Influence of the incorporation of metals on the optical properties of MCM-41

Hsieh, Ya‐Ping; Chen, Jiwei; Liang, Chi‐Te; Chen, Yang‐Fang; Wang, Aiqin; Mou, Chung‐Yuan

doi:10.1016/j.jlumin.2007.10.009

Cited by 7 publications

(2 citation statements)

References 35 publications

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“…Recently, room-temperature-synthesized silica-based sol-gels, termed silica xerogels (SX), have been studied as bioactive materials, and it was also reported that these xerogels were biocompatible both in vitro and in vivo [4][5][6]. In the past few years, a family of nano mesoporous materials with a high specific surface area and high porosity has received much interest because of their potential applications in catalysts, optical devices, etc [7,8]. In biomaterials research, mesoporous materials have been mainly investigated for use in drug delivery [9].…”

Section: Introductionmentioning

confidence: 99%

Chemical characteristics and hemostatic performances of ordered mesoporous calcium-doped silica xerogels

Wei²,

Lu³

et al. 2010

Biomed. Mater.

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A well-ordered mesoporous silicon dioxide calcium-doped xerogel (m-SXC) was synthesized by a sol–gel process. The in vitro bioactivity of the m-SXC was investigated by analyzing the apatite-forming ability in simulated body fluid (SBF) and MC3T3-E1 cell culture with materials, and the hemostatic activity of the m-SXC was determined by measuring the activated partial thromboplastin time (APTT) and prothrombin time (PT) in vitro. The results suggested that the m-SXC exhibited excellent in vitro bioactivity, with surface apatite formation for them-SXC containing 10 w% Ca (m-SXC10) exceeding that containing 5 w% Ca (n-SXC5) and 0% Ca (m-SXC0) at 7 days, and the cell response test (MTT assay) and cell morphology observation demonstrated that these materials were biocompatible with no obvious negative effects on cellular viability. Moreover, the m-SXC with a high surface area (m-SXC0: 489.9 m(2) g(-1), m-SXC5: 466.5 m2 g(-1), m-SXC10: 438.1 m(2) g(-1)) possessed good hemostatic property because it could absorb a large amount of water from the blood, which could concentrate the components of blood and reduce the clotting time. Furthermore, the addition of calcium in the m-SXC had significant effects on the clotting time, in which the APTT(m-SXC0: 8 s, m-SXC5: 7 s, m-SXC10: 6 s, respectively) and PT (m-SXC0: 16 s, m-SXC5:11 s, m-SXC10: 10 s, respectively) were shortened with the increase of Ca amounts in them-SXC, indicating that incorporation of Ca in the m-SXC could improve its hemostatic activity.

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Section: Introductionmentioning

confidence: 99%

Chemical characteristics and hemostatic performances of ordered mesoporous calcium-doped silica xerogels

Wei²,

Lu³

et al. 2010

Biomed. Mater.

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“…Thus, we hypothesize that silica xerogels containing Cu 2+ can be used as dressings to aid skin healing. Over the past few years, a family of mesoporous materials with a high specific surface area has received much interest because of its potential applications in catalysts, optical devices, etc [6,7]. In this study, a novel biomaterial of mesoporous silica xerogels containing Cu ions was developed for potential uses in wound-healing applications.…”

Section: Introductionmentioning

confidence: 99%

Antibacterial properties of mesoporous copper-doped silica xerogels

Liang

Liu

et al. 2009

Biomed. Mater.

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Mesoporous copper-doped silica xerogels (m-SXCu) with antibacterial properties were synthesized by a sol-gel process, and the morphology, structure and composition of m-SXCu were characterized. The results show that m-SXCu5 with a high surface area of 463.1 m(2) g(-1) have a mesoporous structure with a pore size of about 2 nm. The addition of Cu from 1 to 5 wt% to m-SXCu had a slight effect on the surface area and a not-so-obvious effect on the mesoporous size of m-SXCu. Cu ions can be released from m-SXCu into the simulated body fluid, and the release rate depends significantly on their number. The m-SXCu possessed good antibacterial activity against both E. coli and S. aureus, in which the antibacterial rate reached 99% for m-SXCu5 at 1 h while reaching 99% for all m-SXCu at 24 h. The antibacterial rate was improved with the increase of the amount of Cu, indicating that addition of Cu ions to m-SX enhanced its antibacterial activity.

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Controlled Deposition of Silver Nanoparticles in Mesoporous Single‐ or Multilayer Thin Films: From Tuned Pore Filling to Selective Spatial Location of Nanometric Objects

Fuertes

Marchena

Marchi

et al. 2009

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101

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Silver nanoparticle assemblies are embedded within mesoporous oxide thin films by an in situ mild reduction leading to nanoparticle-mesoporous oxide thin-film composites (NP@MOTF). A quantitative method based on X-ray reflectivity is developed and validated with energy dispersive spectroscopy in order to assess pore filling. The use of dilute formaldehyde solutions leads to control over the formation of silver nanoparticles within mesoporous titania films. Inclusion of silver nanoparticles in mesoporous silica requires more drastic conditions. This difference in reactivity can be exploited to selectively synthesize nanoparticles in a predetermined layer of a multilayered mesoporous stack leading to complex 1D-ordered multilayers with precise spatial location of nanometric objects. The metal oxide nanocomposites synthesized have potential applications in catalysis, optical devices, surface-enhanced Raman scattering, and metal enhancement fluorescence.

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Influence of the incorporation of metals on the optical properties of MCM-41

Cited by 7 publications

References 35 publications

Chemical characteristics and hemostatic performances of ordered mesoporous calcium-doped silica xerogels

Chemical characteristics and hemostatic performances of ordered mesoporous calcium-doped silica xerogels

Antibacterial properties of mesoporous copper-doped silica xerogels

Controlled Deposition of Silver Nanoparticles in Mesoporous Single‐ or Multilayer Thin Films: From Tuned Pore Filling to Selective Spatial Location of Nanometric Objects

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