A single light spot GC detector employing localized surface plasmon resonance of porous Au@SiO nanoparticle multilayer.

This paper describes the synthesis of a nano-porous multilayered film consisting of Au@SiO nanoparticles. This film was used to miniaturize the size of a localized surface plasmon resonance (LSPR)-based capillary gas chromatograph (GC) detector. A layer-by-layer (LbL) approach with proper surface reaction sequences was used to create a multilayer structure that consisted of as many as five layers of Au@SiO nanoparticles.

Novel gas chromatographic detector utilizing the localized surface plasmon resonance of a gold nanoparticle monolayer inside a glass capillary.

This paper presents the design, assembly, and evaluation of a novel gas chromatographic detector intended to measure the absorbance of the localized surface plasmon resonance (LSPR) of a gold nanoparticle monolayer in response to eluted samples from a capillary column. Gold nanoparticles were chemically immobilized on the inner wall of a glass capillary (i.d.

Measuring real-time concentration trends of individual VOC in an elementary school using a sub-ppb detection μGC and a single GC-MS analysis.

This paper reports the results from a field study that used a micro gas chromatograph (μGC) in conjunction with single gas chromatography-mass spectrometry (GC-MS) analysis to obtain the time-dependent concentration changes of individual volatile organic compounds (VOCs). The μGC is capable of performing sub-ppb analysis every 15min and has a total weight of only 3kg, which includes an embedded tablet computer. The field study was conducted in an elementary school near a chemical industrial area.

A multidimensional micro gas chromatograph employing a parallel separation multi-column chip and stop-flow μGC × μGCs configuration.

A dual-chip, multidimensional micro gas chromatographic module was designed, built and evaluated. Column chips were fabricated on a silicon wafer with an etched rectangular channel 100 μm (width) × 250 μm (depth) using a deep reactive ion etching (DRIE) process. The column chip for the first GC dimension was 3 m long and was coated with polydimethylsiloxane (DB-1) as the stationary phase.

A micro GC detector array based on chemiresistors employing various surface functionalized monolayer-protected gold nanoparticles.

Aspects of the design, fabrication, and characterization of a chemiresistor type of microdetector for use in conjunction with gas chromatograph are described. The detector was manufactured on silicon chips using microelectromechanical systems (MEMS) technology. Detection was based on measuring changes in resistance across a film comprised of monolayer-protected gold nanoclusters (MPCs).