41 resultados para pH Electrode
em Cambridge University Engineering Department Publications Database
Resumo:
We describe developments in the integration of analyte specific holographic sensors into PDMS-based microfluidic devices for the purpose of continuous, low-impact monitoring of extra-cellular change in micro-bioreactors. Holographic sensors respond to analyte concentration via volume change, which makes their reduction in size and integration into spatially confined fluidics difficult. Through design and process modification many of these constraints have been addressed, and a microfluidics-based device capable of real-time monitoring of the pH change caused by Lactobacillus casei fermentation is presented as a general proof-of-concept for a wide array of possible devices.
Resumo:
Using single-walled nanotubes as an example, we fabricated transparent conductive coatings and demonstrated a new technique of centrifuge coating as a potential low-waste, solution-based batch process for the fabrication of nanostructured coatings. A theoretical model is developed to account for the sheet resistance exhibited by layered random-network coatings such as nanofilaments and graphene. The model equation is analytical and compact, and allows the correlation of very different scaling regimes reported in the literature to the underlying coating microstructure. Finally, we also show a refined experimental setup to systematically measure the curvature-dependent sheet resistance.
Radio over free space optical link using a directly modulated two-electrode high power tapered laser
Integration of holographic sensors into microfluidics for the real-time pH sensing of L Casei growth
Gigabit/s modulation of twin-electrode high-brightness tapered laser with high modulation efficiency
Optimisation of pH and solvent strength in HPLC bioanalysis using a multivariate optimisation system