Group news

(GG=Greener Group!)

Congratulations to Francois for his sucessful defense of his Ph.D. thesis "Méthodes spectroscopiques et optiques pour le suivi de la croissance des biofilms en milieu microfluidique"!

Mehran and Pouyan have their paper "Microstructured anodes by surface wrinkling for studies of direct electron transfer biofilms in microbial fuel cells" accepted to Advanced Materials Interfaces!

Mohammad Pousti has his paper "Altered biofilm formation at a plasma bonded attenuated total reflection element in a microfluidic flow cell" accepted to Surface Science!

Congratulations to 2018 summer intern Kimberly Côté-Vertefeuille for being awarded a bursary from to study the chemical and mechanical properties of bacterial biofilms.

Congratulations to Farnaz for her Biomicrofluidics paper on the effects of bubbles on biofilm development and the successful completion of her masters thesis!

Congratulations to Pouyan and François for their 2017 paper in Langmuir on hydrodynamic effect on biofilm anchoring surface. The article has been selected for the Langmuir Journal Club.

GG welcomes Tianyang (Dirk) Deng, Mohammad Tanver Rahman and CSC supported student Lingling Gong!

Congratulations to Mazeyar and Pouyan on their 2016 paper in Biomicrofluidics on biofilm mechanical properties.

Past and present GG members Mohammad and Safdar team up with FlowJEM for a new 2016 paper in Sensors on a new microfluidic fabrication method.

Francois, Mazeyar and Julien's 2016 paper is accepted to Lab on a Chip on a real-time measurements of biofilm viscosity. Did we just discover a new biofilm growth phase?

Congratulations to Adnane for his 2016 paper in Sensors on plug and play lab-on-a-chip. 

Congratulations to Mazeyar for his 2016 paper in Lab on a Chip on pH imaging of biofilms in microchannels. 

Congratulations to Adnane, Arnaud and Mehran for their 2016 paper in Lab on a chip on a new "electrochemical imaging in microfluidics".

Congratulations to Mazeyar and Julien for their 2015 paper in Biomicrofliuidics: "Live-streaming: Time-lapse video evidence of novel streamer formation mechanism and varying viscosity"

GG preparing 5 lectures at the 2015 CSC conference in Ottawa.

GG welcomes Arnaud Reitz (Master's student from France) and Sabrina Farch (doctoral student from Algeria) to our group for an internship. Good luck!

GG welcomes new PhD student Muhammad Pousti who will be developing spectral imaging by ATR-FTIR to study biocatalysis of new biomaterials.

Congratulations to former Master's student, Nahid Babaei for getting a job with Endoceutics in Québec!

In situ vibrational spectroscopy for microfluidcis

Specially designed microfluidic devices are used to interface with a state-of-the-art confocal Raman instrument to study biofilms, cells and their liquid environments. Our microfluidic reactors include nano-structured metal surfaces for sensitive surface enhanced Raman measurements down to μM concentrations. We also make extensive use of ATR-FTIR for in-situ spectral analysis inside microchannels.

Selected publications:

F. Paquet-Mercier, N. Babaei Aznaveh, M. Safdar, J Greener, "A microfluidic bioreactor with in situ SERS imaging for the study of controlled flow patterns of biofilm precursor materials," Sensors 2013, 13(11), 14714-14727 (Open access).

François Paquet-Mercier and Jesse Greener, "Spectral Imaging at the Microscale and Beyond", Sensors, 2014, 14(5), 8162-8166 (Open access).

J. Greener, E. Tumarkin, M. Debono, C-H. Kwan, M. Abolhasani, A. Günther, E. Kumacheva, “Development and applications of a microfluidic reactor with multiple reconfigurable probes”, Analyst, 2012, 137, 444 - 450.

J. Greener, B. Abbasi and E. Kumacheva, “Attenuated total reflection Fourier transform infrared spectroscopy for on-chip monitoring of solute concentrations,” Lab Chip, 2010, 10, 1561-1566.

Introducing an electrochemical microscope for microfluidics

Electrochemistry is developed as a new chemical imaging modality for microfluidics. The technique is based on multipoint voltammetry using an embedded 20x10 minature electrode array implemented on a customized printed circuit board.

Selected publications:

A. Kara, A. Reitz, J. Mathault, S. Mehou-Loko, M.A. Amirdehi, A. Miled, J. Greener, "Electrochemical imaging for microfluidics: a full-system approach," Lab Chip, 2016, DOI: 10.1039/C6LC00077K.

pH imaging

As one of the most fundamental physiochemical properties, extracellular pH has a profound effect on the activity of enzymes and microorganisms, the efficacy of enzyme inhibitors, molecular solubility, molecular uptake by cells and a range of other biological and pharmaceutical applications. Dental biofilms cause local acidification which result in cavities. The performance of electroactive biofilms in microbial fuel cells is self-limiting due to local acidification at the electrode. We are exploiting new advances in metal enhanced fluorescence, and voltammetry to make in situ pH measurements at the biofilm attachment surface.

Selected publications:

- M. Parvinzadeh Gashti,   J. Asselin,   J. Barbeau,   D. Boudreau, J. Greener,  A microfluidic platform with pH imaging for chemical and hydrodynamic stimulation of intact oral biofilms, Lab Chip, 2016, DOI: 10.1039/C5LC01540E