Sader Research Group
We are interested in research questions from a wide array of areas, ranging from understanding the mechanics of small devices, which includes the break down of standard continuum models at nanometre length scales, to large-scale phenomena such as flows generated by spacecraft. A sample of current research topics is below.
|Cantilever spring constant calibration||Cantilever mechanics|
|Dynamic force microscopy|
|DSMC methods||Lattice Boltzmann methods|
|Water bells formed from below||Spacecraft aerodynamics|
|Turbulence in channel flow|
|Cantilever beams immersed in fluid||Microfluidic beam resonators||Nanoparticle mechanics|
|Surface effects in nanoscale devices||Brownian ratchet motors|
Experimental and theoretical investigations into the design and operation of motors that utilize Brownian motion.
[Collaborators: University of Melbourne (Chemistry)]
Representative publication:J. Lim, J. E. Sader and P. Mulvaney, "Electrodynamic ratchet motor", Physical Review E, 79, 030105 (2009).
Effects of surfaces on the mechanical properties of nanoscale cantilever devices and applications.
[Collaborators: California Institute of Technology]
Representative publication:M. J. Lachut and J. E. Sader, "Effect of surface stress on the stiffness of cantilever plates", Physical Review Letters, 99, 206102 (2007).
Investigations into the mechanical properties of nanoparticles using ultra fast laser experiments and theory.
[Collaborators: Argonne National Laboratory,
University of Chicago (James Franck Institute),
University of Notre Dame]
Representative publication:M. Pelton, J. E. Sader, J. Burgin, M. Liu, P. Guyot-Sionnest and D. Gosztola, "Damping of acoustic vibrations in gold nanoparticles", Nature Nanotechnology, 4, 492-495 (2009).
Theoretical and experimental investigations into fluid flow generated within microfluidic beam resonators.
[Collaborators: Massachusetts Institute of Technology (Mechanical Engineering and Biological Engineering)]
Representative publication:J. E. Sader, T. P. Burg and S. R. Manalis, "Energy dissipation in microfluidic beam resonators", Journal of Fluid Mechanics, 650, 215-250 (2010).
Theoretical and experimental investigations into the fluid-structure interaction of cantilever beams immersed in fluid.
[Collaborators: Trinity College Dublin, University of Melbourne (Chemistry)]
Representative publication:J. E. Sader, "Frequency response of cantilever beams immersed in viscous fluids with applications to the atomic force microscope”, Journal of Applied Physics, 84, 64-76 (1998).
Fundamental theoretical studies into the nature of turbulent flows generated in channels.
[Collaborators: University of Melbourne (Mechanical Engineering)]
Representative publication:J. D. Woodcock, J. E. Sader and I. Marusic, "On the maximum drag reduction due to added polymers in Poiseuille flow", Journal of Fluid Mechanics, 659, 473-483 (2010).
Hypersonic flows generated by spacecraft entering the atmosphere of planet and their impact on stability and drag.
Representative publication:E. C. Button, C. R. Lilley, N. S. Mackenzie and J. E. Sader, "Blunted-cone heat shields of atmospheric entry vehicles", AIAA Journal, 47, 1784-1787 (2009).
Investigation of fluid flow phenomena generated when a liquid jet impacts the underside of a solid plate.
[Collaborators: University of Cambridge, University of Newcastle]
Representative publication:E. C. Button, J. F. Davidson, G. J. Jameson and J. E. Sader, "Water bells formed on the underside of a horizontal plate. Part 2. Theory", Journal of Fluid Mechanics, 649, 45-68 (2010).
Fundamentals and applications of Lattice Boltzmann (LB) methods for simulating fluid flow in nanoscale devices.
[Collaborators: Los Alamos National Laboratory]
Representative publication:Y. Shi and J. E. Sader, "Lattice Boltzmann method for oscillatory Stokes flow with applications to micro- and nanodevices", Physical Review E, 81, 036706 (2010).
Fundamentals and applications of direct simulation Monte Carlo (DSMC) methods for simulating gas flow in nanoscale devices.
Representative publication:C. R. Lilley and J. E. Sader, "Velocity profile in the Knudsen layer according to the Boltzmann equation", Proceedings of the Royal Society A, 464, 2015-2035 (2008).
Theoretical framework for extraction of force, energy and tunelling current from dynamic atomic force microscope measurements.
[Collaborators: Osaka University, Trinity College Dublin, University College Dublin]
Representative publication:J. E. Sader and S. P. Jarvis, "Accurate formulas for interaction force and energy in frequency modulation force spectroscopy”, Applied Physics Letters, 84, 1801-1803 (2004).
Fundamental studies into the mechanical properties of cantilevers with applications to the Atomic Force Microscope.
Representative publication:J. E. Sader, I. Larson, P. Mulvaney and L. R. White, "Method for the calibration of atomic force microscope cantilevers”, Review of Scientific Instruments, 66, 3789-3798 (1995).
Noninvasive method for measuring spring constant of Atomic Force Microscope cantilevers – “Sader method”.
[Collaborators: University of Melbourne (Chemistry, Mechanical Engineering)]
Representative publication:J. E. Sader, J. W. M. Chon and P. Mulvaney, "Calibration of rectangular atomic force microscope cantilevers”, Review of Scientific Instruments, 70, 3967-3969 (1999).