Journal ArticleProbing Gap Plasmons Down to Subnanometer Scales Using Collapsible NanofingersSong, Boxiang; Yao, Yuhan; Groenewald, Roelof E.; Wang, Yunxiang; Liu, He; Wang, Yifei; Li, Yuanrui; Liu, Fanxin; Cronin, Stephen B.; Schwartzberg, Adam M.; Cabrini, Stefano; Haas, Stephan; Wu, Wei2017-06-1410026135ACS Nano1936-0851https://doi.org/10.1021/acsnano.7b014681635612National Science Foundation