Andrew Burris

7 Questions 9 Answers 0 Followers

Questions related from Andrew Burris

What is the ideal apparatus for testing chemiresistor gas sensors?

Currently, I am using a static setup, which consists of a large glass jar with an electric fan at the bottom (for air circulation) and liquid volatile samples are injected through a septum in the...

03 March 2016 1,507 2 View

Why does my chemiresistor IV curve not pass through the origin?

I'm working with chemiresistors, sourcing V and measuring I. For some of my sensors, I'm getting an IV curve that is linear, but does not pass through the origin. The plot shows a small positive...

07 July 2015 5,843 10 View

How do I prevent precipitation of Ti isopropoxide (TTIP) in DMF?

I'm trying to make an electrospinning sol-gel per a literature procedure, but the TTIP is precipitating to TiO2. In short, I am dissolving polyacrylonitrile into DMF at 80ºC, followed by dropwise...

05 May 2015 3,055 0 View

What is the optimal method for attaching SiO2 nanoparticles to cellulose acetate fibers?

Since both surfaces are negatively charged, I'm planning on adding a positively charged layer using either APTES ((3-Aminopropyl)triethoxysilane) or PAH (poly(allylamine hydrochloride)). Any...

03 March 2015 1,121 2 View

Is it possible to model metal-enhanced fluorescence with FDTD freeware such as MEEP, B-CALM, or OptiFDTD?

I'm looking to model MEF using free FDTD software. Can this be done, and is it simple enough for a non-programmer to follow?

01 January 2015 9,566 2 View

How do I measure specific capacitance of a PANi/CB composite microfiber?

I have fabricated polyethylene oxide (PEO) nanofibers doped with HCSA-polyaniline and carbon black. Interestingly, when I source more than 3-4 V through the as-spun fiber mat, an irreversible...

12 December 2014 7,573 4 View

Why do some fluorophores have a shoulder peak in their emission spectra?

I know that fluorescence emission is typically the mirror image of absorbance, but why? Specifically, I'm looking at the emission spectrum for polydiacetylene.

07 July 2014 5,938 8 View