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Yuanyuan Wu, Shuai Li, Jingxin Song, Bingxue Jiang, ShanShan Chen, Huimin Sun, Xinxin Li
Nano-titanium dioxide (TiO2 ) was modified with the surfactant sodium laurate (SL) via ultrasonic microwave-assisted technology to improve the dispersion of TiO2 in polymer matrices. As revealed by Fourier transform infrared spectroscopy, X-ray diffraction, and scanning electron microscopy analyses, SL was well adsorbed onto the TiO2 surface through chemical bonding, resulting in SL-modified TiO2 (TiO2 -SLx). The hydrophobicity and dispersibility of TiO2 -SLx increased significantly compared to unmodified nano-TiO2 ...
October 16, 2018: Journal of Food Science
Dilpreet Singh, Ashok K Tiwary, Neena Bedi
OBJECTIVE: The aim of the present investigation entails the development of solid SMEDDS for improving the oral bioavailability of canagliflozin using porous carriers. The previous patent (WO2017046730A1) was based on enhanced of solubility of canagliflozin through co-crystal formation. METHODS: Preconcentrates were prepared by employing Lauroglycol (80 mg), Tween 80 (300 mg) and Transcutol P (120 mg) and successfully adsorbed onto various hydrophilic and hydrophobic carriers...
October 8, 2018: Recent Patents on Drug Delivery & Formulation
Marianna Pannico, Anna Calarco, Gianfranco Peluso, Pellegrino Musto
In the present contribution the fabrication and characterization of functionalized gold nanospheres of uniform shape and controlled size is reported. These nano-objects are intended to be used as Surface Enhanced Raman Spectroscopy (SERS) sensors for in-vitro cellular uptake and localization. Thiophenol was used as molecular reporter and was bound to the Au surface by a chemisorption process in aqueous solution. The obtained colloidal solution was highly stable and no aggregation of the single nanospheres into larger clusters was observed...
October 4, 2018: Biosensors
ShuQiang Zhou, XinYu Liu, Yi Xu
NiAl-based composites reinforced by CrMnFeCoNi high-entropy alloy (HEA) particles were fabricated by mechanical alloying (MA) and spark plasma sintering (SPS). The microstructure, mechanical, and tribological properties of the NiAl-HEA composites were investigated. Microstructural analyses show that after SPS, the HEA phase homogenously distributed in the NiAl matrix. Non-uniform diffusion of various elements occurred during the high temperature sintering process. Transmission electron microscope (TEM) observation of the composites revealed that many nano particle of Al₂O₃ generated at the grain boundary...
September 28, 2018: Materials
Armin Mooranian, Nassim Zamani, Momir Mikov, Svetlana Goločorbin-Kon, Goran Stojanovic, Frank Arfuso, Hani Al-Salami
Smart polymers such as Eudragit (ED) have shown potential applications in oral drug delivery and targeted release. Probucol (PB) is a lipophilic drug used for hypercholesterolemia and possesses desirable antidiabetic effects such as antioxidant and cell protective effects. PB is highly hydrophobic and has poor bioavailability with significant inter- and intra-patient absorption, limiting its clinical applications in diabetes. This study aimed to design and analyse new PB-ED formulations with or without the absorption-enhancer chenodeoxycholic acid (CDCA)...
September 27, 2018: Artificial Cells, Nanomedicine, and Biotechnology
Min Su Kang, Hyungmok Joh, Haneun Kim, Hye-Won Yun, Donggyu Kim, Ho Kun Woo, Woo Seok Lee, Sung-Hoon Hong, Soong Ju Oh
In this work, we introduce a low cost, room-temperature and atmospheric pressure based chemical method to produce highly transparent, conductive, and flexible nano-mesh structured electrodes using Ag nanocrystals (NCs). Sequential treatments of ligand exchange and reduction processes were developed to engineer the optoelectronic properties of Ag NC thin films. Combinatorial analysis indicates that the origin of the relatively low conductivity comes from the non-metallic compounds that are introduced during ligand exchange...
October 4, 2018: Nanoscale
Hong Chen, Huizi Sha, Lianru Zhang, Hanqing Qian, Fangjun Chen, Naiqin Ding, Liulian Ji, Anqing Zhu, Qiuping Xu, Fanyan Meng, Lixia Yu, Yan Zhou, Baorui Liu
Background: There is currently much interest in cancer cell targeting and tumor penetrating for research and therapeutic purposes. Purpose: To improve targeting delivery of antitumor drugs to gastric cancer, in this study, a tumor-targeting biocompatible drug delivery system derived from erythrocyte membrane for delivering paclitaxel (PTX) was constructed. Methods: Erythrocyte membrane of human red blood cells (RBCs) were used for preparing of erythrocyte membrane-derived vesicles...
2018: International Journal of Nanomedicine
Farhana Sharmin Diba, Andrew Boden, Helmut Thissen, Mrinal Bhave, Peter Kingshott, Peng-Yuan Wang
The organization of matter into hierarchical structures is a fundamental characteristic of functional materials and living organisms. Binary colloidal crystal (BCC) systems present a diversified range of nanotopographic structures where large and small colloidal particles simultaneously self-assemble into either 2D monolayer or 3D hierarchical crystal lattices. More importantly, understanding how BCCs form opens up the possibility to fabricate more complex systems such as ternary or quaternary colloidal crystals...
August 23, 2018: Advances in Colloid and Interface Science
Haishan Jiao, Ping Cao, Ying Chen, Yuening Song, Dongyin Li, Xiaodong Wang
Objective: To prepare nano polypyrrole (PPy)/chitin composite membrane and observe their biocompatibility. Methods: The nano PPy was synthesized by microemulsion polymerization, blended with chitosan and then formed membranes. The membranes were then modified by acetylation to get the experimental membranes (nano PPy/chitin composite membranes, group A). The chitosan membranes (group B) and chitin ones (group C) modified by acetylation acted as control. Scanning electron microscopy and FT-IR spectra were used to identify the nano PPy and the membranes of each group...
August 1, 2018: Chinese Journal of Reparative and Reconstructive Surgery
Mi Zhang, Yu Gao, Yixing Zhan, Xiaoqing Ding, Ming Wang, Xinlong Wang
Degradable, flame retardant, and flexible nanocomposite films with low dielectric constant were prepared with poly (lactic acid) (PLA), nano ZIF-8@GO, and degradable flame-retardant resorcinol di(phenyl phosphate) (RDP). The SEM results of the fractured surfaces indicated that ZIF-8@GO and RDP were dispersed uniformly in the PLA matrix. The prepared films had good mechanical properties and the tensile strength of the film with 1.5 wt% of ZIF-8@GO was increased to 48.2 MPa, compared with 38.5 MPa of pure PLA...
September 18, 2018: Materials
Min Ju Kim, Kwanyong Pak, Wan Sik Hwang, Sung Gap Im, Byung Jin Cho
Organic-inorganic hybrid dielectrics have attracted considerable attention for improving both the dielectric constant ( k) and mechanical flexibility of the gate dielectric layer for emerging flexible and wearable electronics. However, conventional solution-based hybrid materials, such as nanocomposite and self-assembled nanodielectrics, have limitations in the dielectric quality when the thickness is deep-scaled, which is critical to realizing high-performance flexible devices. This study proposes a novel vapor-phase synthesis method to form an ultrathin, homogeneous, high- k organic-inorganic hybrid dielectric...
September 28, 2018: ACS Applied Materials & Interfaces
Lijun Luo, Lihong Xia, Wei Tan, Junhong Li, Colin J Barrow, Wenrong Yang, Hongbin Wang, Li Shu
In this work, TiO2 (B) nano-belts were synthesized by hydrothermal method under stirring, and static conditions and preparation conditions were optimized. The prepared materials were characterized by scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), photoluminescence spectroscopy (PL), and N2 adsorption/desorption measurement. The photocatalytic performance was evaluated by removing synthetic estrogen 17α-ethynylestradiol (EE2), which is the most potent endocrine-disrupting chemical...
September 17, 2018: Environmental Science and Pollution Research International
S Dobroiu, F C M J M van Delft, J Aveyard-Hanson, Prasad Shetty, D V Nicolau
Continuous improvements of the fluorescence-based sensitivity and specificity, required for high throughput screening, diagnostics, and molecular biology studies, are usually addressed by better readout systems, or better reporting elements. However, while Fluorescence Interference Contrast (FLIC), which modulates the fluorescence by materials-based parameters, has been used for decades to measure biomolecular interactions at nanometer-precision, e.g., for the study of molecular motors and membrane processes, it has been seldom used for high throughput or diagnostic microdevices...
September 7, 2018: Biosensors & Bioelectronics
Monica Louise T Triviño, Vishwanath Hiremath, Jeong Gil Seo
NaNO3 -promoted MgO sorbents are known to achieve enhanced CO2 sorption uptake but fail to maintain their capacity after multiple sorption-regeneration cycles. In this study, commercially available hydrotalcites (Pural Mg30, Pural Mg70, and synthetic hydrotalcite) were used as stabilizers for NaNO3 -impregnated MgO (MgONaNO3 ) sorbents to improve their cyclic stability. Results show that the Mg30-stabilized MgONaNO3 attained higher and stable overall CO2 sorption performance as compared to bare MgONaNO3 after multiple sorption cycles...
September 27, 2018: Environmental Science & Technology
Marco V Nardi, Melanie Timpel, Giovanni Ligorio, Nicolas Zorn Morales, Andrea Chiappini, Tullio Toccoli, Roberto Verucchi, Riccardo Ceccato, Luca Pasquali, Emil J W List-Kratochvil, Alberto Quaranta, Sandra Dirè
Transition metal dichalcogenides, such as molybdenum disulfide (MoS2 ), show peculiar chemical/physical properties that enable their use in applications ranging from micro- and nano-optoelectronics to surface catalysis, gas and light detection, and energy harvesting/production. One main limitation to fully harness the potential of MoS2 is given by the lack of scalable and low environmental impact synthesis of MoS2 films with high uniformity, hence setting a significant challenge for industrial applications...
October 10, 2018: ACS Applied Materials & Interfaces
Hyun June Moon, Minhee Ku, Hyunjee Lee, Nara Yoon, Jaemoon Yang, Ki Wan Bong
Gold nanorods (GNRs) are of great interest in cancer therapy given their ability to ablate tumor cells using deep tissue-penetrating near-infrared light. GNRs coated with tumor-specific moieties have the potential to target tumor tissue to minimize damage to normal tissue. However, perfect targeting is difficult to achieve given that nanoparticles could be broadly dispersed inside the body. Moreover, interaction between targeting groups and biological molecules could lower targeting abilities, resulting in off-target accumulation which might produce nanotoxicity...
September 12, 2018: Scientific Reports
Shingo Maruyama, Ida Bagus Hendra Prastiawan, Kaho Toyabe, Yuji Higuchi, Tomoyuki Koganezawa, Momoji Kubo, Yuji Matsumoto
Thin film approaches are powerful methods for gaining a nanoscale understanding of interfacial ionic liquids (ILs) in the vicinity of solids. These approaches are used to directly elucidate the interfacial contributions to the physical properties of ILs as nanoscale thin films have significant proportions of the surface or interface region with respect to their total volume. Here, we report the growth of a uniform [emim][TFSA] thin film ionic liquid on a chemically modified, well-wettable sapphire, thereby allowing the in situ measurement of its ionic conductivity on the nanoscale...
September 14, 2018: ACS Nano
Sunil P Lonkar, Vishnu V Pillai, Saeed M Alhassan
A facile and eco-friendly strategy is described for the synthesis of ZnS-ZnO/graphene heterostructured nano-photocatalysts for the first time. This solvent-free and technologically scalable method involves solid-state mixing of graphite oxide (GO), Zn salt and surfeit yet non-toxic elemental sulfur using ball-milling followed by thermal annealing. The as-formed hybrids are composed of uniformly distributed in-situ formed ZnS-ZnO nanoparticles simultaneously within the thermally reduced GO (graphene) matrix...
September 7, 2018: Scientific Reports
Zan Li, Haotian Wang, Qiang Guo, Zhiqiang Li, Ding-Bang Xiong, Yishi Su, Huajian Gao, Xiaoyan Li, Di Zhang
Grain refinement to the nano/ultrafine-grained regime can make metals several times stronger, but this process is usually accompanied by a dramatic loss of ductility. Such strength-ductility trade-off originates from a lack of strain-hardening capacity in tiny grains. Here, we present a strategy to regain the strain-hardening ability of high-strength metals by incorporation of extrinsic nanofillers at grain boundaries. We demonstrate that the dislocation storage ability in Cu grains can be considerably improved through this novel grain-boundary engineering approach, leading to a remarkably enhanced strain-hardening capacity and tensile ductility (uniform elongation)...
September 12, 2018: Nano Letters
Mohammad Fathi Tovini, Bhushan Patil, Cevriye Koz, Tamer Uyar, Eda Yılmaz
A 3D RuO2 /Mn2 O3 /carbon nanofiber (CNF) composite has been prepared in this study by a facile two step microwave synthesis, as a bi-functional electrocatalyst towards oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). RuO2 nanoparticles with the mean size of 1.57 nm are uniformly distributed on Mn2 O3 nano-rods grown on electrospun CNFs. The electrocatalytic activity of the composites are investigated towards ORR/OER under alkaline condition. The ternary RuO2 /Mn2 O3 /CNF composite showed superior ORR activity in terms of onset potential (0...
November 23, 2018: Nanotechnology
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