>> A MEMS Micro Gas Chromatograph

The determination of complex mixtures of toxic gases and vapors remains a challenging analytical problem of critical importance in human exposure assessments, industrial emission monitoring, biomedical surveillance and diagnosis, and homeland security. To address this problem, we are developing a wireless MEMS micro-GC (uGC) that includes a sample inlet with particulate filter, passive calibration-vapor.. >> more

>> Designed Materials for an Integrated Vapor Preconcentrator

This project seeks to specify the optimal quantities and types of high-surface-area adsorbent materials for the u-preconcentrator/focuser (uPCF) module of the WIMS uGC, and to define the optimal operating conditions for the uPCF.

>> Microscale Integrated Sampler-Injector (MISI) for a microGC

The goals of this project are to design, fabricate, and evaluate the performance of a prototype MISI, assess performance relative to theoretical models of diffusional transport and adsorbent capacity for vapors commonly found as contaminants in indoor working environments, and interface the sampler with an array of microsensors to determine the feasibility of incorporating the MISI into a microanalytical.. >> more

>> Representative Publications