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nanosilver, etc ; DNA; biomarkers; biosensors; disease surveillance; enzyme activity; fluorescence; hydrolysis; microRNA; Show all 9 Subjects
Abstract:
... The development of a biosensing platform with high sensitivity, high specificity, and low cost for the detection of biomarkers, especially one that is programmable and universal, is critical for disease surveillance and diagnosis, yet it remains a difficulty. Herein, we combined the clustered regularly interspaced short palindromic repeats (CRISPR)/Cas system with a fluorescent label-free biosenso ...
nanosilver, etc ; capacitance; carbon; carbon dioxide; cathodes; electrical conductivity; electrochemical capacitors; electrochemistry; energy density; microstructure; nanosheets; Show all 11 Subjects
Abstract:
... Layered double hydroxides are considered promising electrode materials for the preparation of high-energy–density supercapacitors owing to their suitable microstructure and significant electrochemical properties. In this study, honeycomb-like NiMn-layered double-hydroxide (NiMn-LDH) nanosheet arrays with numerous electron/ion channels, a large number of active sites, considerable redox reversibili ...
... A simple, ultra-sensitive, and super-stable hydrophobic SERS platform for detection of melamine in milk is developed. The hydrophobic SERS platform was constructed via directly growing hydrophobic carbon/silver nanoparticles on glass by in-situ one-step carbonization using hexadecylpyridinium chloride monohydrate as stabilizer and reducing agent. The performances of SERS platform are systematicall ...
nanosilver, etc ; aflatoxin B1; calibration; chemometrics; detection limit; food chemistry; food safety; human health; ochratoxin A; ochratoxin B; rice; Show all 11 Subjects
Abstract:
... Food safety is regarded as a crucial factor in both human health and economic progress. This study focuses on the fabrication of a label-free surface-enhanced Raman scattering (SERS) sensor for rapid sensing of three main mycotoxins (aflatoxin B1 (AFB1), ochratoxin A (OTA), ochratoxin B (OTB)) in rice using the optimized rough silver nanoparticles (AgNPs@K30) with enhancement factor (EF) 1.58 × 10 ...
nanosilver, etc ; DNA damage; Drosophila melanogaster; cell viability; dose response; eclosion; fat body; fecundity; genes; hemocytes; metallothionein; pupation; sequence analysis; toxicity; China; Show all 15 Subjects
Abstract:
... The widely use of silver nanoparticles (AgNPs) as antimicrobial agents gives rise to potential environmental risks. AgNPs exposure have been reported to cause toxicity in animals. Nevertheless, the known mechanisms of AgNPs toxicity are still limited. In this study, we systematically investigated the toxicity of AgNPs exposure using Drosophila melanogaster. We show here that AgNPs significantly de ...
... Nanotechnology has revealed profound possibilities for the applications in applied sciences. The nanotechnology works based on nanoparticles. Among nanoparticles, silver nanoparticles largely introduced into aquatic environments during fabrication. Which cause severe contamination in the environment specially in freshwater fish. Therefore, the current study was a pioneer attempt to use the animal ...
... Despite significant progress made in the past two decades, silver nanoparticles (AgNPs) have not yet made it to the clinical trials. In addition, they showed both positive and negative effects in their toxicity from unicellular organism to well-developed multi-organ system, for example, rat. Although it is generally accepted that capped (bio)molecules have synergistic bioactivities and diminish th ...
nanosilver, etc ; biochemistry; microbiology; nanoparticles; silver; Show all 5 Subjects
Abstract:
... This review contains the results of experimental studies of recent years dedicated to the resistance of bacteria to the action of nanosized silver and describes the putative molecular mechanisms of its development. Emphasis is placed on the study of works devoted to the investigation of the mechanisms of the resistance of bacteria to silver ions, which are the main factor of the bactericidal actio ...
nanosilver, etc ; dyes; filtration; photocatalysis; photolysis; Show all 5 Subjects
Abstract:
... Two-dimensional Ag/WS₂ hybrid membranes were developed to improve separation performance of WS₂ membrane by in situ self-reduction of AgNO₃ on WS₂ nanoflakes. With the increase of Ag content in Ag/WS₂ hybrid membrane, water flux increased as well because of increased interlayer spacing and more irregular stacking of WS₂ nanoflakes, while the rejection rates for dye molecules decreased. The hybrid ...
nanosilver, etc ; photocatalysis; photocatalysts; photoreduction; uranium; Show all 5 Subjects
Abstract:
... Photocatalytic reduction of soluble hexavalent uranium (U(VI)) is a novel and efficient avenue to enriching U(VI), where the free U(VI) is firstly bound on the surface of photocatalysts and then reduced to insoluble tetravalent uranium (U(IV)) by photoelectrons. Therefore, constructing the efficient U(VI) binding sites on photocatalysts is an efficient strategy to boost catalytic activity toward U ...
nanosilver, etc ; borax; catechol; dopamine; polymerization; Show all 5 Subjects
Abstract:
... Polydopamine (PDA) nanoparticles and PDA-coated surfaces have wide applications due to PDA’s unique reactivity and efficient coating ability on nearly any surface. However, challenges in manipulating and controlling dopamine polymerization and thus the PDA nanoparticle formations and surface coatings still exist. Here, dopamine with a tetraborate (borax)-protected catechol group was utilized to tu ...
nanosilver, etc ; bioaccumulation; rice; risk; silver; toxicity; Show all 6 Subjects
Abstract:
... The biological toxicity and eco-environmental risk of metal nanoparticles (MNPs) is closely related to their stability. The stability of MNPs not only depends on their own properties but also on the effects of biological and environmental factors. To better understand the interaction between biological factors and MNPs in aquatic environments, the effects of total rice root exudates (T-RRE) on the ...
nanosilver, etc ; environmental exposure; environmental science; rivers; Show all 4 Subjects
Abstract:
... Due to the complexity of the environmental matrix and the limitation of the detection level, it is important to use models to evaluate environmental exposure to nanomaterials. Based on this, this research established two multi-media fate and transport models of silver nanoparticles (AgNPs) with respective coarse and fine spatial resolutions. Using the case of the spatial distribution of AgNPs in t ...
nanosilver, etc ; ambient temperature; relative humidity; transistors; Show all 4 Subjects
Abstract:
... Despite the critical need to monitor H₂S, a hazardous gas, in environmental and medical settings, there are currently no reliable methods for rapid and sufficiently discriminative H₂S detection in real-world humid environments. Herein, targeted hybridizing of Ti₃C₂Tₓ MXene with Ag nanoparticles on a field-effect transistor (FET) platform has led to a step change in MXene sensing performance down t ...
nanosilver, etc ; crystallization; energy; humans; luminescence; nanofibers; Show all 6 Subjects
Abstract:
... Wearable skin-inspired electronic skins present remarkable outgrowth in recent years because their promising comfort device integration, lightweight, and mechanically robust durable characteristics led to significant progresses in wearable sensors and optoelectronics. Wearable electronic devices demand real-time applicability and factors such as complex fabrication steps, manufacturing cost, and r ...
nanosilver, etc ; durability; humans; insulating materials; nanofibers; Show all 5 Subjects
Abstract:
... Flexible pressure sensors have received tremendous attention for various wearable applications. However, it remains a critical challenge to develop a flexible pressure sensor with excellent sensitivity performances and multiple advantageous properties. Herein, a high-performance flexible piezoresistive pressure sensor PMIA@PDA@Ag was developed, which sensitive component is consisted of Ag nanopart ...
nanosilver, etc ; absorption; electron transfer; surface plasmon resonance; Show all 4 Subjects
Abstract:
... The localized surface plasmon resonance (LSPR) from noble metal nanomaterials (NMs) is a promising solution to approach the theoretical efficiency for photovoltaic devices. However, the plasmon resonance of metal NMs with particular shapes and sizes can only be excited within narrow spectral ranges, which can hardly cover the broad-band solar spectrum. To address this issue, in this article, Ag NM ...
nanosilver, etc ; biomarkers; early diagnosis; hepatoma; magnetic fields; Show all 5 Subjects
Abstract:
... As an important marker of Hepatocellular carcinoma (HCC), AFP-L3 has attracted attention. In this study, the surface-plasmon-assisted Ag nanoparticles symmetrical growth technology under magnetic field is used to fabricate the six-nanohole nanojar array containing Ag nanoparticles as the sensing substrate. The displacement of SERS signal of the optimized structure is used to detect HCC marker AFP- ...
nanosilver, etc ; analytical chemistry; atomic absorption spectrometry; spectrometers; Show all 4 Subjects
Abstract:
... Specific features of the choice of conditions for determining the sizes of silver nanoparticles in aqueous dispersions by single particle inductively coupled plasma mass spectrometry (SP-ICP-MS) are discussed. It is shown that the limiting factors for determining the sizes of analyte nanoparticles are the degree of sample dilution and the dwell time under optimized operating conditions of the mass ...
nanosilver, etc ; antimicrobial properties; silver; surface area; thermodynamics; Show all 5 Subjects
Abstract:
... Nanosilver (AgNP) has a large surface area that contributes to enhanced interactions with bacteria, as well as silver ion release. The actual AgNP antimicrobial effect is determined by the AgNP size. AgNPs with smaller diameters showed better antimicrobial effects because smaller AgNPs had larger surface areas, which led to greater silver ion release and stronger attachment to bacteria. The attach ...