n-Nonadecane embedded in mesopores

摘要：

The ordering of n-nonadecane confined in the pores of MCM-41 silica was investigated by Positron Annihilation Lifetime Spectroscopy. No irradiation effects caused by the positron source were observed. The ortho-positronium components found in the lifetime spectra correspond to the free volumes observed in the bulk alkane plus additional space at the interface between n-nonadecane and the silica wall. Phase transitions rigid-rotator and rotator-liquid were shifted towards lower temperatures by 28 and 16 degrees respectively.

关键词： n-alkanes mesopores phase transitions nanostructures positronium

作者: Rados(I)w Zaleski Jacek Goworek

作者单位: Institute of Physics,Maria Curie-Sklodowska University,pl.Marii Curie-Sklodowskiej 1,20-031 Lublin,P Faculty of Chemistry,Maria Curie-Sklodowska University,pl.Marii Curie-Sklodowskiej 3,20-031 Lublin,P

会议类型: 国际会议

会议名称: 第九届国际正电子与正电子素国际会议(9th International Workshop on Positron and Positronium Chemistry)(PPC–9)

会议地点: 武汉

会议语种:英文

页码: 180-182

在线出版日期: 2008-05-11（万方平台首次上网日期，不代表论文的发表时间）