Phil Denby

5 Questions 147 Answers 0 Followers

Questions related from Phil Denby

Can the Surface Plasmon Resonance be "turned off" by application of an external polarising field?

Surface Plasmon Resonance (SPR) - in a nano-particle for example, is caused by the collective oscillation of the conduction electrons, causing a distinct optical absorption. If such a particle is...

28 April 2022 7,262 4 View

Can anyone recomend a "surplus" lab equipment sales company for our thin-film PVD system?

We are scaling down our thin film R&D projects, and are looking to sell off / find a good home for our Thin-film & Nanoparticle Physical Vapour Deposition system. I was wondering if...

17 September 2020 6,785 3 View

How to control a piezoelectric stack?

Is it possible to drive a piezoelectric stack with just DC.. ie. if you want to use a piezo to move something a set distance can you just apply a constant voltage to keep the piezo "activated"...

24 November 2017 3,890 3 View

Einzel lens focused electron source simulated in SIMION. Any practical tips for designing a simple beam focusing system?

Can anyone offer practical tips on designing a simple einzel lens system for focusing an electron beam e.g. from a hair-pin tungsten filament. I have played with a simple extractor and lens...

11 October 2017 3,798 1 View

How does RF sputtering work.. why sputter the "target"?

I wonder if someone could explain why, in RF sputtering the target material is preferentially sputtered! I understand how sputtering works, but with an AC electric field I cant quite grasp why...

07 April 2017 2,045 4 View