Dr. Tim Still
Postdoc
Laboratory for Research on
the Structure of Matter (LRSM)
University of Pennsylvania
3231 Walnut Street
Philadelphia, PA 19104-6396
phone: (+01) 215 573 4080
email: timstill "at" seas.upenn.edu
_____________________________
Dr. rer. nat. (Ph.D.), Max Planck Institute for Polymer
Research, Gutenberg University Mainz, 2009 (AK Butt)
Dipl.
Chem. , Philipps-Univ. Marburg, 2007 (AK Pilgrim)
working fields:
soft matter physics, colloidal glasses, hydrogel systems,
drop evaporation, carbon nanotubes, polymers,
Brillouin light scattering on colloidal and
non-colloidal samples,
Phononics, nano- and mesoacoustic properties of soft condensed matter
Publications
2012
[13] T. Still, P. J. Yunker, A. G. Yodh, Langmuir 2012, DOI: 10.1021/la204928m.
Surfactant-Induced Marangoni Eddies Alter the Coffee-Rings of Evaporating Colloidal Drops
[12] M. Mattarelli, M. Montagna, T. Still, D. Schneider, G. Fytas, Soft Matter 2012, DOI: 10.1039/c2sm07034k.
Vibration spectroscopy of weakly interacting mesoscopic colloids
2011
[11] P. J. Yunker, T. Still, M. A. Lohr, A. G. Yodh, Nature 2011, 476, 308.
Suppression of the coffee-ring effect by shape-dependent capillary interactions
(with `News & Viewsʹ by J. Vermant, Nature 2011, 476, 286 and cover page;
highlighted in international press, e.g., Le Monde (France), Sueddeutsche Zeitung, Welt (Germany), ORF (Austria),
NPR [radio], MSNBC, Discover Magazin, ABC, International Business Times, New Scientist etc. (USA))
[10] T. Still, G. Gantzounis, D. Kiefer, G. Hellmann, G. Fytas, N. Stefanou, Physical Review Letters 2011, 106, 175505.
Collective Hypersonic Excitations in Strongly Multiple Scattering Colloids
[9] Z. Fakhraai, T. Still (equal contribution), G. Fytas, M. D. Ediger , Journal
of Physical Chemistry Letters 2011, 2, 423.
Structural Variations of an Organic Glassformer Vapor-Deposited onto a Temperature Gradient Stage
2010
[8] T. Still*, M.
Mattarelli, D. Kiefer, G. Fytas, M. Montagna, Journal
of Physical Chemistry Letters 2010, 1, 2440.
Eigenvibrations
of Submicrometer Colloidal Spheres
[7] F.
Stadler, T. Still, G. Fytas, C. Bailly, Macromolecules 2010, 43, 7771.
Elongational
Rheology and Brillouin Light Scattering of Entangled Telechelic
Polybutadiene Based Temporary Networks
[6] T. Still*, M.
Retsch, U. Jonas, R. Sainidou, P. Rembert, K. Mpoukouvalas, G. Fytas, Macromolecules 2010, 43, 3422.
Vibrational
Eigenfrequencies and Mechanical Properties of Mesoscopic Copolymer
Latex Particles
[5] K. L.
Kearns, T. Still (equal contribution), G. Fytas, M. D. Ediger, Advanced
Materials
2010, 22, 39.
High-Modulus
Organic Glasses Prepared by Physical Vapor Deposition
2009
T. Still, High
frequency acoustics in colloid-based meso- and nanostructures by
spontaneous Brillouin light scattering , PhD
thesis, Johannes Gutenberg-Universität Mainz. (printed by Springer (2010), ISBN: 978-3-642-13482-1)
[4] T. Still*, M. D'Acunzi, D. Vollmer, G. Fytas, Journal
of Colloid and Interface Sciences 2009, 340, 42.
Mesospheres
in nano-armor: Probing the shape-persistence of molten polymer colloids
2008
[3] T. Still, R. Sainidou, M. Retsch, U. Jonas, P. Spahn, G. P.
Hellmann, G. Fytas, Nano
Letters
2008, 8, 3194.
The
Music of Core-Shell Spheres and Hollow Capsules: Influence of the
Architecture on the Mechanical Properties at the Nanoscale
(with `Top down, Bottom upʹ in Nature Nanotechnology 2008, 3, 641)
[2] T. Still, W. Cheng, M. Retsch, U. Jonas, G. Fytas, Journal
of
Physics: Condensed Matter 2008, 20, 404203.
Colloidal
systems: a promising material class for tailoring sound propagation at
high frequencies
[1] T. Still, W. Cheng, M. Retsch, R. Sainidou, J. Wang, U. Jonas, N.
Stefanou, G. Fytas,
Physical Review Letters 2008, 100, 194301.
Simultaneous
Occurrence of Structure-Directed and Particle-Resonance-Induced
Phononic Gaps in Colloidal Films
2007
T. Still, Inelastische
Neutronenstreuung an geschmolzenen Natriumhaliden, Diploma
thesis, Philipps-Universität Marburg.
Presentations on international conferences
2012
APS March meeting, Boston, MA, USA, 02/27-03/02/2012:
T.
Still, P. J. Yunker, A. G. Yodh (oral Presentation):
Particle Deposition in Drying Drops of Colloidal Suspensions Containing Different Surfactants
K. Aptowicz, T. Still, Ke Chen, P. J. Yunker, A. G. Yodh (oral Presentation):
Local Perturbation of Quasi Two-Dimensional Colloidal Glasses
2011
6th Gotham-Metro Condensed Matter Meeting, New York, NY, USA, 11/11/2011:
T.
Still , Ke Chen, P. J. Yunker, K. Aptowicz, A. G. Yodh (Poster):
Local Perturbation in Quasi-Two-Dimensional Colloidal Glasses
Mid-Atlantic Soft Matter Workshop (MASM 7), Philadelphia, PA, USA, 06/10/2011:
T.
Still (sound bite):
The Influence of Surfactants on the Coffee-Ring Effect in Drying Colloidal Suspensions
APS March meeting, Dallas, TX, USA, 03/21-25/2011:
T.
Still,
G. Fytas, M. Mattarelli, M. Montagna (oral Presentation):
Colloidal Particle Vibration Spectroscopy
2010
Son et
lumière 2010,
Cargèse, Corse, France, 08/30-09/11/2010:
T.
Still,
G. Fytas (oral Presentation
+ Poster):
Hypersonic
Colloidal Phononics
International
Soft Matter Conference 2010, Granada, Spain, 07/05-08/2010:
T.
Still,
G. Fytas (oral Presentation):
Hypersonic
Phononics
2009
ICPPP 15, Leuven, Belgium,
07/19-23/2009:
T.
Still,
A. Sato, G.
Fytas (oral Presentation):
Tailoring Phonon Propagation
by Mesoscopic Engineering of Soft Matter
APS March meeting,
Pittsburgh, PA, USA, 03/16-20/2009:
T.
Still,
R. Sainidou, G. Hellmann, G. Fytas (oral presentation):
The
“Music” of Silica-Poly(methyl methacrylate)
Core-Shell
Spheres: Eigenvibrations and Mechanical Properties at the
Nanoscale
K. L. Kearns, T. Still,
G. Fytas, M. D. Ediger (Poster):
Brillouin
light scattering measurements of high modulus glasses produced by
physical vapor deposition
Makromolekulares
Kolloquium 2009, Freiburg, Germany, 02/26-28/2009:
M.
Retsch, T.
Still,
W. Cheng, R. Sainidou, U. Jonas, N. Stefanou, G.
Fytas (Poster):
Phononic
Properties of Colloidal Particles and Nanostructured Films
2008
16th
Ostwald Colloquium,
Leipzig, Germany, 09/22-24/2008:
T.
Still,
M. Retsch, R. Sainidou, U. Jonas, G. Fytas (oral
presentation):
High
frequency acoustics in colloidal systems by spontaneous Brillouin light
scattering
Son et
lumière 2008,
Cargèse, Corse, France, 09/01-13/2008:
T.
Still,
M. Retsch, R. Sainidou, W. Cheng, U. Jonas, G. Fytas (oral Presentation
+ Poster):
GHz
acoustics in colloidal systems by spontaneous Brillouin light scattering
Acoustics'08,
Paris,
France, 06/29-07/04/2008:
T.
Still,
M. Retsch, R. Sainidou, U. Jonas, G. Fytas (oral presentation):
High
frequency acoustics in colloidal systems by spontaneous Brillouin light
scattering (J. Acoust. Soc. Am.
2008, 123, 3555.)