicates the strong adsorptions of Pb（II） on the surface of CNTs （adsorption capacity Xm = 102.04 mg/g）. The results indicates that the highest percentage removal of Pb （96.03%） can be achieved at pH 5, 40 mg/L of CNTs, contact time 80 min, and agitation speed 50 r/min.

关键词： lead removal carbon nanotubes kinetic modeling adsorption

Wide Band Gap Non-Fullerene Small Molecular Acceptors Containing Spirobifluorene and Benzotriazole with Three Different End-Capped groups for P3HT-Based Organic Solar Cells

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2018年第5期36卷 392-398页

作者： Xiaoyu Wen Bo Xiao Ailing Tang Junyi Hu Chunhe Yang Erjun Zhou Department of Chemistry School of Science Beijing Jiaotong University Beijing 100044 China CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 China University of Chinese Academy of Sciences Beijing 200049 China

Spirofluorene （SF） and benzo[d][1,2,3]triazole （BTA） have been considered as promising building blocks to construct n-type photovoltaic materials. Herein, three new small molecule acceptors （SMAs） named BTA21, BTA23 and BTA27 with the structure of A2=A1-D-AI^A2 have been designed, in which SF and BTA were used as a central unit of D and bridged acceptor unit of A1, respectively. In addition, 3-ethylrhodanine, 2-（3-ethyl-4-oxothiazolidin-2-ylidene）malononitrile and malononitrile were chosen as terminal acceptor units to modulate the properties of the final SMAs. Three SMAs show wide optical band gaps （Eg） of 2.19, 2.15 and 2.22 eV, respectively, with gradually down-shift of the lowest unoccupied molecular orbital {LUMO） levels in the order of BTAZl, BTA23 and BTA27 depending on the electron-withdrawing capability of terminal acceptor units. BTA21 shows great advantages with respect to donor poly（3-hexylthiophene）（P3HT） over BTA23 and BTA27, such as well energy-level matching, complementary absorption and proper morpholgy, Concequently, P3HT：BTA21 shows the best power conversion efficiency （PCE） value of 3.28% with an open-circuit voltage （Voc） of 1.02 V, a short-circuit current （Jsc） of 5.45 ***-2 and a fill factor （FF） of 0.59. These results indicate that the terminal acceptor group end-capped in SMAs plays a significant role in controlling their optical, electronic, and photovoltaic properties.

关键词： benzotriazole organic photovoltaic P3HT small molecular acceptor wide band gap