Premium
Optimal fabrication methods for miniature coplanar ion traps
Author(s) -
Decker Trevor K.,
Tian Yuan,
McClellan Joshua S.,
Bennett Linsey,
Lammert Stephen A.,
Austin Daniel E.,
Hawkins Aaron R.
Publication year - 2018
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.8028
Subject(s) - miniaturization , ion trap , mass spectrometry , chemistry , microfabrication , quadrupole ion trap , ion , planar , secondary ion mass spectrometry , fabrication , analytical chemistry (journal) , substrate (aquarium) , optoelectronics , nanotechnology , materials science , computer graphics (images) , medicine , alternative medicine , organic chemistry , oceanography , chromatography , pathology , geology , computer science
Rationale Ion trap mass spectrometers are beneficial due to their intrinsic sensitivity and specificity. Therefore, a portable version for in situ analysis of various compounds is very attractive. Miniaturization of ion traps is paramount for the portability of such mass spectrometers. Methods We developed an optimized design for a planar linear ion trap mass spectrometer, consisting of two trapping plates with photolithographically patterned electrodes. Each plate is constructed using a machined glass substrate and standard microfabrication procedures. The plates are attached to a patterned circuit board via wire bonds then positioned approximately 5 mm apart. Results Trapped ions are detected by ejecting them through tapered slits, which alleviate charge buildup. Mass analysis can be performed through either boundary or resonant ion ejection. Better than unit mass resolution is demonstrated with resonant ejection. Conclusions The optimized planar linear ion trap provides good resolution and the potential for further miniaturization. This was accomplished by vigorously testing variables associated with ion trap design including electrical connections, substrate materials, and electrode designs.