  Dendrimers are characterized by special features that make them promising
candidates for many applications. Here we focus on two such applications:
dendrimers as light harvesting antennae, and dendrimers as molecular
amplifiers, which may serve as novel platforms for drug delivery. Both
applications stem from the unique structure of dendrimers. We present a
theoretical framework based on the master equation within which we describe
these applications. The quantities of interest are the first passage time (FPT)
probability density function (PDF), and its moments. We examine how the FPT PDF
and its characteristics depend on the geometric and energetic structures of the
dendrimeric system. In particular, we investigate the dependence of the FPT
properties on the number of generations (dendrimer size), and the system bias.
We present analytical expressions for the FPT PDF for very efficient
dendrimeric antennae and for dendrimeric amplifiers. For these cases the mean
first passage time scales linearly with the system length, and fluctuations
around the mean first passage time are negligible for large systems.
Relationships of the FPT to light harvesting process for other types of
system-bias are discussed.
