Flexible Drift Tube for High Resolution Ion Mobility
Spectrometry (Flex-DT-IMS)
Posted on 2020-06-16 - 17:04
This paper describes,
in detail, the development of a novel, low-cost,
and flexible drift tube (DT) along with an associated ion mobility
spectrometer system. The DT is constructed from a flexible printed
circuit board (PCB), with a bespoke “dog-leg” track
design, that can be rolled up for ease of assembly. This approach
incorporates a shielding layer, as part of the flexible PCB design,
and represents the minimum dimensional footprint conceivable for a
DT. The low thermal mass of the polyimide substrate and overlapping
electrodes, as afforded by the dog-leg design, allow for efficient
heat management and high field linearity within the tube–achieved
from a single PCB. This is further enhanced by a novel double-glazing
configuration which provides a simple and effective means for gas
management, minimizing thermal variation within the assembly. Herein,
we provide a full experimental characterization of the flexible DT
ion mobility spectrometer (Flex-DT-IMS) with corresponding electrodynamic
(Simion 8.1) and fluid dynamic (SolidWorks) simulations. The Flex-DT-IMS
is shown to have a resolution >80 and a detection limit of low
nanograms
for the analysis of common explosives (RDX, PETN, HMX, and TNT).
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Smith, Barry
L.; Boisdon, Cedric; Young, Iain S.; Praneenararat, Thanit; Vilaivan, Tirayut; Maher, Simon (2020). Flexible Drift Tube for High Resolution Ion Mobility
Spectrometry (Flex-DT-IMS). ACS Publications. Collection. https://doi.org/10.1021/acs.analchem.0c01357