▁elect rop or ated ▁skin . ▁ ▁App lications ▁ ▁A ▁large ▁area ▁of ▁interest ▁in ▁nan om edic ine ▁is ▁the ▁trans der mal ▁patch ▁because ▁of ▁the ▁possibility ▁of ▁a ▁pain less ▁application ▁of ▁th era pe ut ic ▁agents ▁with ▁very ▁few ▁side ▁effects . ▁Trans der mal ▁patch es ▁have ▁been ▁limited ▁to ▁admin ister ▁a ▁small ▁number ▁of ▁dru gs , ▁such ▁as ▁nic ot ine , ▁because ▁of ▁the ▁limitations ▁in ▁per me ability ▁of ▁the ▁skin . ▁Development ▁of ▁techniques ▁that ▁increase ▁skin ▁per me ability ▁has ▁led ▁to ▁more ▁dru gs ▁that ▁can ▁be ▁applied ▁via ▁trans der mal ▁patch es ▁and ▁more ▁options ▁for ▁patients . ▁ ▁In cre asing ▁the ▁per me ability ▁of ▁skin ▁allows ▁nan op articles ▁to ▁pen et rate ▁and ▁target ▁cancer ▁cells . ▁Nan op articles ▁along ▁with ▁multi - modal ▁imag ing ▁techniques ▁have ▁been ▁used ▁as ▁a ▁way ▁to ▁diagn ose ▁cancer ▁non - in vas ively . ▁Sk in ▁with ▁high ▁per me ability ▁allowed ▁quantum ▁d ots ▁with ▁an ▁ant ib ody ▁attached ▁to ▁the ▁surface ▁for ▁active ▁target ing ▁to ▁successfully ▁pen et rate ▁and ▁identify ▁cancer ous ▁tum ors ▁in ▁m ice . ▁T um or ▁target ing ▁is ▁benef icial ▁because ▁the ▁particles ▁can ▁be ▁excited ▁using ▁flu ores c ence ▁micro sc opy ▁and ▁emit ▁light ▁energy ▁and ▁heat ▁that ▁will ▁destroy ▁cancer ▁cells . ▁ ▁Sun block ▁and ▁sun screen ▁Sun block ▁and ▁sun screen ▁are ▁different ▁important ▁skin