[동아일보] http://bizn.donga.com/it/home/3/all/20171020/86842462/2 [PHYSORG] https://phys.org/news/2017-10-insights-lightweight-material.html [HelloDD] http://hellodd.com/?md=news&mt=view&pid=62886 ​[TECHNOLOGYORG] https://www.technology.org/2017/10/16/penn-and-kist-researchers-offer-insights-into-lightweight-material-that-expands-with-heat/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+TechnologyOrg+%28Technology+Org+-+All+News%29