Effect of Substrate Temperature on Pattern Formation of Nanoparticles from Volatile Drops - Université Polytechnique des Hauts-de-France Access content directly
Journal Articles Langmuir Year : 2015

Effect of Substrate Temperature on Pattern Formation of Nanoparticles from Volatile Drops

Abstract

This study investigates pattern formation during evaporation of water-based nanofluid sessile droplets placed on a smooth silicon surface at various temperatures. An infrared thermography technique was employed to observe the temperature distribution along the air–liquid interface of evaporating droplets. In addition, an optical interferometry technique is used to quantify and characterize the deposited patterns. Depending on the substrate temperature, three distinctive deposition patterns are observed: a nearly uniform coverage pattern, a “dual-ring” pattern, and multiple rings corresponding to “stick–slip” pattern. At all substrate temperatures, the internal flow within the drop builds a ringlike cluster of the solute on the top region of drying droplets, which is found essential for the formation of the secondary ring deposition onto the substrate for the deposits with the “dual-ring” pattern. The size of the secondary ring is found to be dependent on the substrate temperature. For the deposits with the rather uniform coverage pattern, the ringlike cluster of the solute does not deposit as a distinct secondary ring; instead, it is deformed by the contact line depinning. In the case of the “stick–slip” pattern, the internal flow behavior is complex and found to be vigorous with rapid circulating flow which appears near the edge of the drop.

Dates and versions

hal-03448690 , version 1 (25-11-2021)

Identifiers

Cite

Maryam Maria Parsa, Souad Harmand, Khellil Sefiane, Maxence Bigerelle, Raphaël Deltombe. Effect of Substrate Temperature on Pattern Formation of Nanoparticles from Volatile Drops. Langmuir, 2015, 31 (11), pp.3354-3367. ⟨10.1021/acs.langmuir.5b00362⟩. ⟨hal-03448690⟩
18 View
0 Download

Altmetric

Share

Gmail Facebook X LinkedIn More