The incorporation of noble metal nanoparticles into host matrix thin films: synthesis, characterisation and applications

Walters, G; Parkin, Ivan P.

doi:10.1039/b809646e

Cited by 179 publications

(133 citation statements)

References 97 publications

Supporting

Mentioning

129

Contrasting

Unclassified

Order By: Relevance

“…We suppose that this is why the hydrogel can be micropatterned with an excellent spatial resolution. For further expansion of this achievement, we attempted photo-micropatterning using the reduction of Ag þ into Ag nanoclusters 42,43 . Again, immobilized TiNSs, upon light exposure, allowed for successful replication of the masked pattern in the hydrogel matrix with black dots (Fig.…”

Section: Resultsmentioning

confidence: 99%

Photolatently modulable hydrogels using unilamellar titania nanosheets as photocatalytic crosslinkers

et al. 2013

View full text Add to dashboard Cite

Hydrogels, postmodulable in controlled time and space domains, attract particular attention due to their potential in bio-related applications. Towards this goal, photolatently reactive hydrogels are very promising. Here we develop photolatently modulable hydrogels, composed of a polymer network accommodating photocatalytic titania nanosheets at every crosslinking point. As titania nanosheets can utilize gelling water as their source of radicals, its long-lasting photocatalysis makes the hydrogels readily modulable. Benefiting from the hydrogelation mechanism, the gel network is finely compartmentalized, leading to sharp thermoresponses. As demonstrated by photo-micropatterning, non-diffusible titania nanosheets at the crosslinking points enable pointwise modulations with an excellent spatial resolution. The photolatent nature also makes it possible to conjugate them with other hydrogels and polymers.

show abstract

Section: Resultsmentioning

confidence: 99%

Photolatently modulable hydrogels using unilamellar titania nanosheets as photocatalytic crosslinkers

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Among the various technological applications, the examples in the fields of photovoltaics [12][13][14][15][16][17][18][19], pollutant-degradation materials [20], metamaterials [21], gas sensors [22,23] and those of surface-enhanced raman spectroscopy [24] are of particular importance, associated with several other types of possibilities within optical and sensor devices [25][26][27][28]. Moreover, the interactions of noble metal clusters, dispersed in a dielectric matrix, with biological agents may result in changes of the…”

Section: Introductionmentioning

confidence: 99%

Microstructural evolution of Au/TiO2 nanocomposite films: The influence of Au concentration and thermal annealing

et al. 2015

View full text Add to dashboard Cite

Nanocomposite thin films consisting of a dielectric matrix, such as titanium oxide (TiO 2 ), with embedded gold (Au) nanoparticles were prepared and will be analysed and discussed in detail in the present work. The evolution of morphological and structural features was studied for a wide range of Au concentrations and for annealing treatments in air, for temperatures ranging from 200 to 800 ºC. Major findings revealed that for low Au atomic concentrations (at. %), there are only traces of clustering, and just for relatively high annealing temperatures, T ≥ 500 ºC. Furthermore, the number of Au nanoparticles is extremely low, even for the highest annealing temperature, T = 800 ºC.It is noteworthy that the TiO 2 matrix also crystallizes in the anatase phase for annealing temperatures above 300 ºC.

show abstract

“…The presence of a spectral hole results in the transmitted colour having the same wavelength of that which was used to irradiate the Ag nanoparticles originally. This causes a decrease in the optical extinction peak together with a blue shift in the plasmon resonance for the photoexcited Ag nanoparticles (Walters & Parkin 2009). The brownish-grey colour of the films is a result of the deposition of Ag nanoparticles with various shapes and sizes in the nanopores of the TiO 2 films (Naoi et al 2004(Naoi et al , 2005.…”

Section: (A) Multi-colour Photochromism Of Titanium Oxide Thin Filmsmentioning

confidence: 99%

“…The insertion of gold dopents led to the production of a variety of blue and green films, as opposed to the yellow/brown colour normally associated with vanadium (IV) oxide . Ultraviolet visible spectroscopy indicated that this colour was the result of the presence of a surface plasma resonance (SPR) band associated with the gold nanoparticles (Walters & Parkin 2009). The ratio of gold to vanadium atoms in the film influenced the strength and position of the SPR band.…”

Section: Chemical Vapour Depositionmentioning

confidence: 99%

Thin films for solar control applications

2009

View full text Add to dashboard Cite

The excessive use of heating systems in cold climates and air conditioning systems in hotter climates is resulting in the extensive use of electricity in order to maintain such systems. This in turn leads to the greater use of fossil fuels and higher emissions of carbon dioxide and other pollutant gases. The growing amount of carbon dioxide emissions is contributing to the problem of global warming, hence increasing the need for alternative technologies to heating and air conditioning systems.One such alternative is the production of thin films which can be used as window glazing coatings to construct 'smart windows'. These windows have the greatest use within constant climates. In cold climates, windows with high solar transmittance and low thermal emittance are needed; this allows sunlight into the building to brighten the room but stops heat from escaping thus warming the room. In constantly hot climates, materials that are transparent in the visible region but reflective in the infrared, such as thin metallic coatings, can be used to ensure that the inside of the building remains cool.These solar control coatings, however, pose a problem in varying climates such as in northern and central Europe. For these cases, materials that have altering properties owing to external surroundings could be the solution. These 'chromatic' materials include several categories, such as photochromic glasses and polymers, thermochromic metal oxides and electrochromic materials.This review will begin with a discussion as to the chemistry behind the solar control coatings and chromic materials including ambient radiation and the ideal of a blackbody object. It will then look in depth at each class of these chromic materials considering experimental results and theoretical insight as well as production techniques and applications.

show abstract

The incorporation of noble metal nanoparticles into host matrix thin films: synthesis, characterisation and applications

Cited by 179 publications

References 97 publications

Photolatently modulable hydrogels using unilamellar titania nanosheets as photocatalytic crosslinkers

Photolatently modulable hydrogels using unilamellar titania nanosheets as photocatalytic crosslinkers

Microstructural evolution of Au/TiO2 nanocomposite films: The influence of Au concentration and thermal annealing

Thin films for solar control applications

Contact Info

Product

Resources

About