Researchers Use Nanoparticles To Block The Heat From The Australian Sun - New Product

Australian researchers at the University of Technology in Sydney have found a way to use nanoparticles to allow light through glass but block most of the heat.

Current technology uses thin silver films to block infrared light but allow the transmission of visible light. The researchers doped a polyvinyl butyral laminate sheet with rare-earth lanthanum hexaboride (LaB6) nanoparticles and sandwiched it between two sheets of clear glass. They found that at nanoparticle concentrations of 0.03 wt%, visible sunlight was reduced by 41% and transmitted heat was reduced by 71%. They have been experimenting with concentrations as low as 0.01 wt%.

The LaB6 works well as it has a resonance peak around 1000nm and therefore absorbs much of the near infrared light in the wavelengths that contribute to heat around 750 to 1300nm.

Higher concentrations of nanoparticles would decrease the transmitted hit but also lower the amount of visible light passing through the glass. The low concentrations currently being used still allow the windows to look transparent but they have a slight green tinge and appear blueish at certain angles.

Posted 9th July 2003

Citations

Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    University of Technology Sydney UTS. (2013, June 11). Researchers Use Nanoparticles To Block The Heat From The Australian Sun - New Product. AZoNano. Retrieved on September 28, 2020 from https://www.azonano.com/article.aspx?ArticleID=580.

  • MLA

    University of Technology Sydney UTS. "Researchers Use Nanoparticles To Block The Heat From The Australian Sun - New Product". AZoNano. 28 September 2020. <https://www.azonano.com/article.aspx?ArticleID=580>.

  • Chicago

    University of Technology Sydney UTS. "Researchers Use Nanoparticles To Block The Heat From The Australian Sun - New Product". AZoNano. https://www.azonano.com/article.aspx?ArticleID=580. (accessed September 28, 2020).

  • Harvard

    University of Technology Sydney UTS. 2013. Researchers Use Nanoparticles To Block The Heat From The Australian Sun - New Product. AZoNano, viewed 28 September 2020, https://www.azonano.com/article.aspx?ArticleID=580.

Tell Us What You Think

Do you have a review, update or anything you would like to add to this article?

Leave your feedback
Submit