Micro preconcentrator with seedless electroplated gold as self-heating adsorbent

Alfeeli, Bassam; Zareian-Jahromi, M.A.; Agah, Masoud

doi:10.1109/icsens.2009.5398342

Cited by 7 publications

(4 citation statements)

References 17 publications

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“…The fabrication processes of the conventional microheaters are extremely complex and require multiple photomasks, such as those that define microfluidic channels, electrical interconnects and microheating elements with a high surface area [9]. A novel μPCT with selfheating adsorbents was presented recently [30]. Self-heating adsorbents are composed of porous gold layers, which serve as both adsorbents and heaters, and are formed at the substrate during seedless electroplating.…”

Section: Introductionmentioning

confidence: 99%

A novel micropreconcentrator employing a laminar flow patterned heater for micro gas chromatography

Tian¹,

Wu²,

Lu³

et al. 2012

J. Micromech. Microeng.

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A simple micromachined process based on one photomask is developed for a novel micropreconcentrator (μPCT) used in a micro gas chromatograph (μGC). Unique thick silver heating microstructures with a high surface area for microheater of μPCT are fabricated by combining the microfluidic laminar flow technique and the Tollens' reaction within a microchannel. Silver deposition using this laminar flow patterning technique provides a higher deposition rate and easier microfabrication compared to conventional micromachined technologies for thick metal microstructures (>200 μm). An amorphous and porous carbon film that functions as an adsorbent is grown on microheaters inside the microchannel. The μPCT can be heated to >300 • C rapidly by applying a constant electrical power of ∼1 W with a heating rate of 10 • C s −1 . Four volatile organic compounds, acetone, benzene, toluene and xylene, are collected through the proposed novel μPCTs and separated successfully using a 17 m long gas chromatography column. The peak widths at half height (PWHHs) of the four compounds are relatively narrow (<6 s), and the minimum PWHH of 3.75 s is obtained for acetone. The preconcentration factors are >38 000 for benzene and toluene.

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Section: Introductionmentioning

confidence: 99%

A novel micropreconcentrator employing a laminar flow patterned heater for micro gas chromatography

Tian¹,

Wu²,

Lu³

et al. 2012

J. Micromech. Microeng.

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show abstract

“…The coating is done either by spin coating [23], plasma deposition [40], inkjet printing [41], electroplating [42], or conventional methods used to coat chromatographic open tubular capillary columns [43]. However, thin films have limited adsorption capacity and may be susceptible to degradation related to low surface adhesion and/or thermal instability.…”

Section: A Available Microstructuresmentioning

confidence: 99%

Gas phase micro-preconcentrators for benzene monitoring: A review

Lahlou

Vilanova

Correig

2013

Sensors and Actuators B: Chemical

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“…The fabrication proce abovementioned microheaters are very require multiple photomasks such as l Micropreconcentrator for Micro Gas Chr heen 2 , T. -H. Wu 2, C. -J. Lu 3 [15]. micropreconcentrators mig adsorbent capacity and cou issues when sampling at applications.…”

Section: Introductionmentioning

confidence: 99%

Development of a novel micropreconcentrator for micro gas chromatography

Tian

Sheen

et al. 2011

2011 16th International Solid-State Sensors, Actuators and Microsystems Conference

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A novel micropreconcentrator u one-photomask micromachined proces Instead of using E-beam evaporation t wires for heaters of micropreconcentra reaction using microfluidic laminar flow utilized to deposit metal wires as micropreconcentrators. Metal deposit laminar flow patterning technique p deposition rate and easier microfabricati conventional micromachined technologie this laminar flow patterning for microh integrated adsorbent forming technique The aqueous carbohydrate, serving as filled into the micropreconcentrator and high temperature. The micropreconce heated up to 300 ℃ rapidly by apply electrical power of ~1 W and a heating Four volatile organic compounds, ac toluene and xylene, were collected thr micropreconcentrators and separated by chromatography column successfully. Th half height (PWHH) of these four compo narrow (<1.17s) and the minimum PWH obtained using acetone.

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Micro preconcentrator with seedless electroplated gold as self-heating adsorbent

Cited by 7 publications

References 17 publications

A novel micropreconcentrator employing a laminar flow patterned heater for micro gas chromatography

A novel micropreconcentrator employing a laminar flow patterned heater for micro gas chromatography

Gas phase micro-preconcentrators for benzene monitoring: A review

Development of a novel micropreconcentrator for micro gas chromatography

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