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- Volume 6, Issue 3, 2010
Current Nanoscience - Volume 6, Issue 3, 2010
Volume 6, Issue 3, 2010
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Enhanced Solubility and Covalent Functionalisation of Single Walled Carbon Nanotubes via Atmospheric Pressure Microwave Reflux and the Subsequent Spray Coating of Transparent Conducting Thin Films
Authors: Mathew R. Waugh and Ivan P. ParkinHigh levels of covalently functionalised single walled carbon nanotubes (SWCNT) have been produced using a rapid atmospheric pressure microwave reflux in a 1:1 mix of concentrated nitric and sulphuric acids. The resulting product shows high solubility (0.74 mg/ml at pH 11) and also displays a maximum solubility dependency based on the pH of the solution. The presence of sulphone and sulphonate functional groups Read More
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Dual-template Assisted Synthesis of Silica Nanotubes
Authors: Qiulin Liao, Yexiang Wang, Yong Gao and Huaming LiSilica nanotubes were synthesized via sol-gel process using poly(ethylene glycol) functionalized multi-walled carbon nanotubes (MWNT-PEG) as the dual templates. Through the hydrolysis of tetraethoxysilane (TEOS), a continuous coating of silica was deposited over the MWNT surfaces to form core-shell structures. Hollow silica nanotubes were finally obtained by removal of core carbon components through calcination. The as-p Read More
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Young's Modulus of Nanowires Measured by Electrostatic Attraction: Application to Multi-Walled Carbon Nanotubes
Authors: Christophe Le Touze, Hsiu-Lun Yeh and Chuen-Horng TsaiAn electrostatic experiment, performed inside a Field-Emission Scanning Electron Microscope equipped with two electrical probes, is used for the accurate determination of the Young's modulus of as-grown nanowires. One electrode being in contact with the substrate and the other one at close distance to the nanowire's tip, an electrical bias was slowly ramped up to attract and eventually bring the nanowire into contact wi Read More
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Effect of TiO2 Nanotube Morphology on the Formation of Apatite Layer in Simulated Body Fluid
Authors: Yanqin Liang, Xianjin Yang, Zhenduo Cui and Shengli ZhuThe objective of this work is to discuss the microstructural effect of TiO2 nanotubes on formation mechanism and morphology of apatite layer. An anodization method was employed to prepare self-organized TiO2 nanotubes on the surface of pure titanium, followed by these substrates being soaked in simulated body fluid (SBF) to form a bioactive layer. By manipulating the anodization time between 0.5 h and 3 h, nanotubes c Read More
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Self-Assembled Superlattices from Colloidal TiO2 Nanorods
Authors: Bo Ye, Guodong Qian, Xianping Fan and Zhiyu WangThe self-assembly of anatase TiO2 nanorods into 1D (ribbon), 2D (smectic, domino, honeycomb) and 3D (lamellar) liquidcrystalline ordered superlattices is a process that depends on the collaboration between evaporation dynamics and directional interactions. Herein, the roles of entropic depletion attractions and energetic dipole-dipole couplings between TiO2 nanorods in self-assembly process are particularly em Read More
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Characterization and Formation Process of Highly Crystallized Single Crystalline TiO2 Nanorods for Dye-Sensitized Solar Cells
Authors: Takehiro Kurata, Yasushige Mori, Seiji Isoda, Jinting Jiu, Katsumi Tsuchiya, Fumio Uchida and Motonari AdachiHighly crystallized titania nanorods were prepared by a hydrothermal method, and their formation processes were investigated by characterizing reaction products in a series of desired time intervals by X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), selected-area electron diffraction (SAED), and scanning electron microscopy (SEM). A compl Read More
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β—lactam Functionalized Poly(isoprene-b-ethylene oxide) Amphiphilic Block Copolymer Micelles as a New Nanocarrier System for Curcumin
Curcumin is a natural compound with biological activities and potent anticancer effects that has the drawback of poor water solubility which leads to low bioavailability. In this work curcumin was formulated in new physicochemically characterized micellar carriers composed of new synthetic block copolymers. The study of the in vitro release rate of curcumin from the formulas, as well as the in vitro activity of free curcumin a Read More
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A “Nano-Dial” Molecular Computing Model Based on Circular DNA
Authors: Cheng Zhang, Jing Yang, Jin Xu and Shudong WangA novel molecular computing model based on circular DNA was developed to solve a 3-coloring graph problem. This computing model uses circular DNA and works as to dial a number. The method of selecting true solutions is similar to dialing on a telephone. Moreover, the key methods in this model were circularization of single single-strand DNA (ssDNA) molecules and a backtracking deletion algorithm. In the course of compu Read More
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Direct Imaging of Apoptosis Process of Neural Stem Cells Exposed to Porous Silica Nanoparticles
Authors: Yanli Wang, Shun Tan, Jia Wang, Qiuxia Wu, Xinxin Chen, Xiaoyong Deng, Qiong Lu and Minghong WuThe present study was designed to examine the uptake, localization, and the cytotoxic effects of well-dispersed fluorescent porous silica nanoparticles (FITC-SiO2 NPs) in mouse neural stem cells (C 17.2, NSCs). NSCs were exposed to various concentrations of FITC-SiO2 NPs for different times and then the uptake and toxicity were assessed. Apoptotic cells were observed and analyzed by confocal microscopy and Read More
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Self-aggregated Nanoparticles of Cholesterol-modified Pullulan Conjugate as a Novel Carrier of Mitoxantronep
Cholesterol-modified pullulan (CHSP) conjugate with succinyl linkages was synthesized and characterized by fourier transform infrared (FT-IR), proton nuclear magnetic resonance (1H NMR) and X-ray diffraction (XRD). The degree of substitution (DS) of cholesterol moiety determined by 1H NMR ranged from 3.87 to 5.70 cholesterol groups per hundred glucose units. CHSP self-aggregated nanoparticles were prepared by pro Read More
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Hydroxylated Dendrimer-Stabilized Gold and Silver Nanoparticles: Spontaneous Formation, Characterization, and Surface Properties
Authors: Mingwu Shen, Kai Sun and Xiangyang ShiWe present a general route to the facile and spontaneous synthesis of gold (Au) and silver (Ag) nanoparticles (NPs) through the use of hydroxylated poly(amidoamine) (PAMAM) dendrimers as both stabilizers and reducing agents. The formation of Au NPs can be achieved by simply mixing the generation 4 (G4) and 5 (G5) glycidol-modified PAMAM dendrimers with HAuCl4 in either methanol or water at room temperature. The si Read More
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Angular Distribution of Cu Ions by Nd:YAG Laser Using Faraday Cups
Authors: Rabia Qindeel, Noriah Bidin, Zuhairi Ibrahim, Yaacob Mat Daud and Nur-ShahidahThe infrared radiation from Nd:YAG laser (1604 nm, 8ns, 125mJ, 15.6MW) is focused by IR lens (20cm) to irradiate Cu (99.99%) target in air. The angular distribution and arrival of ions are collected by Faraday Cups (FC). For anisotropic investigation, the cups are arranged at different positions (5cm and 10cm) from the target at different angles (5°, 30°, 45°, 60° and 90°) with respect to the normal on target surface. Faraday Cu Read More
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Reflection on Existence of Neural and Non-Neural Pathway for Nose- to- Brain Using a Novel Formulation of an Anticholinesterase Piperidine Derivative
Authors: Javed Ali, Mushir Ali, Sanjula Baboota, Rashid Ali, Gaurav Mittal, Aseem Bhatnagar and BhavnaIntroduction: Intranasal drug administration is a non-invasive method of bypassing the blood—brain barrier (BBB) to deliver therapeutic agents to the brain and spinal cord. This method also delivers those drugs that do not cross the BBB to the central nervous system (CNS) thus eliminating the need for systemic delivery, and subsequently reducing the unwanted systemic side effects. Delivery from the nose- to-brain occurs withi Read More
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Nanostructure Thin Films of Titanium Dioxide Coated on Glass and Its Anti UV Effect for Living Organisms
More LessThe increasing use of ultraviolet (UV) light in medicine, industrial environments, for cosmetic use, and even in consumer products necessitates that greater attention be paid to the potential hazards of this type of electromagnetic radiation. To avoid any adverse effects of exposure to this type of radiation, suitable protection filters were produced to block UV bands. Nanostructure composite and thin film of titanium dioxide coating Read More
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Volumes & issues
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Volume 21 (2025)
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Volume 20 (2024)
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Volume 19 (2023)
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Volume 18 (2022)
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Volume 17 (2021)
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Volume 16 (2020)
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Volume 15 (2019)
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Volume 14 (2018)
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Volume 13 (2017)
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Volume 12 (2016)
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Volume 11 (2015)
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Volume 10 (2014)
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Volume 9 (2013)
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Volume 8 (2012)
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Volume 7 (2011)
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Volume 6 (2010)
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Volume 5 (2009)
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Volume 4 (2008)
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Volume 3 (2007)
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Volume 2 (2006)
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Volume 1 (2005)
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