LED-controlled tuning of ZnO nanowires’ wettability for biosensing applications

Nano Reviews & Experiments

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Title LED-controlled tuning of ZnO nanowires’ wettability for biosensing applications
 
Creator Bhavsar, Kaushalkumar; Robert Gordon University
Ross, Duncan; Robert Gordon University
Prabhu, Radhakrishna; Robert Gordon University
Pollard, Pat; Robert Gordon University
 
Subject surface energy; contact angle; surface wetting angle; hydrophobic surface; hydrophilic surface
 
Description Background: Wettability is an important property of solid materials which can be controlled by surface energy. Dynamic control over the surface wettability is of great importance for biosensing applications. Zinc oxide (ZnO) is a biocompatible material suitable for biosensors and microfluidic devices. Nanowires of ZnO tend to show a hydrophobic nature which decelerates the adhesion or adsorption of biomolecules on the surface and, therefore, limits their application.Methods: Surface wettability of the ZnO nanowires can be tuned using light irradiation. However, the control over wettability using light-emitting diodes (LEDs) and the role of wavelength in controlling the wettability of ZnO nanowires are unclear. This is the first report on LED-based wettability control of nanowires, and it includes investigations on tuning the desired wettability of ZnO nanowires using LEDs as a controlling tool.Results: The investigations on spectral properties of the LED emission on ZnO nanowires' wettability have shown strong dependency on the spectral overlap of LED emission on ZnO absorption spectra. Results indicate that LEDs offer an advanced control on dynamically tuning the wettability of ZnO nanowires.Conclusion: The spectral investigations have provided significant insight into the role of irradiating wavelength of light and irradiation time on the surface wettability of ZnO nanowires. This process is suitable to realize on chip based integrated sensors and has huge potential for eco-friendly biosensing and environmental sensing applications.Keywords: surface energy; contact angle; surface wetting angle; hydrophobic surface; hydrophilic surface(Published: 7 April 2015)Citation: Nano Reviews 2015, 6: 26711 - http://dx.doi.org/10.3402/nano.v6.26711
 
Publisher Co-Action Publishing
 
Contributor SFC, UKIERI, Carnegie Trust UK
 
Date 2015-04-07
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion

 
Format application/pdf
text/html
application/epub+zip
application/xml
 
Identifier http://www.nanoreviewsexperiments.net/index.php/nano/article/view/26711
10.3402/nr.v6.26711
 
Source Nano Reviews & Experiments; Vol 6 (2015) incl Supplements
2002-2727
 
Language eng
 
Relation http://www.nanoreviewsexperiments.net/index.php/nano/article/view/26711/39433
http://www.nanoreviewsexperiments.net/index.php/nano/article/view/26711/39434
http://www.nanoreviewsexperiments.net/index.php/nano/article/view/26711/39435
http://www.nanoreviewsexperiments.net/index.php/nano/article/view/26711/39436
http://www.nanoreviewsexperiments.net/index.php/nano/article/downloadSuppFile/26711/17975
http://www.nanoreviewsexperiments.net/index.php/nano/article/downloadSuppFile/26711/17976
http://www.nanoreviewsexperiments.net/index.php/nano/article/downloadSuppFile/26711/19364
http://www.nanoreviewsexperiments.net/index.php/nano/article/downloadSuppFile/26711/19365
http://www.nanoreviewsexperiments.net/index.php/nano/article/downloadSuppFile/26711/19368
http://www.nanoreviewsexperiments.net/index.php/nano/article/downloadSuppFile/26711/19369
 

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