keyword
MENU ▼
Read by QxMD icon Read
search

nanomaterials, chemistry

keyword
https://www.readbyqxmd.com/read/28632260/visualization-of-the-protein-corona-towards-a-biomolecular-understanding-of-nanoparticle-cell-interactions
#1
Maria Kokkinopoulou, Johanna Simon, Katharina Landfester, Volker Mailänder, Ingo Lieberwirth
The use of nanocarriers in biology and medicine is complicated by the current need to understand how nanoparticles interact in complex biological surroundings. When nanocarriers come into contact with serum, proteins immediately adsorb onto their surface, forming a protein corona which defines their biological identity. Although the composition of the protein corona has been widely determined by proteomics, its morphology still remains unclear. In this study we show for the first time the morphology of the protein corona using transmission electron microscopy...
June 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28620178/collision-induced-activation-towards-industrially-scalable-approach-to-graphite-nanoplatelets-functionalization-for-superior-polymer-nanocomposites
#2
Omid Zabihi, Mojtaba Ahmadi, Tahereh Abdollahi, Saeid Nikafshar, Minoo Naebe
Scale-up manufacturing of engineered graphene-like nanomaterials to deliver the industry needs for development of high-performance polymer nanocomposites still remains a challenge. Herein, we introduce a quick and cost-effective approach to scalable production of functionalized graphite nanoplatelets using "kitchen blender" approach and Diels-Alder chemistry. We have shown that, in a solvent-free process and through a cycloaddition mechanism, maleic anhydride can be grafted onto the edge-localized electron rich active sites of graphite nanoplatelets (GNP) resulting from high collision force, called "graphite collision-induced activation"...
June 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28618993/new-perspectives-on-biomedical-applications-of-iron-oxide-nanoparticles
#3
Massimiliano Magro, Davide Baratella, Emanuela Bonaiuto, Jessica de Almeida Roger, Fabio Vianello
Iron oxide nanomaterials are considered promising tools for improved therapeutic efficacy and diagnostic applications in biomedicine. Accordingly, engineered iron oxide nanomaterials are increasingly proposed in biomedicine, and the interdisciplinary researches involving physics, chemistry, biology (nanotechnology) and medicine have led to exciting developments in the last decades. The progresses of the development of magnetic nanoparticles with tailored physico-chemical and surface properties produced a variety of clinically relevant applications, spanning from magnetic resonance imaging (MRI), drug delivery, magnetic hyperthermia, to in vitro diagnostics...
June 16, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28617586/research-progress-towards-the-practical-applications-of-lithium-sulfur-li-s-batteries
#4
Joshua Lochala, Dianying Liu, Bingbin Wu, Cynthia Robinson, Jie Xiao
The renaissance of Li-S battery technology is witnessed by the intensive R&D efforts in recent years. Although the theoretical capacity and energy of a Li-S battery is theoretically very high, the projected usable energy is expected to be no more than twice that of state-of-art Li-ion batteries, or 500 Wh/kg. The recent "sulfur fever" has certainly gathered new knowledge on sulfur chemistry and electrochemistry, electrolytes, lithium metal and their interactions in this "new" system; however, a real advance towards a practical Li-S battery is still missing...
June 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28604901/flow-directed-synthesis-of-spatially-variant-arrays-of-branched-zinc-oxide-mesostructures
#5
Abhiteja Konda, Stephen A Morin
The use of fluid flow to control crystal morphology during the liquid-phase synthesis of inorganic nanomaterials is a relatively under explored approach. Synthetic strategies that take advantage of flow effects present the opportunity to tune several parameters (e.g., flow velocity and direction) in addition to conventional growth parameters (e.g., time, temperature, chemistry, and concentration), and thus enable additional levels of control in the bottom-up synthesis of nanomaterials. The current work reports the application of microfluidics to the rational synthesis of spatially variant arrays of branched zinc oxide (ZnO) nanorods with predictable morphological and compositional characteristics...
June 12, 2017: Nanoscale
https://www.readbyqxmd.com/read/28600894/gluing-ionic-liquids-to-oxide-surfaces-chemical-anchoring-of-functionalized-ionic-liquids-by-vapor-deposition-onto-cobalt-ii-oxide
#6
Tao Xu, Tobias Waehler, Julia Vecchietti, Adrian Bonivardi, Tanja Bauer, Johannes Schwegler, Peter Steffen Schulz, Peter Wasserscheid, Jörg Libuda
Ionic liquids (IL) hold a great potential as novel electrolytes for applications in electronic materials and energy technology. The functionality of ILs in these applications relies on their interface to semiconducting nanomaterials. Therefore, methods to control the chemistry and structure of this interface are the key to assemble new IL-based electronic and electrochemical materials. Here, we present a new method to prepare a chemically well-defined interface between an oxide and an IL film. An imidazolium-based IL, which is carrying an ester group, is deposited onto cobalt oxide surface by evaporation...
June 10, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28589933/towards-colloidal-spintronics-through-rashba-spin-orbit-interaction-in-lead-sulphide-nanosheets
#7
Mohammad Mehdi Ramin Moayed, Thomas Bielewicz, Martin Sebastian Zöllner, Carmen Herrmann, Christian Klinke
Employing the spin degree of freedom of charge carriers offers the possibility to extend the functionality of conventional electronic devices, while colloidal chemistry can be used to synthesize inexpensive and tunable nanomaterials. Here, in order to benefit from both concepts, we investigate Rashba spin-orbit interaction in colloidal lead sulphide nanosheets by electrical measurements on the circular photo-galvanic effect. Lead sulphide nanosheets possess rock salt crystal structure, which is centrosymmetric...
June 7, 2017: Nature Communications
https://www.readbyqxmd.com/read/28589852/editorial-medicinal-chemistry-of-nanomaterials-for-cancer-theranostics
#8
EDITORIAL
Feng Liang, Chao Zhang
No abstract text is available yet for this article.
2017: Current Topics in Medicinal Chemistry
https://www.readbyqxmd.com/read/28567259/photothermal-enhanced-catalysis-in-core-shell-plasmonic-hierarchical-cu7s4-microsphere-zeolitic-imidazole-framework-8
#9
Feifan Wang, Yanjie Huang, Zhigang Chai, Min Zeng, Qi Li, Yuan Wang, Dongsheng Xu
Conventional semiconductor photocatalysis based on band-edge absorption remains inefficient due to the limited harvesting of solar irradiation and the complicated surface/interface chemistry. Herein, novel photothermal-enhanced catalysis was achieved in a core-shell hierarchical Cu7S4 nano-heater@ZIF-8 heterostructures via near-infrared localized surface plasmon resonance. Our results demonstrated that both the high surface temperature of the photothermal Cu7S4 core and the close-adjacency of catalytic ZIF-8 shell contributed to the extremely enhanced catalytic activity...
December 1, 2016: Chemical Science
https://www.readbyqxmd.com/read/28564630/green-chemical-approach-towards-the-synthesis-of-ceo2-doped-with-seashell-and-its-bacterial-applications-intermediated-with-fruit-extracts
#10
Mariadas Valan Arasu, R Thirumamagal, M P Srinivasan, Naif Abdullah Al-Dhabi, A Ayeshamariam, D Saravana Kumar, N Punithavelan, M Jayachandran
Nanomaterials of CeO2 with A. vera were synthesized by using simple chemical method. Grapes drops are used as an oxidizing agent. Structural and morphological studies of nanomaterials of cerium oxide (CeO2), were studied for combustion method of preparation. The precursor solution was initialized by a hydrothermal reaction. Cerium hydroxyl carbonate precursors which involves cerium (III) nitrate Ce(NO3)3. 6 H2O with (1.0M) of seashell powder, 3% A. vera, extracts, grapes and pomegranate drops and this complex solution was used to produce the CeO2 powder particles...
May 24, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28557331/understanding-the-effect-of-surface-chemistry-of-mesoporous-silica-nanorods-on-their-vaccine-adjuvant-potency
#11
Yannan Yang, Manasi Jambhrunkar, Prasanna Lakshmi Abbaraju, Meihua Yu, Min Zhang, Chengzhong Yu
Mesoporous silica nanoparticles are reported as adjuvants in nanovaccines in generating robust antigen-specific immunity. However, the effect of surface chemistry in initiating and modulating the immune response remains largely unexplored. In this study, mesoporous silica nanorods (MSNRs) are modified with NH2 and C18 groups to investigate the influence of surface functional groups (OH, NH2 , and C18 ) on their adjuvant efficacy. It is found that compared to OH and NH2 groups, the hydrophobic C18 modification significantly enhances antigen uptake by antigen presenting cells and endosomal-lysosomal escape in vitro, dendritic cells, and macrophages maturation ex vivo, and elicits secretion of interferon-γ level and antibody response in immunized mice...
May 29, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28534207/construction-of-polyarylenes-with-various-structural-features-via-bergman-cyclization-polymerization
#12
REVIEW
Youfu Wang, Shudan Chen, Aiguo Hu
Synthetic polymer chemistry is a fundamental part of polymer science, and highly efficient polymerization reactions are essential for the synthesis of high-performance polymers. Development of new synthetic methods for emerging polymer science is of great importance in this regard. Bergman cyclization is a chemical process in which highly reactive aryl diradicals form from enediyne precursors, having a strong impact in a number of fields including pharmaceutics, synthetic chemistry, and materials science. Diradical intermediates stemming from enediynes can cause DNA cleavage under physiological conditions, leading to the strong cytotoxicity of many naturally occurring enediyne antibiotics...
June 2017: Topics in Current Chemistry (Journal)
https://www.readbyqxmd.com/read/28531816/predicted-phototoxicities-of-carbon-nano-material-by-quantum-mechanical-calculations
#13
Don Betowski
The purpose of this research was to develop a predictive model for the phototoxicity potential of carbon nanomaterials (fullerenols and single-walled carbon nanotubes). This model is based on the quantum mechanical (ab initio) calculations on these carbon-based materials and comparison of the triplet excited states of these materials to published work relating phototoxicity of polynuclear aromatic hydrocarbons (PAH) to their predictive triplet excited state energy. A successful outcome will add another tool to the arsenal of predictive methods for the U...
March 31, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/28530806/photoluminescent-hybrids-of-cellulose-nanocrystals-and-carbon-quantum-dots-as-cytocompatible-probes-for-in-vitro-bioimaging
#14
Jiaqi Guo, Dongfei Liu, Ilari Filpponen, Leena-Sisko Johansson, Jani-Markus Malho, Sakeena Quraishi, Falk Liebner, Hélder A Santos, Orlando J Rojas
We present an approach to construct biocompatible and photoluminescent hybrid materials comprised of carbon quantum dots (CQDs) and TEMPO-oxidized cellulose nanocrystals (TO-CNCs). First, the amino-functionalized carbon quantum dots (NH2-CQDs) were synthesized using a simple microwave method, and the TO-CNCs were prepared by hydrochloric acid (HCl) hydrolysis followed by TEMPO-mediated oxidation. The conjugation of NH2-CQDs and TO-CNCs was conducted via carbodiimide-assisted coupling chemistry. The synthesized TO-CNC@CQD hybrid nanomaterials were characterized using X-ray photoelectron spectroscopy, cryo-transmittance electron microscopy, confocal microscopy, and fluorescence spectroscopy...
June 15, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28530092/fibroblast-cytophilic-and-hela-cytotoxic-dual-function-carbon-nanoribbon-network-platform
#15
A K M Rezaul Haque Chowdhury, Bo Tan, Krishnan Venkatakrishnan
Carbon nanomaterials have emerged as a promising material in cancer diagnosis and therapy. Carbon nanomaterials/nanostructures (C-C molecular structure) act as a carrier/skeleton and require further surface modification through functionalization with chemicals or biomolecules to attain cell response. We report the synthesis of a novel carbon nanoribbon network (CNRN) platform that possesses a combination of C-C and C-O bond architecture. The bioactive CNRN showed enhanced ability for cell adhesion. Most importantly, it induced opposite cell responses from healthy cells and cancerous cells, cytophilic to fibroblasts but cytotoxic to HeLa cells...
May 31, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28528626/colloid-particle-formulations-for-antimicrobial-applications
#16
REVIEW
Ahmed F Halbus, Tommy S Horozov, Vesselin N Paunov
Colloidal particles are being extensively studied in various antimicrobial applications due to their small size to volume ratio and ability to exhibit a wide spectrum of antibacterial, antifungal, antialgal and antiviral action. The present review focuses on various nanoparticles (NPs) of inorganic, organic and hybrid materials, and discusses some of the methods for their preparation as well as mechanisms of their antimicrobial action. We consider the antimicrobial applications of metal oxide nanoparticles (ZnO, MgO, CuO, Cu2O, Al2O3, TiO2, CeO2 and Y2O3), metal nanoparticles (NPs), such as copper, silver and gold, metal hydroxide NPs such as Mg(OH)2 as well as hybrid NPs made from biodegradable materials, such as chitosan, lignin and dextran, loaded with other antimicrobial agents...
May 12, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28524663/polydopamine-generates-hydroxyl-free-radicals-under-ultraviolet-light-illumination
#17
Zehuan Wang, Feng Tang, Hailong Fan, Le Wang, Zhaoxia Jin
Polydopamine (PDA) generally demonstrates as an efficient free-radical scavenger. However, its free-radical chemistry under illumination is unclear, which becomes important in view of growing studies of polydopamine applications in photoprotector and photothermal therapy. In this study, for the first time, we reported an experimental investigation of the generation of hydroxyl free radicals from ultraviolet (UV)-illuminated polydopamine in an aqueous environment. By using terephthalic acid as fluorescent probe, we measured hydroxyl radicals generated from UV-illuminated polydopamine with different shapes and sizes...
May 30, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28523917/silica-nanoparticles-functionalized-with-zwitterionic-sulfobetaine-siloxane-for-application-as-a-versatile-antifouling-coating-system
#18
Brianna R Knowles, Pawel Wagner, Shane Maclaughlin, Michael J Higgins, Paul J Molino
The growing need to develop surfaces able to effectively resist biological fouling has resulted in the widespread investigation of nanomaterials with potential antifouling properties. However, the preparation of effective antifouling coatings is limited by the availability of reactive surface functional groups and our ability to carefully control and organize chemistries at a materials' interface. Here, we present two methods of preparing hydrophilic low-fouling surface coatings through reaction of silica-nanoparticle suspensions and predeposited silica-nanoparticle films with zwitterionic sulfobetaine (SB)...
June 7, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28508053/backside-absorbing-layer-microscopy-watching-graphene-chemistry
#19
Stéphane Campidelli, Refahi Abou Khachfe, Kevin Jaouen, Jean Monteiller, Claude Amra, Myriam Zerrad, Renaud Cornut, Vincent Derycke, Dominique Ausserré
The rapid rise of two-dimensional nanomaterials implies the development of new versatile, high-resolution visualization and placement techniques. For example, a single graphene layer becomes observable on Si/SiO2 substrates by reflected light under optical microscopy because of interference effects when the thickness of silicon oxide is optimized. However, differentiating monolayers from bilayers remains challenging, and advanced techniques, such as Raman mapping, atomic force microscopy (AFM), or scanning electron microscopy (SEM) are more suitable to observe graphene monolayers...
May 2017: Science Advances
https://www.readbyqxmd.com/read/28507702/plasmon-induced-charge-separation-chemistry-and-wide-applications
#20
Tetsu Tatsuma, Hiroyasu Nishi, Takuya Ishida
Recent development of nanoplasmonics has stimulated chemists to utilize plasmonic nanomaterials for efficient and distinctive photochemical applications, and physicists to boldly go inside the "wet" chemistry world. The discovery of plasmon-induced charge separation (PICS) has even accelerated these trends. On the other hand, some confusion is found in discussions about PICS. In this perspective, we focus on differences between PICS and some other phenomena such as co-catalysis effect and plasmonic nanoantenna effect...
May 1, 2017: Chemical Science
keyword
keyword
50783
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"