---
_id: '7767'
abstract:
- lang: eng
text: We present a model of soft active particles that leads to a rich array of
collective behavior found also in dense biological swarms of bacteria and other
unicellular organisms. Our model uses only local interactions, such as Vicsek-type
nearest-neighbor alignment, short-range repulsion, and a local boundary term.
Changing the relative strength of these interactions leads to migrating swarms,
rotating swarms, and jammed swarms, as well as swarms that exhibit run-and-tumble
motion, alternating between migration and either rotating or jammed states. Interestingly,
although a migrating swarm moves slower than an individual particle, the diffusion
constant can be up to three orders of magnitude larger, suggesting that collective
motion can be highly advantageous, for example, when searching for food.
article_number: '032706'
article_processing_charge: No
article_type: original
author:
- first_name: Ruben
full_name: van Drongelen, Ruben
last_name: van Drongelen
- first_name: Anshuman
full_name: Pal, Anshuman
last_name: Pal
- first_name: Carl Peter
full_name: Goodrich, Carl Peter
id: EB352CD2-F68A-11E9-89C5-A432E6697425
last_name: Goodrich
orcid: 0000-0002-1307-5074
- first_name: Timon
full_name: Idema, Timon
last_name: Idema
citation:
ama: van Drongelen R, Pal A, Goodrich CP, Idema T. Collective dynamics of soft active
particles. Physical Review E. 2015;91(3). doi:10.1103/physreve.91.032706
apa: van Drongelen, R., Pal, A., Goodrich, C. P., & Idema, T. (2015). Collective
dynamics of soft active particles. Physical Review E. American Physical
Society. https://doi.org/10.1103/physreve.91.032706
chicago: Drongelen, Ruben van, Anshuman Pal, Carl Peter Goodrich, and Timon Idema.
“Collective Dynamics of Soft Active Particles.” Physical Review E. American
Physical Society, 2015. https://doi.org/10.1103/physreve.91.032706.
ieee: R. van Drongelen, A. Pal, C. P. Goodrich, and T. Idema, “Collective dynamics
of soft active particles,” Physical Review E, vol. 91, no. 3. American
Physical Society, 2015.
ista: van Drongelen R, Pal A, Goodrich CP, Idema T. 2015. Collective dynamics of
soft active particles. Physical Review E. 91(3), 032706.
mla: van Drongelen, Ruben, et al. “Collective Dynamics of Soft Active Particles.”
Physical Review E, vol. 91, no. 3, 032706, American Physical Society, 2015,
doi:10.1103/physreve.91.032706.
short: R. van Drongelen, A. Pal, C.P. Goodrich, T. Idema, Physical Review E 91 (2015).
date_created: 2020-04-30T11:41:38Z
date_published: 2015-03-01T00:00:00Z
date_updated: 2021-01-12T08:15:24Z
day: '01'
doi: 10.1103/physreve.91.032706
extern: '1'
intvolume: ' 91'
issue: '3'
language:
- iso: eng
month: '03'
oa_version: None
publication: Physical Review E
publication_identifier:
issn:
- 1539-3755
- 1550-2376
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
status: public
title: Collective dynamics of soft active particles
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 91
year: '2015'
...
---
_id: '7768'
abstract:
- lang: eng
text: We investigate the vibrational modes of quasi-two-dimensional disordered colloidal
packings of hard colloidal spheres with short-range attractions as a function
of packing fraction. Certain properties of the vibrational density of states (vDOS)
are shown to correlate with the density and structure of the samples (i.e., in
sparsely versus densely packed samples). Specifically, a crossover from dense
glassy to sparse gel-like states is suggested by an excess of phonon modes at
low frequency and by a variation in the slope of the vDOS with frequency at low
frequency. This change in phonon mode distribution is demonstrated to arise largely
from localized vibrations that involve individual and/or small clusters of particles
with few local bonds. Conventional order parameters and void statistics did not
exhibit obvious gel-glass signatures as a function of volume fraction. These mode
behaviors and accompanying structural insights offer a potentially new set of
indicators for identification of glass-gel transitions and for assignment of gel-like
versus glass-like character to a disordered solid material.
article_number: '062305'
article_processing_charge: No
article_type: original
author:
- first_name: Matthew A.
full_name: Lohr, Matthew A.
last_name: Lohr
- first_name: Tim
full_name: Still, Tim
last_name: Still
- first_name: Raman
full_name: Ganti, Raman
last_name: Ganti
- first_name: Matthew D.
full_name: Gratale, Matthew D.
last_name: Gratale
- first_name: Zoey S.
full_name: Davidson, Zoey S.
last_name: Davidson
- first_name: Kevin B.
full_name: Aptowicz, Kevin B.
last_name: Aptowicz
- first_name: Carl Peter
full_name: Goodrich, Carl Peter
id: EB352CD2-F68A-11E9-89C5-A432E6697425
last_name: Goodrich
orcid: 0000-0002-1307-5074
- first_name: Daniel M.
full_name: Sussman, Daniel M.
last_name: Sussman
- first_name: A. G.
full_name: Yodh, A. G.
last_name: Yodh
citation:
ama: Lohr MA, Still T, Ganti R, et al. Vibrational and structural signatures of
the crossover between dense glassy and sparse gel-like attractive colloidal packings.
Physical Review E. 2014;90(6). doi:10.1103/physreve.90.062305
apa: Lohr, M. A., Still, T., Ganti, R., Gratale, M. D., Davidson, Z. S., Aptowicz,
K. B., … Yodh, A. G. (2014). Vibrational and structural signatures of the crossover
between dense glassy and sparse gel-like attractive colloidal packings. Physical
Review E. American Physical Society. https://doi.org/10.1103/physreve.90.062305
chicago: Lohr, Matthew A., Tim Still, Raman Ganti, Matthew D. Gratale, Zoey S. Davidson,
Kevin B. Aptowicz, Carl Peter Goodrich, Daniel M. Sussman, and A. G. Yodh. “Vibrational
and Structural Signatures of the Crossover between Dense Glassy and Sparse Gel-like
Attractive Colloidal Packings.” Physical Review E. American Physical Society,
2014. https://doi.org/10.1103/physreve.90.062305.
ieee: M. A. Lohr et al., “Vibrational and structural signatures of the crossover
between dense glassy and sparse gel-like attractive colloidal packings,” Physical
Review E, vol. 90, no. 6. American Physical Society, 2014.
ista: Lohr MA, Still T, Ganti R, Gratale MD, Davidson ZS, Aptowicz KB, Goodrich
CP, Sussman DM, Yodh AG. 2014. Vibrational and structural signatures of the crossover
between dense glassy and sparse gel-like attractive colloidal packings. Physical
Review E. 90(6), 062305.
mla: Lohr, Matthew A., et al. “Vibrational and Structural Signatures of the Crossover
between Dense Glassy and Sparse Gel-like Attractive Colloidal Packings.” Physical
Review E, vol. 90, no. 6, 062305, American Physical Society, 2014, doi:10.1103/physreve.90.062305.
short: M.A. Lohr, T. Still, R. Ganti, M.D. Gratale, Z.S. Davidson, K.B. Aptowicz,
C.P. Goodrich, D.M. Sussman, A.G. Yodh, Physical Review E 90 (2014).
date_created: 2020-04-30T11:41:54Z
date_published: 2014-12-05T00:00:00Z
date_updated: 2021-01-12T08:15:24Z
day: '05'
doi: 10.1103/physreve.90.062305
extern: '1'
intvolume: ' 90'
issue: '6'
language:
- iso: eng
month: '12'
oa_version: None
publication: Physical Review E
publication_identifier:
issn:
- 1539-3755
- 1550-2376
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
status: public
title: Vibrational and structural signatures of the crossover between dense glassy
and sparse gel-like attractive colloidal packings
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 90
year: '2014'
...
---
_id: '7769'
abstract:
- lang: eng
text: 'Athermal packings of soft repulsive spheres exhibit a sharp jamming transition
in the thermodynamic limit. Upon further compression, various structural and mechanical
properties display clean power-law behavior over many decades in pressure. As
with any phase transition, the rounding of such behavior in finite systems close
to the transition plays an important role in understanding the nature of the transition
itself. The situation for jamming is surprisingly rich: the assumption that jammed
packings are isotropic is only strictly true in the large-size limit, and finite-size
has a profound effect on the very meaning of jamming. Here, we provide a comprehensive
numerical study of finite-size effects in sphere packings above the jamming transition,
focusing on stability as well as the scaling of the contact number and the elastic
response.'
article_number: '022138'
article_processing_charge: No
article_type: original
author:
- first_name: Carl Peter
full_name: Goodrich, Carl Peter
id: EB352CD2-F68A-11E9-89C5-A432E6697425
last_name: Goodrich
orcid: 0000-0002-1307-5074
- first_name: Simon
full_name: Dagois-Bohy, Simon
last_name: Dagois-Bohy
- first_name: Brian P.
full_name: Tighe, Brian P.
last_name: Tighe
- first_name: Martin
full_name: van Hecke, Martin
last_name: van Hecke
- first_name: Andrea J.
full_name: Liu, Andrea J.
last_name: Liu
- first_name: Sidney R.
full_name: Nagel, Sidney R.
last_name: Nagel
citation:
ama: 'Goodrich CP, Dagois-Bohy S, Tighe BP, van Hecke M, Liu AJ, Nagel SR. Jamming
in finite systems: Stability, anisotropy, fluctuations, and scaling. Physical
Review E. 2014;90(2). doi:10.1103/physreve.90.022138'
apa: 'Goodrich, C. P., Dagois-Bohy, S., Tighe, B. P., van Hecke, M., Liu, A. J.,
& Nagel, S. R. (2014). Jamming in finite systems: Stability, anisotropy, fluctuations,
and scaling. Physical Review E. American Physical Society. https://doi.org/10.1103/physreve.90.022138'
chicago: 'Goodrich, Carl Peter, Simon Dagois-Bohy, Brian P. Tighe, Martin van Hecke,
Andrea J. Liu, and Sidney R. Nagel. “Jamming in Finite Systems: Stability, Anisotropy,
Fluctuations, and Scaling.” Physical Review E. American Physical Society,
2014. https://doi.org/10.1103/physreve.90.022138.'
ieee: 'C. P. Goodrich, S. Dagois-Bohy, B. P. Tighe, M. van Hecke, A. J. Liu, and
S. R. Nagel, “Jamming in finite systems: Stability, anisotropy, fluctuations,
and scaling,” Physical Review E, vol. 90, no. 2. American Physical Society,
2014.'
ista: 'Goodrich CP, Dagois-Bohy S, Tighe BP, van Hecke M, Liu AJ, Nagel SR. 2014.
Jamming in finite systems: Stability, anisotropy, fluctuations, and scaling. Physical
Review E. 90(2), 022138.'
mla: 'Goodrich, Carl Peter, et al. “Jamming in Finite Systems: Stability, Anisotropy,
Fluctuations, and Scaling.” Physical Review E, vol. 90, no. 2, 022138,
American Physical Society, 2014, doi:10.1103/physreve.90.022138.'
short: C.P. Goodrich, S. Dagois-Bohy, B.P. Tighe, M. van Hecke, A.J. Liu, S.R. Nagel,
Physical Review E 90 (2014).
date_created: 2020-04-30T11:42:09Z
date_published: 2014-08-27T00:00:00Z
date_updated: 2021-01-12T08:15:24Z
day: '27'
doi: 10.1103/physreve.90.022138
extern: '1'
intvolume: ' 90'
issue: '2'
language:
- iso: eng
month: '08'
oa_version: None
publication: Physical Review E
publication_identifier:
issn:
- 1539-3755
- 1550-2376
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
status: public
title: 'Jamming in finite systems: Stability, anisotropy, fluctuations, and scaling'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 90
year: '2014'
...
---
_id: '7770'
abstract:
- lang: eng
text: Packings of frictionless athermal particles that interact only when they overlap
experience a jamming transition as a function of packing density. Such packings
provide the foundation for the theory of jamming. This theory rests on the observation
that, despite the multitude of disordered configurations, the mechanical response
to linear order depends only on the distance to the transition. We investigate
the validity and utility of such measurements that invoke the harmonic approximation
and show that, despite particles coming in and out of contact, there is a well-defined
linear regime in the thermodynamic limit.
article_number: '022201'
article_processing_charge: No
article_type: original
author:
- first_name: Carl Peter
full_name: Goodrich, Carl Peter
id: EB352CD2-F68A-11E9-89C5-A432E6697425
last_name: Goodrich
orcid: 0000-0002-1307-5074
- first_name: Andrea J.
full_name: Liu, Andrea J.
last_name: Liu
- first_name: Sidney R.
full_name: Nagel, Sidney R.
last_name: Nagel
citation:
ama: Goodrich CP, Liu AJ, Nagel SR. Contact nonlinearities and linear response in
jammed particulate packings. Physical Review E. 2014;90(2). doi:10.1103/physreve.90.022201
apa: Goodrich, C. P., Liu, A. J., & Nagel, S. R. (2014). Contact nonlinearities
and linear response in jammed particulate packings. Physical Review E.
American Physical Society. https://doi.org/10.1103/physreve.90.022201
chicago: Goodrich, Carl Peter, Andrea J. Liu, and Sidney R. Nagel. “Contact Nonlinearities
and Linear Response in Jammed Particulate Packings.” Physical Review E.
American Physical Society, 2014. https://doi.org/10.1103/physreve.90.022201.
ieee: C. P. Goodrich, A. J. Liu, and S. R. Nagel, “Contact nonlinearities and linear
response in jammed particulate packings,” Physical Review E, vol. 90, no.
2. American Physical Society, 2014.
ista: Goodrich CP, Liu AJ, Nagel SR. 2014. Contact nonlinearities and linear response
in jammed particulate packings. Physical Review E. 90(2), 022201.
mla: Goodrich, Carl Peter, et al. “Contact Nonlinearities and Linear Response in
Jammed Particulate Packings.” Physical Review E, vol. 90, no. 2, 022201,
American Physical Society, 2014, doi:10.1103/physreve.90.022201.
short: C.P. Goodrich, A.J. Liu, S.R. Nagel, Physical Review E 90 (2014).
date_created: 2020-04-30T11:42:24Z
date_published: 2014-08-04T00:00:00Z
date_updated: 2021-01-12T08:15:25Z
day: '04'
doi: 10.1103/physreve.90.022201
extern: '1'
intvolume: ' 90'
issue: '2'
language:
- iso: eng
month: '08'
oa_version: None
publication: Physical Review E
publication_identifier:
issn:
- 1539-3755
- 1550-2376
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
status: public
title: Contact nonlinearities and linear response in jammed particulate packings
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 90
year: '2014'
...
---
_id: '7772'
abstract:
- lang: eng
text: Particle tracking and displacement covariance matrix techniques are employed
to investigate the phonon dispersion relations of two-dimensional colloidal glasses
composed of soft, thermoresponsive microgel particles whose temperature-sensitive
size permits in situ variation of particle packing fraction. Bulk, B, and shear,
G, moduli of the colloidal glasses are extracted from the dispersion relations
as a function of packing fraction, and variation of the ratio G/B with packing
fraction is found to agree quantitatively with predictions for jammed packings
of frictional soft particles. In addition, G and B individually agree with numerical
predictions for frictional particles. This remarkable level of agreement enabled
us to extract an energy scale for the interparticle interaction from the individual
elastic constants and to derive an approximate estimate for the interparticle
friction coefficient.
article_number: '012301'
article_processing_charge: No
article_type: original
author:
- first_name: Tim
full_name: Still, Tim
last_name: Still
- first_name: Carl Peter
full_name: Goodrich, Carl Peter
id: EB352CD2-F68A-11E9-89C5-A432E6697425
last_name: Goodrich
orcid: 0000-0002-1307-5074
- first_name: Ke
full_name: Chen, Ke
last_name: Chen
- first_name: Peter J.
full_name: Yunker, Peter J.
last_name: Yunker
- first_name: Samuel
full_name: Schoenholz, Samuel
last_name: Schoenholz
- first_name: Andrea J.
full_name: Liu, Andrea J.
last_name: Liu
- first_name: A. G.
full_name: Yodh, A. G.
last_name: Yodh
citation:
ama: Still T, Goodrich CP, Chen K, et al. Phonon dispersion and elastic moduli of
two-dimensional disordered colloidal packings of soft particles with frictional
interactions. Physical Review E. 2014;89(1). doi:10.1103/physreve.89.012301
apa: Still, T., Goodrich, C. P., Chen, K., Yunker, P. J., Schoenholz, S., Liu, A.
J., & Yodh, A. G. (2014). Phonon dispersion and elastic moduli of two-dimensional
disordered colloidal packings of soft particles with frictional interactions.
Physical Review E. American Physical Society. https://doi.org/10.1103/physreve.89.012301
chicago: Still, Tim, Carl Peter Goodrich, Ke Chen, Peter J. Yunker, Samuel Schoenholz,
Andrea J. Liu, and A. G. Yodh. “Phonon Dispersion and Elastic Moduli of Two-Dimensional
Disordered Colloidal Packings of Soft Particles with Frictional Interactions.”
Physical Review E. American Physical Society, 2014. https://doi.org/10.1103/physreve.89.012301.
ieee: T. Still et al., “Phonon dispersion and elastic moduli of two-dimensional
disordered colloidal packings of soft particles with frictional interactions,”
Physical Review E, vol. 89, no. 1. American Physical Society, 2014.
ista: Still T, Goodrich CP, Chen K, Yunker PJ, Schoenholz S, Liu AJ, Yodh AG. 2014.
Phonon dispersion and elastic moduli of two-dimensional disordered colloidal packings
of soft particles with frictional interactions. Physical Review E. 89(1), 012301.
mla: Still, Tim, et al. “Phonon Dispersion and Elastic Moduli of Two-Dimensional
Disordered Colloidal Packings of Soft Particles with Frictional Interactions.”
Physical Review E, vol. 89, no. 1, 012301, American Physical Society, 2014,
doi:10.1103/physreve.89.012301.
short: T. Still, C.P. Goodrich, K. Chen, P.J. Yunker, S. Schoenholz, A.J. Liu, A.G.
Yodh, Physical Review E 89 (2014).
date_created: 2020-04-30T11:43:02Z
date_published: 2014-01-03T00:00:00Z
date_updated: 2021-01-12T08:15:26Z
day: '03'
doi: 10.1103/physreve.89.012301
extern: '1'
intvolume: ' 89'
issue: '1'
language:
- iso: eng
month: '01'
oa_version: None
publication: Physical Review E
publication_identifier:
issn:
- 1539-3755
- 1550-2376
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
status: public
title: Phonon dispersion and elastic moduli of two-dimensional disordered colloidal
packings of soft particles with frictional interactions
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 89
year: '2014'
...