检索结果-南通市图书馆

Synthesis and aggregation properties of amphiphilic mono and bisadducts of fullerene in aqueous solution

维普期刊数据库评论

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 2008年第9期19卷 1039-1042页

作者： Pu Zhanga zhi xin guo Shuang Lv Department of Chemistry Renmin University of China Beijing 100872 China Department of Chemistry Beijing Institute of Technology Beijing 100081 China

New amphiphilic[60]fullerene monoadduct TPF and bisadducts BTPF were synthesized and well-characterized. Their aggregation properties in aqueous solution was investigated by UV-vis and TEM methods. In aqueous solution, monoadduct TPF forms irregularly shaped and some rod-like aggregates, whereas bisadducts BTPF gives sphadcal aggregates with diameters of 50-150 rim. It indicated that the aggregation properties of amphiphilic fullerene derivatives depend on the number of hydrophilic

关键词： Fullerene Aggregation Amphiphilic

The electrochemical behavior of N-n-undecy1-N＇-（sodium-p- amino-benzenesulfonate） thiourea and its interaction with bovine serum albumin

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2008年第5期19卷 581-584页

作者： Hong Xia Luo Yang Du zhi xin guo Department of Chemistry Renmin University of China Beijing 100872 China

In pH 5.5 phosphate buffer solution, N-n-undecyl-N＇-（sodium-p-amino-benzenesulfonate） thiourea （UPT） produced a pair of redox peaks on the bare glassy carbon electrode. At the multi-walled carbon nanotube （MWNT） modified electrode, the electrochemical behavior of UPT enhanced greatly. In the presence of bovine serum albumin （BSA）, the peak currents of UPT decreased linearly due to the formation of a super-molecular complex. This method was successfully applied to the determination of BSA in a bovine serum sample.

关键词： N-n-Undecyl-N'-(sodium-p-amino-benzenesulfonate) thiourea Carbon nanotube Electrocatalysis Bovine serum albumin

Reversible electrochemistry of DNA on multi-walled carbon nanotube modified electrode

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2007年第7期18卷 861-864页

作者： Hong Xia Luo zhi xin guo Nan He Department of Chemistry Renmin University of China Beijing 100872 China

Calf thymus DNA was electrochemically oxidized at a multi-walled carbon nanotube modified electrode. The potentials for DNA oxidation at pH 7.0 were 0.71 and 0.81 V versus SCE, corresponding to the oxidation of guanine and adenine residues,respectively. The initial 6e-oxidation of adenine, observed in the first scan, resulted a quasi-reversible 2e-redox process of the oxidation product in the following scans.

关键词： Carbon nanotube DNA Cyclic voltammetry Reversible

Intrinsic anomalous spin Hall effect

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2023年第2期66卷 115-121页

作者： Ping Li Jing-Zhao Zhang zhi-xin guo Tai Min Xiangrong Wang State Key Laboratory for Mechanical Behavior of Materials Centerfor Spintronicsand Quantum SystemSchool of Materials Science and EngineeringXi'an Jiaotong UniversityXi'an 710049China Key Laboratory for Computational Physical Sciences(Ministry of Education) Fudan UniversityShanghai 200433China Physics Department The Hong Kong University of Science and TechnologyHong Kong 999077China The Hong Kong University of Science and Technology Shenzhen Research Institute Shenzhen 518057China

Charge-spin interconversion in magnetic materials is investigated by using the first-principles *** addition to the conventional spin Hall effect(SHE) that requires mutual orthogonality of the charge current,spin-flow direction,and spin polarization,the recently proposed anomalous SHE(ASHE) is confirmed in Mn2Au and *** interaction of the order parameter with conduction electrons leads to sizeable non-zero spin Berry curvatures that give rise to anomalous spin Hall conductivity(ASHC).Our calculations show that the ASHE is intrinsic and originates from the order-parameter-controlled spin-orbit interaction,which generates an extra anomalous effective field.A useful relationship among the order parameter,the spin Berry curvature,and the ASHC is *** findings provide a new avenue for generating and detecting arbitrary types of spin currents.

关键词： field Berry effect

Layer-by-layer electrostatic selfassembly of anionic and cationic carbon nanotubes

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2010年第7期21卷 876-879页

作者： Yu Jun Qin You You Wang Ming Xue Tang zhi xin guo Department of Chemistry Renmin University of ChinaBeijing 100872China

The layer-by-layer(LBL) self assembly of anionic and cationic multi-walled carbon nanotubes(MWNTs) through electrostatic interaction has been carried out to fabricate all-MWNT multilayer *** alternate uniform assembly of anionic and cationic MWNTs was investigated by UV-vis *** electron microscopy(SEM) images displayed the growth of the MWNT films.

关键词： Carbon nanotubes Layer-by-layer self-assembly Thin film

The fabrication of flower-like graphene/octadecylamine composites

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2015年第9期26卷 1144-1146页

作者： Yao Chen xin-Wei Dou Meng-Meng Zhang Xuan Lu Yu-Jun Qin Pu Zhang zhi-xin guo Department of Chemistry Renmin University of China

Three-dimensional flower-like nanomaterials have wide application due to the large specific surface *** this letter,the morphology of octadecylamine（ODA） from several common solvents is studied and it is found that from the chloroform and acetone solution,ODA assembles into petal-like structure,which further forms the spherical or flower-like ***,the composite materials incorporated reduced graphene oxide（rGO） and ODA could well keep the flower-shaped structure of *** results show that the introduction of graphene has little influence on the structure of ODA and contact angle test indicates good hydrophobic performance of the rGO/ODA material.

关键词： Graphene Octadecylamine Flower-like Composite

Distribution of nimodipine in brain following intranasal administration in rats

在线全文

学校读者我要写书评

暂无评论

Acta Pharmacologica Sinica 2004年第4期25卷 124-129页

作者： Qi-zhi ZHANG, xin-guo JIANG2, Chun-hua WU Department of Pharmaceutics, School ofPharmacy, Fudan University, Shanghai 200032, China Department of Pharmaceutics School of Pharmacy Fudan University

AIM: To determine whether nasally applied nimodipine (NM) could improve its systemic bioavailability and be transported directly from the nasal cavity to the brain. METHODS: NM was administered nasally, intravenously (iv), and orally to male Sprague-Dawley rats. At different times post dose, blood, cerebrospinal fluid (CSF), and brain tissue samples were collected, and the concentrations of NM in the samples were analyzed byHPLC. RESULTS: Oral systemic bioavailability of NM in rats was 1.17 %, nasal dosing improved bioavailibility to 67.4 %. Following intranasal administration, NM concentrations in olfactory bulb (OB) within 30 min post dose were found significant higher than in the other brain tissues. However, similar NM levels in different brain regions were observed after iv injection. AUC in CSF and OB from the nasal route was 1.26 and 1.39 fold compared with the iv route, respectively. The brain-to-plasma AUC ratios were significantly higher after nasal administration than after iv administration (P<0.01). CONCLUSION: Nasally administered NM could markedly improve the bioavailability and a fraction of the NM dose could be transported into brain via the olfactory pathway in rats.

关键词： intranasal administration nimodipine olfactory bulb olfactory pathways

Strengthened graphene oxide/diazoresin multilayer composites from layer-by-layer assembly and cross-linking

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2015年第9期26卷 1155-1157页

作者： Xian-He Huang Meng-Meng Zhang xin-Wei Dou Xuan Lu Yu-Jun Qin Pu Zhang Jia-Hua Shi zhi-xin guo Department of Chemistry Renmin University of China Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province Institute of Fine Chemical and EngineeringHenan University

The layer-by-layer assembly of graphene oxide and diazoresin is carried out via the electrostatic and hydrogen bond interactions on planar substrates and colloidal *** successful planar and spherical growth of multilayer could be investigated by UV-vis spectrophotometry and scanning electron microscopy,*** UV irradiation or heating would convert the ionic bonds and hydrogen bonds to covalent bands,which significantly improves the stability of the multilayer composite against solvent *** the cross-linked core-shell composites,the template cores could be removed by dissolution and hollow microspheres are obtained.

关键词： Graphene oxide Diazoresin Layer-by-layer assembly Cross-linking

Gold nanoparticles/carbon nanotubes composite microspheres for catalytic reduction of 4-nitrophenol

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2016年第6期27卷 843-846页

作者： Sheng Liu Xiao-Lin Zhou Meng-Meng Zhang Xuan Lu Yu-Jun Qin Pu Zhang zhi-xin guo Department of Chemistry Renmin University of China

The layer-by-layer assembly of polyethyleneimine and carbon nanotubes is carried out through the electrostatic interactions on colloidal polystyrene templates. The successful spherical growth of polyethyleneimine/carbon nanotube multilayers could be investigated by SEM. The subsequent in situ preparation and deposition of gold nanoparticles on the core–shell composites could yield novel microsphere complexes, which are characterized by SEM, TEM, EDX and XRD. The functional hierarchical microspheres with gold nanoparticles exhibit good catalytic activity in the reaction of reducing 4-nitrophenol to 4-aminophenol.

关键词： Carbon nanotubes Gold nanoparticles Microsphere Catalytic activity