▁her ▁investig ations ▁of ▁electronic ▁transport ▁in ▁g erman ium . ▁She ▁then ▁continued ▁to ▁execute ▁studies ▁in ▁the ▁areas ▁of ▁experimental ▁cond ensed ▁matter ▁physics , ▁however ▁switched ▁focus ▁and ▁expanded ▁in ▁divers ity ▁with ▁respect ▁to ▁her ▁choice ▁of ▁experimental ▁system . ▁Her ▁post - grad uate ▁research ▁topics ▁included ▁contributions ▁to ▁the ▁study ▁of ▁complex ▁heter ost ruct ures ▁and ▁interfaces ▁with ▁a ▁focus ▁on ▁the ▁study ▁of ▁ 2 D ▁electron ▁g ases . ▁ ▁Ar ound ▁ 2 0 0 8 , ▁G w inn ▁switched ▁the ▁focus ▁of ▁her ▁research ▁to ▁the ▁study ▁and ▁prepar ation ▁of ▁solution - phase ▁col lo idal ▁n anos ystem s ▁in ▁a que ous ▁environments ▁and ▁pass iv ated ▁by ▁bi om ole cules . ▁This ▁was ▁also ▁a ▁particularly ▁dr astic ▁shift ▁with ▁respect ▁to ▁the ▁nature ▁of ▁her ▁experiment ▁which ▁became ▁pre domin antly ▁focused ▁in ▁spect ro sc opy ▁and ▁the ▁study ▁of ▁optical ▁phen omena ▁in ▁n anos ystem s . ▁Despite ▁the ▁seem ingly ▁significant ▁shift ▁in ▁her ▁main ▁research ▁area ▁and ▁nature ▁of ▁her ▁measurement , ▁G w inn ' s ▁work ▁has ▁continued ▁to ▁be ▁distinguished ▁by ▁a ▁high ▁degree ▁of ▁innov ation ▁and ▁contributions ▁to ▁scientific ▁community . ▁She ▁is ▁an ▁expert ▁on ▁the ▁prepar ation ▁and ▁study ▁of ▁silver ▁nan oc l ust ers ▁and ▁phot oph ys ical ▁properties ▁there of . ▁In ▁this ▁space , ▁she ▁was ▁one ▁of ▁the ▁earliest ▁advoc ate ▁machine ▁learning ▁as ▁a ▁strategy ▁to