Provided are functional segregated telodendrimers having, for example, two or three functional segments. The telodendrimers can have one or more crosslinking groups (e.g., reversible photocrosslinking groups). The telodendrimers can aggregate to form nanocarriers. Cargo such as drugs, imaging probes, and other materials may be sequestered in the core of the aggregates via non-covalent or covalent interactions with the telodendrimers. Such nanocarriers may be used in drug delivery applications and imaging applications.