Palm muting applied to single notes will create a percussive popping sound. You can use the side of your right hand like before, however you will more often use the heel of your hand for single notes. This will put your right hand at less of an angle and will make successive down and up picking more smooth.
Here is a video of my right hand as I play a single note line
incorporating palm muting.
Page 1, Palm muting chords
