Antibacterial and Antireflective Thin Films

  • Author: ChemistryViews.org
  • Published: 02 April 2018
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: ACS Applied Materials & Interfaces/ACS Publications
  • Associated Societies: American Chemical Society (ACS), USA
thumbnail image: Antibacterial and Antireflective Thin Films

Light reflection is a problem for lenses and displays and causes, e.g, poor readability and contrast. In addition, surfaces such as phone or tablet touchscreens can host harmful bacteria. A dual-function thin film coating with both antireflective and antibacterial properties would, thus, be very useful for applications in touchscreens, glass surfaces in areas with special hygiene requirements, optical devices in medicine, etc.


Junhui He, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, and Kaikai Wang, Technical Institute of Physics and Chemistry and University of Chinese Academy of Sciences, Beijing, have developed such a dual-purpose thin film based on mesoporous silica with embedded silver nanoparticles (NPs). The team prepared silica sols containing Ag NPs by dissolving poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (P123) in ethanol and then adding silver nitrate and tetraethyl orthosilicate (TEOS). Glass slides were coated by dipping them in the silica sol, followed by calcination at 550–720 °C.


The optical and antibacterial properties of the resulting thin films were tested using transmittance and reflectance spectroscopy and E. coli cultures, respectively. The films show high transmittance of visible light and have excellent antibacterial activity due to the Ag NPs. They also are mechanically robust and can withstand cleaning. According to the researchers, these properties make the films promising for application.


 

Article Views: 825

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


CONNECT:

ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter


A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH