Tip-enhanced laser ablation sample transfer for biomolecule mass spectrometry.
Tip-enhanced laser ablation sample transfer for biomolecule mass spectrometry.
复制标题
DOI:
10.1007/s13361-014-1005-x
复制
发表时间:
2015-01
影响因子:
3.2
通讯作者:
Murray, Kermit K.
中科院分区:
文献类型:
--
作者:
Ghorai, Suman;Seneviratne, Chinthaka A.;Murray, Kermit K.
Atomic force microscope (AFM) tip enhanced laser ablation was used to transfer molecules from thin films to a suspended silver wire for off-line mass spectrometry using laser desorption ionization (LDI) and matrix-assisted laser desorption ionization (MALDI). An AFM with a 30 nm radius gold-coated silicon tip was used to image the sample and to hold the tip 15 nm from the surface for material removal using a 355 nm Nd:YAG laser. The ablated material was captured on a silver wire that was held 300 μ m vertically and 100 μm horizontally from the tip. For the small molecules anthracene and rhodamine 6G, the wire was cut and affixed to a metal target using double-sided conductive tape and analyzed by LDI using a commercial laser desorption time-of-flight mass spectrometer. Approximately 100 fg of material was ablated from each of the 1 μ m ablation spots and transferred with approximately 3% efficiency. For larger polypeptide molecules angiotensin II and bovine insulin, the captured material was dissolved in saturated matrix solution and deposited on a target for MALDI analysis.
登录
查看更多内容
影响因子:
7.4
作者:
Park, Sung-Gun;Murray, Kermit K.
通讯作者:
Murray, Kermit K.
影响因子:
3.7
作者:
Little, Mark W.;Laboy, Jorge;Murray, Kermit K.
通讯作者:
Murray, Kermit K.
影响因子:
4.9
作者:
Dill, Allison L.;Eberlin, Livia S.;Cooks, R. Graham
通讯作者:
Cooks, R. Graham
影响因子:
2
作者:
Perdian, D. C.;Cha, Sangwon;Lee, Young Jin
通讯作者:
Lee, Young Jin
影响因子:
2
作者:
Koestler, Martin;Kirsch, Dieter;Spengler, Bernhard
通讯作者:
Spengler, Bernhard