Mechanical response of silver/polyvinyl alcohol thin film: From one-step and cyclic nanoindentation

Jha, Minakshi; Shimpi, Navinchandra G.

doi:10.1016/j.aiepr.2021.11.001

Cited by 9 publications

(7 citation statements)

References 51 publications

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“…The XRD pattern of Ag-NPrs/Cu 2 O prepared with the Ag NPrs solution of a volume of 250 μL shows the additional characteristic peak at a 2θ value of 38.10°, which is assigned to the crystallographic plane of body-centered cubic Ag according to JCPDS card no. 04-0783 . The analysis of XRD patterns distinctly confirms the successful deposition of Ag NPrs on the surface of Cu 2 O microspheres.…”

Section: Resultsmentioning

confidence: 63%

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SERS-Active Silver Nanoprisms Deposited on Cuprous Oxide Microspheres for Detection of Nitrofurazone

Kumar

Wang

Kokulnathan

et al. 2023

ACS Appl. Nano Mater.

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The construction of noble-metal incorporated semiconductor hybrids for the detection of antibiotics has intrigued great interest among researchers in the field of surface-enhanced Raman spectroscopy (SERS). However, the production of SERS substrates to accomplish the effective enhancement of the Raman signal was a bottleneck to researchers for the past decades. This study investigates the SERS performance of anisotropic Ag nanoprisms (Ag NPrs) attached onto the surface of Cu2O microspheres for the trace-level antibiotic detection of nitrofurazone (NFZ). Physicochemical activities and surface morphologies of the prepared hybrids were meticulously examined using various analytical techniques. The eminent sharp tips and edges of Ag NPrs deposited on Cu2O microspheres endow enormous intensity enhancement of the Raman signal of NFZ in the innumerable hotspot regions through the synergistic utilization of electromagnetic enhancement and charge transfer enhancement. The proposed hybrid-based SERS substrate provides superior detection performance, including high sensitivity, high enhancement factor of 2.31 × 1011, ultra-low limit of detection of 5.80 × 10–13 M, superior spot-to-spot uniformity, and substrate-to-substrate reproducibility <8.31% for NFZ detection. Furthermore, the real-sample analysis performed on NFZ in local pond water shows satisfactory recovery values from 81 to 96%. The presented sensing characteristics demonstrate that the proposed Ag-NPrs/Cu2O-based SERS substrate possesses promising features for detecting NFZ in standard and real-sample applications.

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Section: Resultsmentioning

confidence: 63%

“…04-0783. 53 The analysis of XRD patterns SERS enhancement and high stability. Antibiotic NFZ was selected as a target analyte to examine the SERS activity of Ag-NPrs/Cu 2 O hybrids.…”

Section: Synthesis Of Cu 2 O Microspheresmentioning

confidence: 99%

SERS-Active Silver Nanoprisms Deposited on Cuprous Oxide Microspheres for Detection of Nitrofurazone

Kumar

Wang

Kokulnathan

et al. 2023

ACS Appl. Nano Mater.

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“…The reduction in thermal stability of PVA/AgNPs films in comparison to pure PVA is a result of plasticizing reactions between the PVA chains and glycerol which is used during the in situ chemical synthesis of AgNPs films. [20,37] The change in lnσ ac versus angular frequency for pure PVA and PVA with (2,4,6) % v/v AgNPs were depicted in Figure 7. It was discovered that lnσ ac increases with frequency due to an increase in charge carrier mobility inside the composite as well as an increase in the number of transit sites.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…AgNPs were in situ chemically prepared, and a large volume (5 mL) of flexible glycerol was included, which was expected to reduce their brittleness. [17,36,37] Additionally, increases PVA's elasticity by reducing its mechanical properties while keeping in mind how elastic electronics will be used. [42,43] And improve the elasticity of PVA which reduces its mechanical properties, keeping in view their application in elastic electronics.…”

Section: Resultsmentioning

confidence: 99%

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Effect of silver nanoparticles on structural, thermal, electrical, and mechanical properties of poly(vinyl alcohol) polymer nanocomposites

Kareem

Polu²,

Rasheed

et al. 2023

Polymer Composites

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This paper presents the in‐situ chemical synthesis of silver nanoparticles (AgNPs) with glycerol embedded in poly(vinyl alcohol) (PVA) to synthesize (PVA/AgNPs) polymer nanocomposites with different volume percentages of AgNPs (2, 4, and 6) %v/v. X‐ray diffractometer shows the (200) plane of AgNPs, which appeared at 44.82° in PVA/(2, 4, and 6) %v/v AgNPs films. However, the (111), (220), and (311) planes at 2θ (37.55°, 65.08°, and 77.45°) respectively appeared in PVA with 6%v/v AgNPs only. Fourier transform infrared spectroscopy spectrum of AgNPs shows a COC peak at 1273 cm−1 which is attributed to the stronger affinity of AgNPs on the COC bonds in the PVA matrix. The scanning electron microscope confirmed that all nanoparticles are open‐spherical or near‐spherical in shape. Differential scanning calorimetry shows the decrease in glass transition and melting temperature of pure PVA from 64.62° and 185.54° to 53.09° and 182.35° after the incorporation of AgNPs. Thermogravimetric analysis shows the reduction of thermal stability of PVA/AgNPs films when compared to pure PVA. The electrical conductivity of PVA/AgNPs films increased with the addition of AgNPs. From Mechanical studies, the values of Young's modulus, yield strength, and ultimate tensile strength decreased with increasing AgNPs volume percentage.

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Development of PVA/sodium alginate incorporated with histidine capped silver nanoparticles for food packaging application

Suganthi,

Vignesh,

Al‐Ansari

et al. 2024

Polymers for Advanced Techs

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Packaging is a growing field of interest, and the use of nanotechnology is accelerating its expansion. The study reports the fabrication of poly(vinyl alcohol) (PVA) blended sodium alginate (SA) and incorporated with different ratios of histidine‐capped silver (H‐AgNPs) nanoparticle films. Fabrication of PVA/SA/H‐AgNPs films was confirmed with the surface plasmon resonance (SPR) band denoted AgNPs presence between 400 and 420 nm measured by UV–Vis absorption spectroscopy. The characteristics of the polymeric biocomposite films were significantly altered by different ratios of AgNPs. The interaction of PVA/SA and PVA/SA with AgNPs was analyzed by using FT‐IR analysis. The degree of crystallinity was increased upon increasing the concentration of H‐AgNPs as confirmed by XRD measurements. The homogeneity of dispersion and surface morphology of samples were studied by FESEM. The addition of H‐AgNPs in the polymeric film increased the surface roughness of the polymeric film confirmed by AFM analysis. The contact angle of the PVA/SA blend matrix was observed to be 46.97°, and with the incorporation of AgNPs ranging from 3%, 5%, and 7% to the blend matrix, the contact angle of the nanocomposite films in increasing hydrophobic order was 60.53°, 83.57°, and 96.20°, respectively. The incorporation of AgNPs also demonstrates that the PVA/SA blend matrix has desirable thermal stability. The improved qualities were due to H bonding between PVA, SA, and H‐AgNPs, in which molecules contact strongly with one another. Furthermore, the PVA/SA/H‐AgNPs showed significant antibacterial activity against both Gram‐positive (G+) strains (Staphylococcus aureus) and Gram‐negative (G−) strains (Escherichia coli) bacterial infections. The findings of this research indicate that the PVA/SA/H‐AgNPs fabricated composite films considerable for applications in food packaging.

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Mechanical response of silver/polyvinyl alcohol thin film: From one-step and cyclic nanoindentation

Cited by 9 publications

References 51 publications

SERS-Active Silver Nanoprisms Deposited on Cuprous Oxide Microspheres for Detection of Nitrofurazone

SERS-Active Silver Nanoprisms Deposited on Cuprous Oxide Microspheres for Detection of Nitrofurazone

Effect of silver nanoparticles on structural, thermal, electrical, and mechanical properties of poly(vinyl alcohol) polymer nanocomposites

Development of PVA/sodium alginate incorporated with histidine capped silver nanoparticles for food packaging application

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