Acoustic levitation and infrared thermography: a sound approach to studying droplet evaporation

Abstract

A new low-cost technique combining acoustic levitation and infrared thermography for studying the surface temperature of isolated droplets is outlined.

Evaporation kinetics during containerless chemical synthesis of ZIF-8 in levitated droplets

“…The rate of increase in temperature after the temperature decreased of a 2–5 μL methanol droplet in acoustic levitation was measured, and the increase rate of methanol was 4.13 × 10 −2 °C s −1 . 23 And the increase rate of 60 μL levitated droplet in this experiment was 1.16 × 10 −2 °C s −1 .…”

“…The rate of increase in temperature after the temperature decreased of a 2-5 mL methanol droplet in acoustic levitation was measured, and the increase rate of methanol was 4.13 Â 10 À2 1C s À1 . 23 And the increase rate of 60 mL levitated droplet in this experiment was 1.16 Â 10 À2 1C s À1 . Droplet evaporation is a complex multivariate process associated with the droplet size, solvent composition, convection diffusion and surface area.…”

Non-contact droplet manipulation and its dynamics based on acoustic levitation

“…最近研究发现, 声悬浮液滴可避免 蒸发中常见的"咖啡环效应", 为纳米材料的自组装提供 了理想的环境 [239] . 液滴蒸发过程中的形貌(纵横比)、尺 寸变化有可能利用液滴彩虹条纹特征进行精确测量和 实时跟踪 [240,241] , 除此之外, 声悬浮结合红外成像技术也 可以实时监测蒸发过程中液滴表面的温度分布 [242] .…”

Influence of Surface-Active Substances and Substrates on the Wettability of Individual Aerosol Particles during Condensation by Environmental Scanning Electron Microscopy

“…To overcome these limits, singleparticle approaches have been developed recently, which have the advantage of capturing the details necessary to better understand the role of surfactants in mixed soluble particles. 3 The individual-particle analysis approach can be performed by numerous techniques including an electrodynamic balance, 5 an acoustic trap, 6 optical tweezers, 7 and microscopies (such as atomic force microscopy, environmental scanning electron microscopy (ESEM), transmission electron microscopy (TEM), and scanning transmission X-ray microscopy). 8−10 Pioneering research studies focused on the hygroscopic behavior of atmospheric aerosols and different laboratorygenerated salt particles at up to 100% RH in an ESEM.…”

“…To overcome these limits, single-particle approaches have been developed recently, which have the advantage of capturing the details necessary to better understand the role of surfactants in mixed soluble particles . The individual-particle analysis approach can be performed by numerous techniques including an electrodynamic balance, an acoustic trap, optical tweezers, and microscopies (such as atomic force microscopy, environmental scanning electron microscopy (ESEM), transmission electron microscopy (TEM), and scanning transmission X-ray microscopy). − Pioneering research studies focused on the hygroscopic behavior of atmospheric aerosols and different laboratory-generated salt particles at up to 100% RH in an ESEM . Deliquescence and efflorescence relative humidity values (hereafter, DRH and ERH, respectively) of pure salt particles and binary mixed salt particles have been determined by ESEM. , Note that the DRH is defined as the relative humidity (RH) at which the solid particles become aqueous when the RH is increased and the ERH is defined as the RH at which deliquesced particles become dense when the RH is decreased and can finally solidify.…”