Dynamic ellipsometry study on curved thin films at pendent droplet surfaces

Yi Zhang
August 2010
Review of Scientific Instruments;Aug2010, Vol. 81 Issue 8, p085101
Academic Journal
This paper describes the construction of an apparatus that detects the dynamic thickness/reflective-index changes of the curved thin films on the pendent droplet surfaces. The apparatus was constructed by integrating two well-established techniques: null ellipsometry and the pendent drop shape analysis system. The shape analysis system is used to precisely control the height of the objective pendent droplets. This allows the laser beam of ellipsometry to be continually locked in the exact bottom position of the pendent droplets. Such an arrangement facilitates the dynamic investigation of the film thickness as well as the continual monitoring of the surface tension.


Related Articles

  • Instability of a charged spherical drop moving relative to a medium. Grigor’ev, A. I.; Koromyslov, V. A.; Shiryaeva, S. O. // Technical Physics;May99, Vol. 44 Issue 5, p486 

    It is shown that the critical self-charge for the onset of instability of a charged drop in a flow of an ideal fluid decreases as the flow velocity of the fluid past the drop increases, i.e., a complex instability arises which is a superposition of the instabilities of the free surface of the...

  • Liquid-drop formalism and free-energy surfaces in binary homogeneous nucleation theory. Laaksonen, Ari; McGraw, Robert // Journal of Chemical Physics;8/1/1999, Vol. 111 Issue 5, p2019 

    Studies liquid-drop formalism and free-energy surfaces in binary homogeneous nucleation theory. Background on the Oxtoby-Kashchiev derivation; Assumption that the surface of tension of the binary nucleus coincides with the dividing surface specified by the surface condition; Formulas for the...

  • Formation of the condensed phase of metals exposed to intense nanosecond laser pulses at atmospheric pressure. Goncharov, V. K.; Kozadaev, K. V.; Makarov, V. V.; Shchegrikovich, D. V. // Journal of Engineering Physics & Thermophysics;Jul2013, Vol. 86 Issue 4, p805 

    Using the method of laser probing, the basic laws governing the formation of a liquid-droplet phase of a number of metals exposed to intense (10 8–10 9 W/cm 2) nanosecond pulses have been determined. Deposited colloidal nanoparticles have been investigated with the aid of scanning...

  • Molecular simulations of droplet coalescence in oil/water/surfactant systems. Rekvig, Live; Frenkel, Daan // Journal of Chemical Physics;10/7/2007, Vol. 127 Issue 13, p134701 

    We report a molecular simulation study of the mechanism by which droplets covered with a surfactant monolayer coalesce. We study a model system where the rate-limiting step in coalescence is the rupture of the surfactant film. Our simulations allow us to focus on the stages at the core of the...

  • In-situ characterization of the optical and electronic properties in GeTe and GaSb thin films. Velea, A.; Socol, G.; Popescu, M.; Galca, A. C. // Journal of Applied Physics;10/7/2015, Vol. 118 Issue 13, p135712-1 

    GeTe and GaSb thin films obtained by pulsed laser deposition were investigated by spectroscopic ellipsometry at controlled temperatures. The GeTe films were fully amorphous, while the GaSb films were partially crystalized in the as-deposited state. The Tauc-Lorentz model was employed to fit the...

  • Air cushioning in droplet impacts with liquid layers and other droplets. Hicks, Peter D.; Purvis, Richard // Physics of Fluids;Jun2011, Vol. 23 Issue 6, p062104 

    Air cushioning of a high-speed liquid droplet impact with a finite-depth liquid layer sitting upon a rigid impermeable base is investigated. The evolution of the droplet and liquid-layer free-surfaces is studied alongside the pressure in the gas film dividing the two. The model predicts gas...

  • Large bubble entrapment during drop impacts on a restricted liquid surface. Zou, Jun; Ji, Chen; Yuan, BaoGang; Ren, YuLiang; Ruan, XiaoDong; Fu, Xin // Physics of Fluids;May2012, Vol. 24 Issue 5, p057101 

    The behavior of millimetric drops impacting on a gas-liquid interface restricted by surrounding walls is studied using a high-speed video camera. A novel phenomenon of large bubble entrapment is observed in experiments. It is found that the large bubble formation is not only dependent on the...

  • Size effects on the mechanical behavior of gold thin films. Espinosa, H. D.; Prorok, B. C. // Journal of Materials Science;Oct2003, Vol. 38 Issue 20, p4125 

    The Membrane Deflection Experiment was used to test the mechanical response of freestanding thin film gold specimens. We present stress-strain curves obtained on films 0.3, 0.5, and 0.1 μm thick. Elastic modulus was consistently measured in the range of 53–55 GPa. Several size effects...

  • Fluorine diffusion assisted by diffusing silicon on the Si(111)-(7×7) surface. Fujikawa, Y.; Kuwano, S.; Nakayama, K. S.; Nagao, T.; Sadowski, J. T.; Bahktizin, R. Z.; Sakurai, T.; Asari, Y.; Nara, J.; Ohno, T. // Journal of Chemical Physics;12/21/2009, Vol. 129 Issue 23, p234710 

    The diffusion process of fluorine (F) atoms on the Si(111)-(7×7) surface is investigated using high-temperature scanning tunneling microscopy. The kinetic parameters of F hopping agree well with those of the diffusing silicon (Si) atoms, which implies that of all reaction processes, the Si...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics