Data for Vivek, Kelleher, Chaikin, & Weeks, PNAS (2017)

Data from experiments studying 2D colloidal suspensions.

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Important note for all data sets: Some particles may not exist at all times, but the tracking program has identified them as likely the same particle and thus with a continuous identity. However, it is known that occasionally the tracking program makes mistakes with this.

Data from experiments studying dense 2D bidisperse colloidal suspensions

These data sets were studied in: "Long wavelength fluctuations and the glass transition in 2D and 3D"
S Vivek, CP Kelleher, PM Chaikin, & ER Weeks, Proc. Nat. Acad. Sci. 114, 1850-1855 (2017).
- Abstract / PDF / arXiv:1604.07338 / journal

The data are in the form (x,y,d,t,id) where d is the particle diameter. The units for (x,y,d) are microns. Time is an integer, with the time step for each given in the table (in other words, multiply the integer time by the time step to convert the time to seconds). Each particle has a unique ID number assigned to it (an integer). The samples are bidisperse. The tau_alpha reported in the tables below is the regular tau_alpha, which is what is used to plot data in Figs. 3 and 6 of our paper. See our paper for further details.

2D Hard particles data (taken by Skanda Vivek at Emory)

For these data, tau_alpha0 is 5.4 s (the value of tau_alpha from dilute data).

filename area fraction time step (s) tau_alpha (s) comments

t2_16_1b.zip 0.55 1 9.5 Black data of Fig. 2, 5a

t2_13_3b.zip 0.65 1 18

t2_S50_4b.zip 0.70 3.3 31

t2_10_19b.zip 0.74 6.6 135

t2_10_26b.zip 0.75 16.5 550 Red data of Fig. 2, 5a

t2_10_29b.zip 0.76 16.5 3000

t2_10_30b.zip 0.78 16.5 14000 Blue data of Fig. 2, 5a; data of Fig. 4(a)

t2_10_11b.zip 0.78 16.5 40000 Green data of Fig. 2, 5a

filename	area fraction	time step (s)	tau_alpha (s)	comments
t2_16_1b.zip	0.55	1	9.5	Black data of Fig. 2, 5a
t2_13_3b.zip	0.65	1	18
t2_S50_4b.zip	0.70	3.3	31
t2_10_19b.zip	0.74	6.6	135
t2_10_26b.zip	0.75	16.5	550	Red data of Fig. 2, 5a
t2_10_29b.zip	0.76	16.5	3000
t2_10_30b.zip	0.78	16.5	14000	Blue data of Fig. 2, 5a; data of Fig. 4(a)
t2_10_11b.zip	0.78	16.5	40000	Green data of Fig. 2, 5a

2D Soft particles data (taken by Colm Kelleher at NYU)

For these data, tau_alpha0 is 20 s (the value of tau_alpha from dilute data).

filename gamma time step (s) tau_alpha (s) comments

t2_apr19b.zip 58.61 2 27 Black data of Figs. 2 and 5B

t2_apr22b.zip 96.48 2 37

t2_apr25b.zip 98.19 2 47

t2_may7b.zip 140.05 2 146

t2_may8b.zip 178.30 2 360 Red data of Figs. 2 and 5B

t2_may23b.zip 305.32 2 3800 Blue data of Figs. 2 and 5B; data in Fig. 4

t2_may26b.zip 298.78 2 11000

t2_may20b.zip 458.04 2 27000 Green data of Figs. 2 and 5B

filename	gamma	time step (s)	tau_alpha (s)	comments
t2_apr19b.zip	58.61	2	27	Black data of Figs. 2 and 5B
t2_apr22b.zip	96.48	2	37
t2_apr25b.zip	98.19	2	47
t2_may7b.zip	140.05	2	146
t2_may8b.zip	178.30	2	360	Red data of Figs. 2 and 5B
t2_may23b.zip	305.32	2	3800	Blue data of Figs. 2 and 5B; data in Fig. 4
t2_may26b.zip	298.78	2	11000
t2_may20b.zip	458.04	2	27000	Green data of Figs. 2 and 5B

3D hard particles data

The 3D data used in Vivek et al., PNAS (2017) are from an earlier paper and are posted on the web here.