Structural morphology of acoustically levitated and heated nanosilica droplet | Zendy

Ranganathan Kumar | Zendy; Erick Tijerino | Zendy; Abhishek Saha | Zendy; Saptarshi Basu | Zendy

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Structural morphology of acoustically levitated and heated nanosilica droplet

Author(s) -

Ranganathan Kumar,

Erick Tijerino,

Abhishek Saha,

Saptarshi Basu

Publication year - 2010

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.3493178

Subject(s) - levitation , vaporization , materials science , evaporation , economies of agglomeration , rotation (mathematics) , precipitation , acoustic levitation , morphology (biology) , particle (ecology) , chemical physics , mechanics , optics , chemistry , thermodynamics , chemical engineering , meteorology , physics , geometry , oceanography , magnet , geology , genetics , biology , mathematics , quantum mechanics , engineering

We study the vaporization and precipitation dynamics of a nanosilica encapsulated water droplet by levitating it acoustically and heating it with a CO2 laser. For all concentrations, we observe three phases: solvent evaporation, surface agglomeration, and precipitation leading to bowl or ring shaped structures. At higher concentrations, ring reorientation and rotation are seen consistently. The surface temperature from an infrared camera is seen to be dependent on the final geometrical shape of the droplet and its rotation induced by the acoustic field of the levitator. With nonuniform particle distribution, these structures can experience rupture which modifies the droplet rotational speed. (C) 2010 American Institute of Physics. doi:10.1063/1.3493178

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