Opened 8 years ago

Closed 8 years ago

#300 closed enhancement (fixed)

Vary vbar with Constant f/f0

Reported by: rcarney Owned by: gegorbet
Priority: normal Milestone: future
Component: ultrascan3 Version:
Keywords: review Cc:

Description

I would recommend changing the allowed limits of vbar in the 2DSA fitting controls paramater boxes.
Typically we are dealing with gold nanoparticles, which can range from almost all organic ligand shell at a density of ~1.2, therefore an upper limit of 1.5 (as currently implemented in the latest Mac release) is acceptable, but the upper limit can approach the density of pure gold, 19.32 g/mL, or a vbar of 0.05. Average values are normally greater than the current allowed minimum density of 10 g/mL (vbar =0.1). I propose a lower limit of even vbar = 0.025 mL/g (one can imagine NPs of a different metal even more dense than gold...).

Change History (2)

comment:1 Changed 8 years ago by gegorbet

  • Keywords review added
  • Owner changed from bdubbs to gegorbet
  • Status changed from new to assigned

A committed and built version of 2DSA now has a vbar lower limit of 0.05. This is review-ready.

I only just now noticed that Randy suggested 0.025. That lower limit will make it to the next revision.

comment:2 Changed 8 years ago by dzollars

  • Resolution set to fixed
  • Status changed from assigned to closed
Note: See TracTickets for help on using tickets.