Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
J Mass Spectrom. 2012 May;47(5):620-6. doi: 10.1002/jms.2994.
A new strategy was explored to generate pure gold cluster ions, Au(n)(+/-), from gold films deposited on solid substrates via a matrix-assisted laser ablation technique. The gold films deposited on SiO(2)-particle-assembled photonic crystals were demonstrated to be the most ideal compared with the films deposited on various glass slides. Dropped with a matrix of 2-(4-hydroxyphenylazo) benzoic acid and bombarded by nitrogen pulse laser (355 nm), they could release a series of Au(n)(+) with n more than 110 or Au(n)(-) with n more than 60 according to the data obtained by inline time-of-flight mass spectrometry. The gold-deposited photonic crystal substrates could be stored at room temperature for at least 6 months. The method is hence steady and convenient in use.
通过基质辅助激光烧蚀技术在固体基底上沉积金膜，探索了一种产生纯金团簇离子 Au(n)(+/−)的新策略。与沉积在各种玻片上的薄膜相比，沉积在 SiO2-颗粒组装光子晶体上的金膜被证明是最理想的。滴加 2-（4-羟基偶氮）苯甲酸基质并用氮脉冲激光（355nm）轰击，根据在线飞行时间质谱获得的数据，它们可以释放出一系列 Au(n)(+)，其中 n 大于 110，或 Au(n)(-)，其中 n 大于 60。沉积金的光子晶体衬底可以在室温下至少储存 6 个月。因此，该方法稳定且使用方便。
