to obtain $\eta_r$ for our samples. The value of [$c_p^{\text{free}}$]{}in each sample was estimated from $c_p$, $\phi$ and $\xi$ using an approximate expression based on scaled-particle theory [@cptheory].

The rate of dynamical decay at wave vector $q$ depends on the length scale being probed; in dilute systems it scales as $q^2$. Thus, in order to compare the dynamics of different samples at different wave vectors, and to highlight the effects of the attraction, we scaled the delay time variable of the DSFs by the relative viscosity $\eta_r$ and the dimensionless wave vector $(qR)^2$, so that DSF is presented as a function of the ‘scaled time’ $(qR)^2\tau/\eta_r$. Note that for the lowest $q$ studied, the scaled time is very close to the real time, while at the highest $q$, it is increased by about an order of magnitude.

We found aging [@generalAging] in all non-crystallizing samples. The dynamics slowed down with the ‘waiting time’ — the time interval between the cessation of tumbling and the beginning of measurements, Fig. \[fig:aging\]. It is known that the hard-sphere glass ages [@HSaging]. We found that the rate of aging in different glasses were different and that its effects were complex. Repulsive glasses aged only 