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Monitoring sessile droplet evaporation on a micromechanical device

DSpace at IIT Bombay

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Field Value
 
Title Monitoring sessile droplet evaporation on a micromechanical device
 
Creator PRASAD, A
LIN, ATH
RAO, VR
SESHIA, AA
 
Subject QUARTZ-CRYSTAL MICROBALANCE
SOLID-SURFACES
CONTACT-ANGLE
MASS SENSORS
RESONATOR
LIQUID
MODE
OSCILLATOR
PLATFORM
FLUID
 
Description A bulk acoustic mode micro-electro-mechanical dual resonator platform is utilised to study the evaporation of sub-microliter water droplets from the surface of the resonator. An analytical formulation for the observed frequency shift and the measure dependence of resonant frequency on the modes of evaporation which is consistent with the optically derived data. The resonators access only a thin layer of the liquid through shear contact and, hence, the response is not affected by the bulk mass of the droplet to first order. A relationship between the droplet contact area and the elapsed time was established for the evaporation process and is used to derive a value of the diffusion coefficient of water in air that is found to be in reasonable agreement with literature values. This work introduces a new tool for the electro-mechanical monitoring of droplet evaporation with relevance to applications such as biosensing in liquid samples of sub-microliter volumes.
 
Publisher ROYAL SOC CHEMISTRY
 
Date 2014-12-28T11:40:28Z
2014-12-28T11:40:28Z
2014
 
Type Article
 
Identifier ANALYST, 139(21)5538-5546
0003-2654
1364-5528
http://dx.doi.org/10.1039/c4an01389a
http://dspace.library.iitb.ac.in/jspui/handle/100/16383
 
Language English