For fundamentals I prefer books over papers, because they are typically more thorough and a little bit more 'slow' in the introduction of concepts. There are many books that will cover, some of, the topics that you mention. I will mention below the 3 books that where most useful to me in the past.
1) An excellent resource for a theoretical foundation in capillarity and wetting is the book by de Gennes et al.:
P.G. de Gennes, F. Brochard-Wyart and D. Quéré, Capillarity And Wetting Phenomena - Drops, Bubbles, Pearls, Waves, 2003, Springer
Concepts like surface tension and energy, contact angles, contact angle hysteresis, spreading behavior of droplets and many more are dealt with in a way that is quite easy to grasp conceptually. If you actually want to understand the derivations you will find that the book tends to skip some steps in the process, which makes it a bit harder to follow, but it provides references that you can use to follow up on that.
2) For a more thorough background on the origin of surface tension you might be interested in the book by Israelachvili:
J.N. Israelachvili, Intermolecular and surface forces, 2011, Academic Press (Elsevier)
3) A third book that mostly focuses on the dynamics of capillary interfaces from a fairly mathematical perspective is the book by Shikhmurzaev
Y.D. Shikhmurzaev, Capillary flows with forming interfaces, 2008, CRC Press
For the latest information, books are typically not the best, because they might already be outdated by a couple of years when they are released. This is where review papers come in. They will still be more extensive then research papers, but are usually quite up to date, at least within a year or so. Additionally, more specific topics like the collision phenomena you are interested in might not be addressed (substantially) in books on capillarity. Below I have selected just a few review papers that you might find interesting to read, but I would advice you to also search for yourself in journals like Annual Review of Fluid Mechanics and Reports on Progress in Physics
1) Yarin et al.,Drop Impact Dynamics, 2006, Annual Review of Fluid Mechanics
2) Grabowski et al., Growth of Cloud Droplets in a Turbulent Environment, 2013, Annual Review of Fluid Mechanics