TRACE LEVEL DETECTION OF EXPLOSIVES AND PESTICIDES USING ROBUST, LOW-COST, FREE-STANDING SILVER NANOPARTICLES DECORATED POROUS SILICON

Zinc-ion batteries (ZIBs) have attracted significant attention owing to their high safety, high energy density, and low cost. ZIBs have been studied as a potential energy device for portable and...

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Robust immobilization of anionic silver nanoparticles on cellulose filter paper toward a low-cost point-of-use water disinfection system with improved anti-biofouling properties

RSC Advances ◽

10.1039/d0ra09152a ◽

2021 ◽

Vol 11 (9) ◽

pp. 4873-4882

Author(s):

Gongyan Liu ◽

Ruiquan Yu ◽

Jing Jiang ◽

Zhuang Ding ◽

Jing Ma ◽

...

Keyword(s):

Silver Nanoparticles ◽

Filter Paper ◽

Low Cost ◽

Water Disinfection ◽

Point Of Use ◽

Cellulose Filter

Point-of-use water disinfection by GA@AgNPs-LA-FP.

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Characterization of Silver Nanoparticles on Porous silicon by Laser ablation in Liquid

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/1126/1/012006 ◽

2021 ◽

Vol 1126 (1) ◽

pp. 012006

Author(s):

Mohammed Ibrahim Ismael ◽

Ghazwan Ghazi Ali ◽

Uday Muhsin Nayef

Keyword(s):

Silver Nanoparticles ◽

Laser Ablation ◽

Porous Silicon ◽

Laser Ablation In Liquid

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Size-controlled fabrication of silver nanoparticles using the Hedyotis puberula leaf extract: toxicity on mosquito vectors and impact on biological control agents

RSC Advances ◽

10.1039/c6ra23208f ◽

2016 ◽

Vol 6 (99) ◽

pp. 96573-96583 ◽

Cited By ~ 7

Author(s):

Raja Mohamed Sait Thameem Azarudeen ◽

Marimuthu Govindarajan ◽

Abubucker Amsath ◽

Shine Kadaikunnan ◽

Naiyf S. Alharbi ◽

...

Keyword(s):

Biological Control ◽

Silver Nanoparticles ◽

Leaf Extract ◽

Low Cost ◽

Aquatic Organisms ◽

Capping Agent ◽

Mosquito Vectors ◽

Biological Control Agents ◽

Size Controlled ◽

Control Tool

As a low-cost and eco-friendly control tool, Ag nanoparticles were fabricated usingHedyotis puberulaaqueous extract as a reducing and capping agent and showed potent activity against malaria and arbovirus vectors with low biotoxicity against non-target aquatic organisms.

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Fabrication of Porous Silicon Based Humidity Sensing Elements on Paper

Journal of Sensors ◽

10.1155/2015/927396 ◽

2015 ◽

Vol 2015 ◽

pp. 1-10 ◽

Cited By ~ 12

Author(s):

Tero Jalkanen ◽

Anni Määttänen ◽

Ermei Mäkilä ◽

Jaani Tuura ◽

Martti Kaasalainen ◽

...

Keyword(s):

Porous Silicon ◽

Smart Cities ◽

Low Cost ◽

Electrical Characterization ◽

Fabrication Process ◽

Sensing Element ◽

Paper Substrate ◽

Roll To Roll ◽

Silver Electrodes ◽

Silicon Based

A roll-to-roll compatible fabrication process of porous silicon (pSi) based sensing elements for a real-time humidity monitoring is described. The sensing elements, consisting of printed interdigitated silver electrodes and a spray-coated pSi layer, were fabricated on a coated paper substrate by a two-step process. Capacitive and resistive responses of the sensing elements were examined under different concentrations of humidity. More than a three orders of magnitude reproducible decrease in resistance was measured when the relative humidity (RH) was increased from 0% to 90%. A relatively fast recovery without the need of any refreshing methods was observed with a change in RH. Humidity background signal and hysteresis arising from the paper substrate were dependent on the thickness of sensing pSi layer. Hysteresis in most optimal sensing element setup (a thick pSi layer) was still noticeable but not detrimental for the sensing. In addition to electrical characterization of sensing elements, thermal degradation and moisture adsorption properties of the paper substrate were examined in connection to the fabrication process of the silver electrodes and the moisture sensitivity of the paper. The results pave the way towards the development of low-cost humidity sensors which could be utilized, for example, in smart packaging applications or in smart cities to monitor the environment.

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Insights into MWCNTs/polyimide nanocomposites: from synthesis to application as free-standing flexible electrodes in low-cost micro-supercapacitors

Materials Today Chemistry ◽

10.1016/j.mtchem.2021.100671 ◽

2022 ◽

Vol 23 ◽

pp. 100671

Author(s):

I. Butnaru ◽

A.-P. Chiriac ◽

C.-P. Constantin ◽

M.-D. Damaceanu

Keyword(s):

Low Cost ◽

Free Standing ◽

Flexible Electrodes

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Immobilization of Silver Nanoparticles on Chitosan-Coated Silica-Gel-Beads and the Antibacterial Activity

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.892.36 ◽

2021 ◽

Vol 892 ◽

pp. 36-42

Author(s):

Muhammad Iqbal Hidayat ◽

Muhammad Adlim ◽

Ilham Maulana ◽

Muhammad Zulfajri

Keyword(s):

Silver Nanoparticles ◽

Silica Gel ◽

Low Cost ◽

Antibacterial Properties ◽

Chitosan Film ◽

Silver Ions ◽

Filter Material ◽

Silver Ion ◽

Gel Beads ◽

Metal Colloid

Silver nanoparticles (Ag0) have attracted the most attention due to their broad antimicrobial application and outstanding activity. The silver nanoparticles are usually in colloidal form, then immobilization the colloid onto solid support is still interesting to explore. In this work, a new method for silver colloidal nanoparticle immobilization on silica gel beads (SiG), which was then symbolized as Ag0-[chi-SiG] was conducted and characterized successfully. The finding proved that SiG must be coated with three chitosan film layers to give stable support for silver nanoparticles. This coating method caused the chitosan completely covered SiG, and the chitosan film provides coordination bonding for silver ions. The most appropriate solvent for silver ion impregnation on the surface of chi-SiG is methanol compared to other solvents. Tungsten lamp as the photo-irradiation, which is low cost and environmentally friendly has been proven effective for silver ion reduction, as shown by silver metal colloid UV-Vis surface plasmon resonance at 400-700 nm. Ag0-[chi-SiG] showed the antibacterial properties of inhibiting the growth Staphylococcus aureus and Escherichia coli; then it provides the potential application for antibacterial filter material. According to the weight comparison between antibacterial standard and Ag content, then Ag0-[chi-SiG] has two and five times higher of exhibiting zone for each bacteria.

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Strongly Superlinear Light Emission and Large Induced Absorption in Oxidized Porous Silicon Films

MRS Proceedings ◽

10.1557/proc-536-9 ◽

1998 ◽

Vol 536 ◽

Cited By ~ 3

Author(s):

H. Koyama ◽

P. M. Fauchet

Keyword(s):

Porous Silicon ◽

Thermal Effects ◽

Light Emission ◽

Laser Intensity ◽

Excitation Intensity ◽

Silicon Films ◽

Free Standing ◽

Induced Absorption ◽

Cw Laser ◽

Oxidized Porous Silicon

AbstractThe optical properties of oxidized free-standing porous silicon films excited by a cw laser have been investigated. It is found that samples oxidized at 800–950 °C show a strongly superlinear light emission at an excitation intensity of ∼10 W/cm2. This emission has a peak at 900–1100 nm and shows a blueshift as the oxidation temperature is increased. These samples also show a very large induced absorption, where the transmittance is found to decrease reversibly by ≤99.7 %.The induced absorption increases linearly with increasing pump laser intensity. Both the superlinear emission and the large induced absorption are quenched when the samples are attached to materials with a higher thermal conductivity, suggesting that laser-induced thermal effects are responsible for these phenomena.

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