Efficient NIR light blockage with matrix embedded silver nanoprism thin films for energy saving window coating

Carboni, M.; Carravetta, Marina; Zhang, Xunli; Stulz, Eugen

doi:10.1039/c6tc00026f

Cited by 29 publications

(17 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A silica shell was applied on the outer surface to protect the Ag-NPrs from aggregation, agglomeration, etching, and environmental damage [49]. The growth of the silica shell was achieved in an ammonium solution using alkoxysilane chemistry with the assistance of N-octyltrimethoxysilane (OTES) [48,50].…”

Section: Resultsmentioning

confidence: 99%

Robust Synthesis of Size-Dispersal Triangular Silver Nanoprisms via Chemical Reduction Route and Their Cytotoxicity

Bahlol

Foda

2019

Nanomaterials

View full text Add to dashboard Cite

Triangular silver nanocrystals, well-known as nanoprisms (Ag-NPrs), were successfully developed via a robust and straightforward direct chemical reduction synthetic approach, producing desirable tiny and well-controlled Ag-NPrs. This procedure was accomplished by fabricating a mixture of di-sodium succinate hexa-hydrate (DSSH) and tri-sodium citrate di-hydrate (TSCD) as capping agents at optimal synthetic conditions and under an open-air condition, which proved to be an enormous challenge. Additionally, the Ag-NPrs were fully characterized by UV-vis spectra, X-ray diffraction (XRD), scanning electron microscope (SEM), and dynamic light scattering (DLS). Likewise, the formation stages from spherical silver nanoparticles (Ag-NPs) to triangular Ag-NPrs were also captured simultaneously via transmission electron microscope (TEM) and high-resolution transmission electron microscope (HR-TEM) images. More interestingly, an active thin silica-shell was efficiently applied on the Ag-NPrs outer-layer to increase their functionality. Furthermore, to confirm their biocompatibility, we also carried out cell viability assays for the Ag-NPs, Ag-NPrs, and Ag-NPrs@SiO2 with different concentrations at 62.5, 125, and 250 µg/mL after 12, 24, and 48 h of exposure time, respectively, on a regular African green monkey kidney cell line. The cell viability test results exemplified that the three silver nanostructures were toxic-free and suitable for further potential biological applications in the near future.

show abstract

Section: Resultsmentioning

confidence: 99%

Robust Synthesis of Size-Dispersal Triangular Silver Nanoprisms via Chemical Reduction Route and Their Cytotoxicity

Bahlol

Foda

2019

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…In order to evaluate the efficiency of the cluster coating as energy-saving materials, different figure of merit (FOM) values ( T vis , T sol and T vis / T sol ) (table 1; electronic supplementary material) and CIE colour coordinates ( x, y ) (figure 8) of the Nb 6 or Mo 6 @PMMA films were calculated by using a previously developed equation [33]. T sol is the integrated spectral transmittance of a window weighted with the normalized solar energy distribution spectrum, whereas T vis was calculated in a similar way, but weighted with the photopic response of the human eye [73–76]. The x and y values are in agreement with the observed colour of the films.…”

Section: Resultsmentioning

confidence: 99%

Transparent functional nanocomposite films based on octahedral metal clusters: synthesis by electrophoretic deposition process and characterization

et al. 2019

View full text Add to dashboard Cite

Transparent optical thin films have recently attracted a growing interest for functional window applications. In this study, highly visible transparent nanocomposite films with ultraviolet (UV)-near-infrared (NIR)-blocking capabilities are reported. Such films, composed of Mo 6 and Nb 6 octahedral metal atom clusters (MC) and polymethylmethacrylate polymer (PMMA), were prepared by electrophoretic deposition on indium tin oxide-coated glass (ITO glass). PMMA was found to improve both the chemical and physical stability of Mo 6 and Nb 6 MCs, resulting in a relatively homogeneous distribution of the clusters within the PMMA matrix, as seen by microstructural observations. The optical absorption spectrum of these transparent MC@polymer nanocomposite films was marked by contributions from their Mo 6 and Nb 6 -based clusters (absorption in the UV range) and from the ITO layer on silica glass (absorption in the NIR range). Mo 6 @PMMA nanocomposite films also exhibited excellent photoluminescence properties, which were preserved even after exposure to 50°C at a relative humidity of 70% for one month. These films cumulate high transparency in the visible range with remarkable UV-NIR blocking properties and represent interesting candidates for functional glass application.

show abstract

“…which is secreted or leaked to the extracellular environment (2). Here, the electron shuttle cycling occurs in a similar way to intracellular production (3), and AgNP growth can then occur (4). However, smaller spherical particles are more often observed in extracellular production.…”

Section: Mechanisms Of Silver Nanoparticle Biosynthesismentioning

confidence: 99%

“…The broad potential uses of these nanomaterials include catalysts, anti-cancer therapeutics, antimicrobials, diagnostics, water treatment, and energy-saving glazing, among others. (1)(2)(3)(4)(5)(6)(7)(8)(9) Of these particles, silver nanoparticles (AgNPs) have received much attention for their physical and chemical properties, as well as the range of production methods available. The material characteristics which lend themselves to these uses come from two key features of AgNPs: very high surface-area-to-volume ratios and surface plasmons.…”

Section: Introductionmentioning

confidence: 99%

“…An NAD(P)H-dependent nitrate reductase is thought to reduce an electron shuttle via the oxidation of NAD(P)H to NAD(P) +(3). The electron shuttle facilitates the electron transfer from the reductase to SilE(4), though the electron exchange does not need SilE to occur. Following reduction, Ag 0 atoms undergo nucleation to form seed particles(5).Extracellular production of AgNP, such as when using cell-free extract, through an enzymatic route likely results from the innate expression of an NAD(P)H-dependent nitrate reductase(1),…”

mentioning

confidence: 99%

See 1 more Smart Citation

Bacteria and nanosilver: the quest for optimal production

Mabey

Cristaldi

Oyston

et al. 2019

Critical Reviews in Biotechnology

View full text Add to dashboard Cite

Silver nanoparticles (AgNPs) have potential uses in many applications, but current chemical production methods are challenged by scalability, limited particle stability, and the use of hazardous chemicals. The biological processes present in bacteria to mitigate metallic contaminants in their environment present a potential solution to these challenges. Before commercial exploitation of this technology can be achieved, the quality of bacteriogenic AgNPs needs to be improved for certain applications. While the colloidal and morphological stabilities of biogenic AgNPs are widely regarded as superior to chemogenic particles, little control over the synthesis of particle morphologies has been achieved in biological systems. This article reviews a range of biosynthetic reaction conditions and how they affect AgNP formation in bacteria to understand which are most influential. While there remains uncertainty, some general trends are emerging: higher Ag + concentrations result in higher AgNP production, up to a point at which the toxic effects begin to dominate; the optimal temperature appears to be heavily species-dependent and linked to the optimal growth temperature of the organism. However, hotter conditions generally favour higher production rates, while colder environments typically give greater shape diversity. Little attention has been paid to other potentially important growth conditions including halide concentrations, oxygen exposure, and irradiation with light. To fully exploit biosynthetic production routes as alternatives to chemical methods, hurdles remain with controlling particle morphologies and require further work to elucidate and harness. By better understanding the factors influencing AgNP production a foundation can be laid from which shape-controlled production can be achieved.

show abstract

Efficient NIR light blockage with matrix embedded silver nanoprism thin films for energy saving window coating

Abstract: Highly efficient composite films, consisting of silica coated and functionalised silver nanoprisms (SNPs) which are covalently embedded in a PMMA matrix, are presented as a low-cost material to reduce thermal radiation flux with low impact on daylight transmission.

Cited by 29 publications

References 40 publications

Robust Synthesis of Size-Dispersal Triangular Silver Nanoprisms via Chemical Reduction Route and Their Cytotoxicity

Robust Synthesis of Size-Dispersal Triangular Silver Nanoprisms via Chemical Reduction Route and Their Cytotoxicity

Transparent functional nanocomposite films based on octahedral metal clusters: synthesis by electrophoretic deposition process and characterization

Bacteria and nanosilver: the quest for optimal production

Contact Info

Product

Resources

About