Improving Adhesion Between Nanoparticles and Surface of Mica Substrate by Aminosilane Modification

Yin, Yaoting; Xu, Hongmei; Wang, Ying; Liu, Ziyu; Zhang, Sheng; Weng, Zhankun; Song, Zhengxun; Wang, Zuobin

doi:10.1007/s11468-019-01030-8

Cited by 5 publications

(2 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Adhesive force between particles and substrates can be assessed qualitatively 65 or quantitatively. 66,67 However, for release measurements several additional factors besides simple adhesion should be taken into account, such as the flow fluids across the surfaces. Therefore, a more praxisrelated technique, as described below, was used in this work which simulated the in vivo conditions to qualitatively analyze the release properties.…”

Section: Releasing Tests Of Se Nps Immobilized On Spider Silk Proteinmentioning

confidence: 99%

<p>Enhanced Antibacterial Activity of Se Nanoparticles Upon Coating with Recombinant Spider Silk Protein eADF4(κ16)</p>

Huang¹,

Kumari²,

Herold³

et al. 2020

IJN

View full text Add to dashboard Cite

Purpose: Selenium nanoparticles (Se NPs) are promising antibacterial agents to tackle the growing problem of antimicrobial resistance. The aim of this study was to fabricate Se NPs with a net positive charge to enhance their antibacterial efficacy. Methods: Se NPs were coated with a positively charged proteinrecombinant spider silk protein eADF4(κ16)to give them a net positive surface charge. Their cytotoxicity and antibacterial activity were investigated, with negatively charged polyvinyl alcohol coated Se NPs as a control. Besides, these eADF4(κ16)-coated Se NPs were immobilized on the spider silk films, and the antibacterial activity of these films was investigated. Results: Compared to the negatively charged polyvinyl alcohol coated Se NPs, the positively charged eADF4(κ16)-coated Se NPs demonstrated a much higher bactericidal efficacy against the Gram-negative bacteria E. coli, with a minimum bactericidal concentration (MBC) approximately 50 times lower than that of negatively charged Se NPs. Cytotoxicity testing showed that the eADF4(κ16)-coated Se NPs are safe to both Balb/3T3 mouse embryo fibroblasts and HaCaT human skin keratinocytes up to 31 µg/mL, which is much higher than the MBC of these particles against E. coli (8 ± 1 µg/mL). In addition, antibacterial coatings were created by immobilising the eADF4(κ16)-coated Se NPs on positively charged spider silk films and these were shown to retain good bactericidal efficacy and overcome the issue of low particle stability in culture broth. It was found that these Se NPs needed to be released from the film surface in order to exert their antibacterial effects and this release can be regulated by the surface charge of the film, such as the change of the spider silk protein used. Conclusion: Overall, eADF4(κ16)-coated Se NPs are promising new antibacterial agents against life-threatening bacteria.

show abstract

Section: Releasing Tests Of Se Nps Immobilized On Spider Silk Proteinmentioning

confidence: 99%

<p>Enhanced Antibacterial Activity of Se Nanoparticles Upon Coating with Recombinant Spider Silk Protein eADF4(κ16)</p>

Huang¹,

Kumari²,

Herold³

et al. 2020

IJN

View full text Add to dashboard Cite

show abstract

“…However, poor interfacial binding between the mica nanosheets and resin matrixes is still one of the factors limiting the application of these materials. Chemical graft modification is a commonly used method, which can greatly improve the interfacial binding strength of composite materials and improve the mechanical properties of materials, , involving procedures such as silane coupling, , vinyl functionalization, ion exchange, and so on …”

Section: Introductionmentioning

confidence: 99%

Force-Induced Self-Assembly of Supramolecular Modified Mica Nanosheets for Ductile and Heat-Resistant Mica Papers

Jiang

Zhang

et al. 2021

Langmuir

View full text Add to dashboard Cite

Mica is a naturally abundant layered silicate mineral that has higher strength than other layered silicate minerals, but its inherent brittleness limits its application in some fields. In this work, mica was ultrasonically exfoliated into a single-layered nanomaterial after thermal activation, acidification, sodium replacement, and cetyltrimethylammonium bromide (CTAB) intercalation and then modified with ureido-pyrimidinone (UPy)-based PEG chains. Vacuum-assisted self-assembly was used to construct supramolecularly modified single-layered mica into bulk materials, in which the mica nanosheets were stacked into mica paper. The reversible quadruple hydrogen-bonded UPy moieties provided a high binding constant and significantly improved the strength and toughness of the obtained mica paper. These force-induced assembled mica papers showed significantly improved tensile strength and toughness compared with pure mica paper and simultaneously maintained the heat resistance of the mica materials, which may be good candidates for the substrates of flexible sensors working at higher temperatures.

show abstract

Material removal rate of double-faced mechanical polishing of 4H-SiC substrate

Zhang

Yang

Qiu

2021

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Silicon carbide (SiC) has been a promising the-third-generation semiconductor power device material for high-power, high-temperature, substrate applications. It aims to improve the material removal rate (MRR), on the premise of ensuring the surface roughness requirements of the double-faced mechanical polishing of 6-inch SiC substrate. To obtain the relationship between any point on SiC substrate and polishing pads, the model about double-faced mechanical polishing has been built and the kinematics equations were created. Best optimized material removal rate parameters were obtained. MRR reached the maximum when speed rate of the outside ring gear to the inside sun gear m=-1, speed rate of lower plate to the inside sun gear n=5, SiC substrate distribution radius RB=75. The primary and secondary order of MRR (n>m>RB) was obtained. An accurate mathematical model of orthogonal rotary regression test of Tri-factor quadratic of MRR was established and the regression model was significant. Surface quality of SiC substrate was observed and characterized with SEM and AFM. It greatly provides a key guarantee for the next process of CMP, confirmed the importance of MRR to ultra-smooth polishing, and provides a guarantee for its application in semiconductor equipment and technology.

show abstract

Improving Adhesion Between Nanoparticles and Surface of Mica Substrate by Aminosilane Modification

Cited by 5 publications

References 28 publications

<p>Enhanced Antibacterial Activity of Se Nanoparticles Upon Coating with Recombinant Spider Silk Protein eADF4(κ16)</p>

<p>Enhanced Antibacterial Activity of Se Nanoparticles Upon Coating with Recombinant Spider Silk Protein eADF4(κ16)</p>

Force-Induced Self-Assembly of Supramolecular Modified Mica Nanosheets for Ductile and Heat-Resistant Mica Papers

Material removal rate of double-faced mechanical polishing of 4H-SiC substrate

Contact Info

Product

Resources

About