Shon, Yoon; Lee, Seungwoong; Park, Chang-soo; Lee, Sejoon; Jeon, Hee Change; Kim, Deukyoung; Kang, Taewon Wang; Yoon, Chong Seung; Kim, Eun Kyu; Lee, Jeoung Ju
ArticleIssue Date2007CitationApplied Surface Science, v.254, no.2, pp 494 - 498PublisherElsevier BV