U.S. flag

An official website of the United States government

PubAg

Main content area

You searched for: Subject "nanosilver" Remove constraint Subject: "nanosilver"
Start Over

Search

11,245  Search Results

« Previous | 1 - 20 of 11,245 |
Number of results to display per page

Search Results

1. Measurement of mercury with highly selective fluorescent chemoprobe by carbon dots and silver nanoparticles

Author:
Zhou, Qingxiang; Yongli Liu,; Wu, Yalin; Li, Zhi; Li, Yanhui; Liu, Menghua; Qu, Tongxu; Chen, Chunmao
Source:
Chemosphere 2021 v.274 pp. 129959
ISSN:
0045-6535
Subject:
nanosilver,   etc   ; fluorescence; mercury;     Show all 3 Subjects
Abstract:
... This work describes a novel fluorescent chemoprobe that uses carbon dots and silver nanoparticles (AgNPs) to monitor mercury ions in aqueous samples attributed to the principle of inner filter effect. The fluorescent response signal of the carbon dots is diminished by AgNPs, attributed to inner filter effect, and is restored with the addition of Hg²⁺. The fluorescent chemoprobe was specific over t ...
DOI:
10.1016/j.chemosphere.2021.129959

2. Selective Single Molecule SERRS of Cationic and Anionic Dyes by Cl– and Mg²⁺ Adions: An Old New Idea

Author:
Stefancu, Andrei; Iancu, Stefania D.; Leopold, Nicolae
Source:
Journal of physical chemistry 2021 v.125 no.23 pp. 12802-12810
ISSN:
1932-7455
Subject:
nanosilver,   etc   ; adsorption; rhodamines;     Show all 3 Subjects
Abstract:
... We show in this study the selective single molecule surface-enhanced resonance Raman scattering (SM-SERRS) detection of cationic Rhodamine 6G (R6G) and anionic Rose Bengal (RB) dyes on colloidal silver nanoparticles (AgNPs), promoted by Cl– and Mg²⁺ adsorbed ions (adions), respectively. From a mixture of R6G and RB, we detected the SM-SERRS spectrum of R6G on AgNPs@Cl–, whereas on AgNPs@Mg²⁺ we ob ...
DOI:
10.1021/acs.jpcc.1c03155

3. Highly Sensitive and Durable Sea-Urchin-Shaped Silver Nanoparticles Strain Sensors for Human-Activity Monitoring

Author:
Zou, Qiushun; He, Kai; Ou-Yang, Jian; Zhang, Yueli; Shen, Yang; Jin, Chongjun
Source:
ACS applied materials & interfaces 2021 v.13 no.12 pp. 14479-14488
ISSN:
1944-8252
Subject:
nanosilver,   etc   ; deformation; evolution; humans;     Show all 4 Subjects
Abstract:
... High-performance strain sensors, composed of various artificial sensing materials on/in stretchable substrates, show great promise for applications in flexible electronic devices. Here, we demonstrated a highly sensitive and durable strain sensor consisting of a ribbon of close-packed sea-urchin-shaped silver nanoparticles (SUSNs) sandwiched between two layers of poly(dimethylsiloxane) (PDMS). Eac ...
DOI:
10.1021/acsami.0c22756

4. Sensitive detection of RNA based on concatenated self-fuelled strand displacement amplification and hairpin-AgNCs

Author:
Guo, Yahui; Wang, Mofan; Shen, Fumiao; Hu, Zhigang; Ding, Hongliu; Yao, Weirong; Qian, He
Source:
Analytical methods 2021 v.13 no.4 pp. 447-452
ISSN:
1759-9679
Subject:
nanosilver,   etc   ; fluorescence; microRNA;     Show all 3 Subjects
Abstract:
... Herein, a self-fuelled amplification strategy (SFAS) is proposed, in which two strand displacement amplification (SDA) processes were concatenated for the proliferation of ssDNA. The ssDNA then initiated a polymerase action and caused the destruction of hairpin-templated silver nanoclusters (AgNCs), resulting in decreased fluorescence for sensing miRNA-21. This SFAS-based sensor is less complicate ...
DOI:
10.1039/d0ay01762k

5. Simultaneous Photomultiplication Improvement and Response Acceleration for High-Performance Lateral Polymer Photodetectors Based on Bulk Heterojunction

Author:
Shou, Meihua; Zhang, Qinglei; Xiong, Shicheng; Han, Tao; Zhou, Jiadong; Zheng, Nan; Xie, Zengqi; Liu, Linlin
Source:
ACS applied materials & interfaces 2021 v.13 no.4 pp. 5293-5301
ISSN:
1944-8252
Subject:
nanosilver,   etc   ; electrodes; polymers;     Show all 3 Subjects
Abstract:
... In organic photodetectors, photomultiplication is mainly originated from interfacial and/or bulk charge traps, which induces slow response due to the slow release of trapped charges and strongly limits the optimization of the overall performance. This study has exhibited a remarkable case that the gain (>1) and response speed of the lateral photodetectors are promoted simultaneously and effectivel ...
DOI:
10.1021/acsami.0c18581

6. Synthesis of silver nanoparticles, influence of capping agents, and dependence on size and shape: A review

Author:
Restrepo, Cindy Vanessa; Villa, Cristian C.
Source:
Environmental nanotechnology, monitoring & management 2021 v.15 pp. 100428
ISSN:
2215-1532
Subject:
nanosilver,   etc   ; administrative management; particle size;     Show all 3 Subjects
Abstract:
... Silver nanoparticles have demonstrated a wide range of applications derived from shape and size control which is a crucial factor to improve antimicrobial, physical, and chemical properties. The use of different capping agents not only can control the material’s particle size, agglomeration, and morphology but also stability over time of nanostructures. Furthermore, the type of interaction of the ...
DOI:
10.1016/j.enmm.2021.100428

7. Silver Nanoparticles in Soil: Input, Transformation, and Toxicity

Author:
Kulikova, N. A.
Source:
Eurasian soil science 2021 v.54 no.3 pp. 352-365
ISSN:
1064-2293
Subject:
nanosilver,   etc   ; risk; soil; toxicity; toxicology;     Show all 5 Subjects
Abstract:
... The review briefs and analyzes the quantitative data on the input and content of silver nanoparticles (AgNPs) in soil, their possible transformations, and toxicity. The currently available data on the AgNPs content in soil are exclusively based on simulation results and vary in a wide range from 5.33 × 10–⁶ to 7.4 µg/kg at an annual input rate of 1.2 × 10–³ to 9.68 µg/kg. The main variants of AgNP ...
DOI:
10.1134/S1064229321030091

8. Comparative analysis of upward and downward vertical flow constructed wetlands on the nitrogen removal and functional microbes treating wastewater containing Ag nanoparticles

Author:
Cao, Chong; Huang, Juan; Yan, Chun-ni; Ma, Yi-xuan; Xiao, Jun; Zhang, Xin-xin
Source:
Journal of environmental management 2021 v.278 pp. 111573
ISSN:
0301-4797
Subject:
nanosilver,   etc   ; bacterial communities; nitrogen; wastewater;     Show all 4 Subjects
Abstract:
... This study investigated impacts of silver nanoparticles (AgNPs) on nitrogen removal within constructed wetlands (CWs) with different flow directions. The obtained results showed that addition of AgNPs at 0.5 and 2 mg/L significantly inhibited NH₄⁺-N removal, resulting from lower abundances of functional genes (amoA and nxrA) within CWs. And higher abundances of amoA and nxrA genes at 0.5 mg/L were ...
DOI:
10.1016/j.jenvman.2020.111573

9. New insights into the enhanced transport of uncoated and polyvinylpyrrolidone-coated silver nanoparticles in saturated porous media by dissolved black carbons

Author:
Wang, Kunkun; Zhang, Yinqing; Sun, Binbin; Yang, Yi; Xiao, Bowen; Zhu, Lingyan
Source:
Chemosphere 2021 v.283 pp. 131159
ISSN:
0045-6535
Subject:
nanosilver,   etc   ; carbon; energy; hydrophobicity; quartz; sand; soil;     Show all 7 Subjects
Abstract:
... Silver nanoparticles (AgNPs) are among the most applied nanomaterials and have great potential to be present in the environment. Dissolved black carbon (DBC) is ubiquitous in soil as a result of large-scale application of biomass-derived black carbon as soil amendments, while its impacts on the transport of AgNPs remain unclear. In this study, two DBCs with different functional groups were prepare ...
DOI:
10.1016/j.chemosphere.2021.131159

10. Controllable ionic self-assembl of polyoxometalate and melamine for synthesis of nanostructured Ag

Author:
Li, Hong; Xiong, Zhuzhu; Shi, Xiaodan; Gao, Fan; Peng, Haonan; Jia, Yi
Source:
Colloids and surfaces 2021 v.623 pp. 126732
ISSN:
0927-7757
Subject:
nanosilver,   etc   ; melamine; phosphotungstic acid; photoreduction; silver; temperature;     Show all 6 Subjects
Abstract:
... Keggin-type phosphotungstic acid and triazine melamine spontaneously self-assemble into hybrid nanostructures in aqueous media, which can act as an excellent template for the synthesis of nanostructured silver. The difference in initial conditions, such as the concentration, the ratio of the two components, and the temperature, exerts significant influence on the sizes and shapes of the hybrid nan ...
DOI:
10.1016/j.colsurfa.2021.126732

11. Atomic-engineering Au-Ag nanoalloys for screening antimicrobial agents with low toxicity towards mammalian cells

Author:
Lin, Zi; Luo, Yao; Liu, Pengfei; Li, Yanjun; Yue, Jun; Jiang, Lelun
Source:
Colloids and surfaces 2021 v.204 pp. 111831
ISSN:
0927-7765
Subject:
nanosilver,   etc   ; alloy nanoparticles; antibacterial properties; cytotoxicity; mammals;     Show all 5 Subjects
Abstract:
... Silver nanoparticles (AgNPs) have shown potent antibacterial activity against numerous bacteria strains. However, their toxicity against mammalian cells is still a big challenge, limiting their in vivo applications. Here, we found that alloying Ag and Au in an atomic level to form Au-Ag nanoalloys (NAs) could effectively reduce the cytotoxicity of AgNPs, and the antimicrobial activity of NAs could ...
DOI:
10.1016/j.colsurfb.2021.111831

12. Biogenic synthesis of gold and silver nanoparticles used in environmental applications: A review

Author:
Heinemann, Mônika G.; Rosa, Clarissa H.; Rosa, Gilber R.; Dias, Daiane
Source:
Trends in environmental analytical chemistry 2021 v.30 pp. e00129
ISSN:
2214-1588
Subject:
nanosilver,   etc   ; analytical chemistry; gold; nanogold; polyphenols; polysaccharides;     Show all 6 Subjects
Abstract:
... Due to their physical, chemical, optical, and mechanical properties, metallic nanoparticles (MNPs) are increasingly being used, with an emphasis on silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs). In recent years, green synthesis has gained prominence for exploring the use of naturally available biological sources for the obtention of metallic nanoparticles. Among these, algae and plan ...
DOI:
10.1016/j.teac.2021.e00129

13. Electrochemical Collision of Single Silver Nanoparticles in Carbon Nanopipettes

Author:
Liu, Rujia; Shen, Xiaoyue; Wang, Dengchao
Source:
Analytical chemistry 2021 v.93 no.20 pp. 7394-7398
ISSN:
1520-6882
Subject:
nanosilver,   etc   ; analytical chemistry; carbon; electrochemistry; oxidation;     Show all 5 Subjects
Abstract:
... Exploring the electrochemical collision features at nanoelectrodes is highly desirable for revealing new physical insights and further expanding its applications at smaller spaces. Herein, we study the collision processes of single silver nanoparticles (AgNPs) inside carbon nanopipettes (CNPs). Results show that AgNPs undergo multiple collision and oxidation processes prior to fully oxidation afte ...
DOI:
10.1021/acs.analchem.1c01382

14. Strain sensing metacomposites of polyaniline/silver nanoparticles/carbon foam

Author:
Shi, Yunan; Pan, Kaichao; Gerard Moloney, Mark; Qiu, Jun
Source:
Composites 2021 v.144 pp. 106351
ISSN:
1359-835X
Subject:
nanosilver,   etc   ; carbon; deformation; foams; permeability; polyaniline;     Show all 6 Subjects
Abstract:
... Metacomposites have received extensive attention due to their unique electromagnetic properties and excellent structural designability. Although altering composition content is a mature way to change electromagnetic performance, some inherent defects (e.g.: fixed and narrow application frequency, poor environmental adaptability, etc.) caused by this passive adjustment method indeed restrict their ...
DOI:
10.1016/j.compositesa.2021.106351

15. Large and Versatile Plasmonic Enhancement of Photoluminescence Using Colloidal Metallic Nanocubes

Author:
Khaywah, Mohammad; Potdevin, Audrey; Réveret, François; Mahiou, Rachid; Ouerdane, Youcef; Désert, Anthony; Parola, Stéphane; Chadeyron, Geneviève; Centeno, Emmanuel; Smaali, Rafik; Moreau, Antoine
Source:
Journal of physical chemistry 2021 v.125 no.14 pp. 7780-7790
ISSN:
1932-7455
Subject:
nanosilver,   etc   ; fluorescence; photoluminescence; physical chemistry; quartz; silver;     Show all 6 Subjects
Abstract:
... Improving phosphor photoluminescence efficiency is a key parameter to boost the performances of many optical devices. In this work, colloidal silver nanocubes, homogeneously spread on a luminescent surface, have proved to help both injecting and extracting light in and out of the photoluminescent layer and hence contributed significantly to the enhancement of the fluorescence. This approach has be ...
DOI:
10.1021/acs.jpcc.1c01140

16. Direct Single-Step Printing of Conductive Grids on Curved Surfaces Using Template-Guided Foaming

Author:
Bae, Juyeol; Chae, Youngchul; Park, Jun Gyu; Wu, Ronghui; Ju, Janghyun; Kim, Taesung
Source:
ACS applied materials & interfaces 2021 v.13 no.16 pp. 19168-19175
ISSN:
1944-8252
Subject:
nanosilver,   etc   ; electrical conductivity; evaporation; foams; liquids; silver;     Show all 6 Subjects
Abstract:
... Advanced transparent conductors have been studied intensively in the aspects of materials, structures, and printing methods. The material and structural advancements have been successfully accomplished with various conductive nanomaterials and spring-like structures for better electrical conductivity and high mechanical flexibility of the transparent conductors. However, the capability to print su ...
DOI:
10.1021/acsami.0c20477

17. Dielectric Engineering of Hot-Carrier Generation by Quantized Plasmons in Embedded Silver Nanoparticles

Author:
Román Castellanos, Lara; Hess, Ortwin; Lischner, Johannes
Source:
Journal of physical chemistry 2021 v.125 no.5 pp. 3081-3087
ISSN:
1932-7455
Subject:
nanosilver,   etc   ; energy; photocatalysis; physical chemistry; silver;     Show all 5 Subjects
Abstract:
... Understanding and controlling properties of plasmon-induced hot carriers is a key step toward next-generation photovoltaic and photocatalytic devices. Here, we uncover a route to engineering hot-carrier generation rates of silver nanoparticles by designed embedding in dielectric host materials. Extending our recently established quantum-mechanical approach to describe the decay of quantized plasmo ...
DOI:
10.1021/acs.jpcc.0c07617

18. Radiative Decay Rate Enhancement and Quenching for Multiple Emitters near a Metal Nanoparticle Surface

Author:
Zhou, Yadong; Chen, Gang; Zou, Shengli
Source:
Journal of physical chemistry 2021 v.125 no.4 pp. 2531-2536
ISSN:
1932-7455
Subject:
nanosilver,   etc   ; fluorescence; models; physical chemistry; wavelengths;     Show all 5 Subjects
Abstract:
... When molecules (emitters) are placed near a metal surface, their Raman scattering will be significantly enhanced, and their fluorescence signal might be enhanced or quenched. Both these two phenomena are closely related to the enhancement of the radiative decay rate (RDR) of the molecules upon the presence of a nearby metal nanoparticle. Using a recently developed model, we found that the RDR enha ...
DOI:
10.1021/acs.jpcc.0c10402

19. Photo-Induced Charge Transfer Enhancement for SERS in a SiO₂–Ag–Reduced Graphene Oxide System

Author:
Guo, Shuang; Jin, Sila; Park, Eungyeong; Chen, Lei; Mao, Zhu; Jung, Young Mee
Source:
ACS applied materials & interfaces 2021 v.13 no.4 pp. 5699-5705
ISSN:
1944-8252
Subject:
nanosilver,   etc   ; crystal structure; energy; graphene oxide;     Show all 4 Subjects
Abstract:
... Understanding and controlling the disorder in materials, especially the disorder caused by structural composition and doping effects, are important keys to studying the optical characteristics of materials. In this study, a SiO₂–Ag–reduced graphene oxide (rGO) composite structure was prepared by a simple wet chemical method, in which Ag nanoparticles (NPs) and SiO₂ were decorated onto the surface ...
DOI:
10.1021/acsami.0c17056

20. An Ultrasensitive Gateless Photodetector Based on the 2D Bilayer MoS₂–1D Si Nanowire–0D Ag Nanoparticle Hybrid Structure

Author:
Mao, Ching-Han; Dubey, Abhishek; Lee, Fang-Jing; Chen, Chun-Yen; Tang, Shin-Yi; Ranjan, Ashok; Lu, Ming-Yen; Chueh, Yu-Lun; Gwo, Shangjr; Yen, Ta-Jen
Source:
ACS applied materials & interfaces 2021 v.13 no.3 pp. 4126-4132
ISSN:
1944-8252
Subject:
nanosilver,   etc   ; molybdenum disulfide; nanowires; photoluminescence; silicon; wavelengths;     Show all 6 Subjects
Abstract:
... Atomically thin transition metal dichalcogenides (TMDC) have received much attention due to their wide variety of optical and electronic properties. Among various TMDC materials, molybdenum disulfide (MoS₂) has been intensely studied owing to its potential applications in nanoelectronics and optoelectronics. However, two-dimensional MoS₂ photodetectors suffer from low responsivity due to low optic ...
DOI:
10.1021/acsami.0c15819