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https://www.readbyqxmd.com/read/28306244/recent-advances-in-ultrathin-two-dimensional-nanomaterials
#1
Chaoliang Tan, Xiehong Cao, Xue-Jun Wu, Qiyuan He, Jian Yang, Xiao Zhang, Junze Chen, Wei Zhao, Shikui Han, Gwang-Hyeon Nam, Melinda Sindoro, Hua Zhang
Since the discovery of mechanically exfoliated graphene in 2004, research on ultrathin two-dimensional (2D) nanomaterials has grown exponentially in the fields of condensed matter physics, material science, chemistry, and nanotechnology. Highlighting their compelling physical, chemical, electronic, and optical properties, as well as their various potential applications, in this Review, we summarize the state-of-art progress on the ultrathin 2D nanomaterials with a particular emphasis on their recent advances...
March 17, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/28295556/core-chemistry-influences-the-toxicity-of-multi-component-metal-oxide-nanomaterials-lithium-nickel-manganese-cobalt-oxide-and-lithium-cobalt-oxide-to-daphnia-magna
#2
Jared Bozich, Mimi Hang, Robert Hamers, Rebecca Klaper
Lithium intercalation compounds such as lithium nickel manganese cobalt oxide (NMC) and lithium cobalt oxide (LCO) are used extensively in lithium batteries. Because there is currently little economic incentive for recycling, chances are greater that batteries will end up in landfills or waste in the environment. In addition, the toxicity of these battery materials has not been traditionally part of the design process. Therefore, to determine the environmental impact and the possibility of alternative battery materials, representative complex battery nanomaterials, LCO and NMC, were synthesized and toxicity was assessed in Daphnia magna...
March 11, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28288893/redox-responsive-theranostic-nanoplatforms-based-on-inorganic-nanomaterials
#3
Lu Han, Xiao-Yong Zhang, Yu-Long Wang, Xi Li, Xiao-Hong Yang, Min Huang, Kun Hu, Lu-Hai Li, Yen Wei
Spurred on by advances in materials chemistry and nanotechnology, scientists have developed many novel nanopreparations for cancer diagnosis and therapy. To treat complex malignant tumors effectively, multifunctional nanomedicines with targeting ability, imaging properties and controlled drug release behavior should be designed and exploited. The therapeutic efficiency of loaded drugs can be dramatically improved using redox-responsive nanoplatforms which can sense the differences in the redox status of tumor tissues and healthy ones...
March 10, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28287138/biofunctionalized-3-d-carbon-nano-network-platform-for-enhanced-fibroblast-cell-adhesion
#4
A K M Rezaul Haque Chowdhury, Amirhossein Tavangar, Bo Tan, Krishnan Venkatakrishnan
Carbon nanomaterials have been investigated for various biomedical applications. In most cases, however, these nanomaterials must be functionalized biologically or chemically due to their biological inertness or possible cytotoxicity. Here, we report the development of a new carbon nanomaterial with a bioactive phase that significantly promotes cell adhesion. We synthesize the bioactive phase by introducing self-assembled nanotopography and altered nano-chemistry to graphite substrates using ultrafast laser...
March 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28281264/resonance-energy-transfer-based-nucleic-acid-hybridization-assays-on-paper-based-platforms-using-emissive-nanoparticles-as-donors
#5
Samer Doughan, M Omair Noor, Yi Han, Ulrich J Krull
Quantum dots (QDs) and upconverting nanoparticles (UCNPs) are luminescent nanoparticles (NPs) commonly used in bioassays and biosensors as resonance energy transfer (RET) donors. The narrow and tunable emissions of both QDs and UCNPs make them versatile RET donors that can be paired with a wide range of acceptors. Ratiometric signal processing that compares donor and acceptor emission in RET-based transduction offers improved precision, as it accounts for fluctuations in the absolute photoluminescence (PL) intensities of the donor and acceptor that can result from experimental and instrumental variations...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28274115/progress-in-nanotheranostics-based-on-mesoporous-silica-nanomaterial-platforms
#6
Rajendra K Singh, Kapil D Patel, Kam W Leong, Hae-Won Kim
Theranostics based on nanoparticles (NPs) is a promising paradigm in nanomedicine. Mesoporous silica nanoparticle (MSN)-based systems offer unique characteristics to enable multimodal imaging or simultaneous diagnosis and therapy. They include large surface area and volume, tunable pore size, functionalizable surface, and acceptable biological safety. Hybridization with other NPs and chemical modification can further potentiate the multifunctionality of MSN-based systems toward translation. Here, we update the recent progress on MSN-based systems for theranostic purposes...
March 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28272443/effective-construction-of-high-quality-iron-oxy-hydroxides-and-co-doped-iron-oxy-hydroxides-nanostructures-towards-the-promising-oxygen-evolution-reaction-application
#7
Xinyu Zhang, Li An, Jie Yin, Pinxian Xi, Zhiping Zheng, Yaping Du
Rational design of high efficient and low cost electrocatalysts for oxygen evolution reaction (OER) plays an important role in water splitting. Herein, a general gelatin-assisted wet chemistry method is employed to fabricate well-defined iron oxy-hydroxides and transitional metal doped iron oxy-hydroxides nanomaterials, which show good catalytic performances for OER. Specifically, the Co-doped iron oxy-hydroxides (Co0.54Fe0.46OOH) show the excellent electrocatalytic performance for OER with an onset potential of 1...
March 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28252939/rapid-formation-of-metal-organic-frameworks-mofs-based-nanocomposites-in-microdroplets-and-their-applications-for-co2-photoreduction
#8
Xiang He, Zhuoran Gan, Sergey Fisenko, Dawei Wang, Hani M El-Kaderi, Wei-Ning Wang
A copper-based metal-organic framework (MOF), [Cu3(TMA)2(H2O)3]n (also known as HKUST-1, where TMA stands for trimesic acid), and its TiO2 nanocomposites were directly synthesized in micrometer-sized droplets via a rapid aerosol route for the first time. The effects of synthesis temperature and precursor component ratio on the physicochemical properties of the materials were systematically investigated. Theoretical calculations on the mass and heat transfer within the microdroplets revealed that the fast solvent evaporation and high heat transfer rates are the major driving forces...
March 10, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28252133/binary-halide-ternary-perovskite-like-and-perovskite-derivative-nanostructures-hot-injection-synthesis-and-optical-and-photocatalytic-properties
#9
Suh-Ciuan Lim, Hsuan-Peng Lin, Wei-Lun Tsai, Hao-Wu Lin, Yao-Tsung Hsu, Hsing-Yu Tuan
A variety of crystalline colloid binary halide, ternary perovskite-like and ternary perovskite-derivative nanostructures with well-defined morphologies were synthesized, thus expanding materials chemistry to the new category of nanomaterials. The optical and photocatalytic properties of ternary nanostructures were investigated.
March 2, 2017: Nanoscale
https://www.readbyqxmd.com/read/28247966/understanding-surface-and-interfacial-chemistry-in-functional-nanomaterials-via-solid-state-nmr
#10
REVIEW
Alessandro Marchetti, Juner Chen, Zhenfeng Pang, Shenhui Li, Daishun Ling, Feng Deng, Xueqian Kong
Surface and interfacial chemistry is of fundamental importance in functional nanomaterials applied in catalysis, energy storage and conversion, medicine, and other nanotechnologies. It has been a perpetual challenge for the scientific community to get an accurate and comprehensive picture of the structures, dynamics, and interactions at interfaces. Here, some recent examples in the major disciplines of nanomaterials are selected (e.g., nanoporous materials, battery materials, nanocrystals and quantum dots, supramolecular assemblies, drug-delivery systems, ionomers, and graphite oxides) and it is shown how interfacial chemistry can be addressed through the perspective of solid-state NMR characterization techniques...
March 1, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28243570/nanoscale-isoindigo-carriers-self-assembly-and-tunable-properties
#11
Tatiana N Pashirova, Andrei V Bogdanov, Lenar I Musin, Julia K Voronina, Irek R Nizameev, Marsil K Kadirov, Vladimir F Mironov, Lucia Ya Zakharova, Shamil K Latypov, Oleg G Sinyashin
Over the last decade isoindigo derivatives have attracted much attention due to their high potential in pharmacy and in the chemistry of materials. In addition, isoindigo derivatives can be modified to form supramolecular structures with tunable morphologies for the use in drug delivery. Amphiphilic long-chain dialkylated isoindigos have the ability to form stable solid nanoparticles via a simple nanoprecipitation technique. Their self-assembly was investigated using tensiometry, dynamic light scattering, spectrophotometry, and fluorometry...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28238734/drug-releasing-nanoplatforms-activated-by-alternating-magnetic-fields
#12
REVIEW
Damien Mertz, Olivier Sandre, Sylvie Bégin-Colin
The use of an alternating magnetic field (AMF) to generate non-invasively and spatially a localized heating from a magnetic nano-mediator has become very popular these last years to develop magnetic hyperthermia (MH) as a promising therapeutic modality already used in the clinics. AMF has become highly attractive this last decade over others radiations, as AMF allows a deeper penetration in the body and a less harmful ionizing effect. In addition to pure MH which induces tumor cell death through local T elevation, this AMF-generated magneto-thermal effect can also be exploited as a relevant external stimulus to trigger a drug release from drug-loaded magnetic nanocarriers, temporally and spatially...
February 24, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28229590/impacts-of-cross-linkers-on-biological-effects-of-mesoporous-silica-nanoparticles
#13
Yi-Ping Chen, Si-Han Wu, I-Chih Chen, Chien-Tsu Chen
Chemically synthesized cross-linkers play decisive roles in variable cargos attached to nanoparticles (NPs). Previous studies reported that surface properties, such as the size, charge, and surface chemistry, are particularly important determinants influencing the biological fate and actions of NPs and cells. Recent studies also focused on the relationship of serum proteins with the surface properties of NPs (also called the protein corona), which is recognized as a key factor in determining the cytotoxicity and biodistribution...
March 7, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28225818/heat-induced-radiolabeling-and-click-chemistry-a-powerful-combination-for-generating-multifunctional-nanomaterials
#14
Hushan Yuan, Moses Q Wilks, Georges El Fakhri, Marc D Normandin, Charalambos Kaittanis, Lee Josephson
A key advantage of nanomaterials for biomedical applications is their ability to feature multiple small reporter groups (multimodality), or combinations of reporter groups and therapeutic agents (multifunctionality), while being targeted to cell surface receptors. Here a facile combination of techniques for the syntheses of multimodal, targeted nanoparticles (NPs) is presented, whereby heat-induced-radiolabeling (HIR) labels NPs with radiometals and so-called click chemistry is used to attach bioactive groups to the NP surface...
2017: PloS One
https://www.readbyqxmd.com/read/28215075/iron-oxide-surface-chemistry-effect-of-chemical-structure-on-binding-in-benzoic-acid-and-catechol-derivatives
#15
Katalin V Korpany, Dorothy D Majewski, Cindy T Chiu, Shoronia N Cross, Amy Szuchmacher Blum
The excellent performance of functionalized iron oxide nanoparticles (IONPs) in nanomaterial and biomedical applications often relies on achieving the attachment of ligands to the iron oxide surface both in sufficient number and with proper orientation. Toward this end, we determine relationships between the ligand chemical structure and surface binding on magnetic IONPs for a series of related benzoic acid and catechol derivatives. Ligand exchange was used to introduce the model ligands, and the resultant nanoparticles were characterized using Fourier transform infrared-attenuated internal reflectance spectroscopy, transmission electron microscopy, and nanoparticle solubility behavior...
March 13, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28206749/graphene-intermetallic-ptpb-nanoplates-composites-for-boosting-electrochemical-detection-of-h2o2-released-from-cells
#16
Yingjun Sun, Mingchuan Luo, Xiangxi Meng, Jing Xiang, Lei Wang, Qiushi Ren, Shaojun Guo
Rational design and construction of electrocatalytic nanomaterials is vital for improving the sensitivity and selectivity of nonenzymatic electrochemical sensors. Here, we report a novel graphene supported intermetallic PtPb nanoplates (PtPb/G) nanocomposite as an enhanced electrochemical sensing platform for high-sensitivity detection of H2O2 in neutral solution and also released from the cells. The intermetallic PtPb nanoplates are first synthesized via a simple wet-chemistry process and subsequently assembled on graphene via a solution-phase self-assembly approach...
March 21, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28191931/laser-synthesis-and-processing-of-colloids-fundamentals-and-applications
#17
Dongshi Zhang, Bilal Gökce, Stephan Barcikowski
Driven by functionality and purity demand for applications of inorganic nanoparticle colloids in optics, biology, and energy, their surface chemistry has become a topic of intensive research interest. Consequently, ligand-free colloids are ideal reference materials for evaluating the effects of surface adsorbates from the initial state for application-oriented nanointegration purposes. After two decades of development, laser synthesis and processing of colloids (LSPC) has emerged as a convenient and scalable technique for the synthesis of ligand-free nanomaterials in sealed environments...
February 13, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/28186775/stability-limits-and-defect-dynamics-in-ag-nanoparticles-probed-by-bragg-coherent-diffractive-imaging
#18
Y Liu, P P Lopes, W Cha, R Harder, J Maser, E Maxey, M J Highland, N M Markovic, S O Hruszkewycz, G B Stephenson, H You, A Ulvestad
Dissolution is critical to nanomaterial stability, especially for partially dealloyed nanoparticle catalysts. Unfortunately, highly active catalysts are often not stable in their reactive environments, preventing widespread application. Thus, focusing on the structure-stability relationship at the nanoscale is crucial and will likely play an important role in meeting grand challenges. Recent advances in imaging capability have come from electron, X-ray, and other techniques but tend to be limited to specific sample environments and/or two-dimensional images...
March 8, 2017: Nano Letters
https://www.readbyqxmd.com/read/28183655/differential-cytotoxicity-and-internalization-of-graphene-family-nanomaterials-in-myocardial-cells
#19
Flavio F Contreras-Torres, Andrés Rodríguez-Galván, Carlos E Guerrero-Beltrán, Erick Martínez-Lorán, Eduardo Vázquez-Garza, Nancy Ornelas-Soto, Gerardo García-Rivas
Given the well-known physical properties of graphene oxide (GO), numerous applications for this novel nanomaterial have been recently envisioned to improve the performance of biomedical devices. However, the toxicological assessment of GO, which strongly depends on the used material and the studied cell line, is a fundamental task that needs to be performed prior to its use in biomedical applications. Therefore, the toxicological characterization of GO is still ongoing. This study contributes to this, aiming to synthesize and characterize GO particles and thus investigate their toxic effects in myocardial cells...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28168663/engineered-nanomaterials-their-physicochemical-characteristics-and-how-to-measure-them
#20
Rambabu Atluri, Keld Alstrup Jensen
Numerous types of engineered nanomaterials (ENMs) are commercially available and developments move towards producing more advanced nanomaterials with tailored properties. Such advanced nanomaterials may include chemically doped or modified derivatives with specific surface chemistries; also called higher generation or multiconstituent nanomaterials. To fully enjoy the benefits of nanomaterials, appropriate characterisation of ENMs is necessary for many aspects of their production, use, testing and reporting to regulatory bodies...
2017: Advances in Experimental Medicine and Biology
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