Demonstration of temperature-plateau superheated liquid by photothermal conversion of plasmonic titanium nitride nanostructures. Issue 39 (1st October 2018)

• Record Type: Journal Article
• Authors: Ishii, Satoshi; Kamakura, Ryosuke; Sakamoto, Hiroyuki; Dao, Thang D.; Shinde, Satish L.; Nagao, Tadaaki; Fujita, Koji; Namura, Kyoko; Suzuki, Motofumi; Murai, Shunsuke; Tanaka, Katsuhisa
• Is Part Of: Nanoscale. Volume 10:Issue 39(2018)
• Page Start: 18451
• Page End: 18456
• Publication Date: 2018-10-01
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c8nr05931d
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : When photothermally superheated liquid is on a high thermal conductive substrate, the liquid temperature stays constant for a certain range of incident laser power before bubbles are formed. Abstract : A liquid can be heated up above its boiling point, known as superheating. In this metastable state, the liquid temperature keeps increasing as the liquid is being heated. In contrast, we experimentally demonstrate that the temperature of superheated water can be kept constant even at elevated heating power. Water heating is done by the photothermal conversion of plasmonic titanium nitride nanostructures on a sapphire substrate under the illumination of continuous wave laser irradiation. The temperature-constant superheating is also observed for ethylene glycol and 2-acetoxy-1-methoxypropane, and is attributed to the high thermal conductivity of the substrate. This unique superheating yet achieved by a simple method can be useful in optical trapping and various optical heating applications.