David Coathup

13 Questions 11 Answers 0 Followers

Questions related from David Coathup

What causes shifts in Raman peaks?

I am currently utilising Raman spectroscopy for the first time, and am struggling to identify some peaks.I understand that Raman peaks are due to the inelastic scattering of light, whose...

09 September 2017 488 4 View

Why is BTO commonly (117) in orientation on most substrates?

In most literature, I have read on Bi4Ti3O12 thin films, the presented XRD is commonly have very intense (117) orientated peaks. I understand that if I film have no matching lattice dimensions...

07 July 2017 2,869 1 View

How to explain MOS behaviors in a metal-ferroelectric-semiconductor structure?

I am looking at explaining undesirable MOS behaviors in a metal-ferroelectric-structure. I recently tried characterizing the capacitance-voltage behavior of a Bi4Ti3O12/P-Si junction, using a...

03 March 2017 6,038 1 View

How do I explain the Metallic and insulative behaviors of ZnO thin films depending on annealing atmospheres?

I have found that ZnO thin films show either metallic or insulate behaviours when annealed at 700OC in vacuum and ambient atmospheres respectively, and am looking for help explaining this...

01 January 2017 1,415 3 View

What is the best method for determining strain in thin films using XRD?

I am looking at determining the strain in Bi4Ti3O12 thin films on Si/Ti/Pt substrates using novel doping. I deposited the thin film using a d RF magnetron sputtering, and producing a non-doped...

12 December 2016 2,702 9 View

How to best increase the ferromagnetic moment of BTO Thin films?

I have recently performed Ferromagnetic measurements of doped BTO thin films. (see attached). My sample shows Ferromagnetic behaviors between the ranges of +-1.5KOe(red), with the substrates...

10 October 2016 992 1 View

How can I get electrical contact on N-Si substrates annealed in atmosphere?

I am looking at forming MOS devices using Bi4Ti3O12 thin films on silicon substrates deposited by magnetron sputtering. In the literature, they achieve this by using standard RF-magnetron...

10 October 2016 8,857 5 View

What materials can I use for HF etch resist?

I am looking at performing SiO2 etching off of silicon. My substrates have a Bi4Ti3O12 thin films on them which I wish to avoid damaging, so I intend to cover them in HF etching resist.I have...

10 October 2016 9,521 5 View

How to best present XRD data for publication?

I am looking for help with presenting XRD data for publication.I have two main queries, first is how to accurately identify peaks, and second refers to choosing which peaks to label and discuss,...

10 October 2016 8,955 5 View

Where can I find the dielectric constant of BTO thin films when annealed in vacuum?

I am looking at the integration of Bi4Ti3O12 thin films on Ultrananocrystaline diamond (UNCD) substrates. I deposit my thin films using RF-Sputtering, but am unable to do in-situ substrate...

09 September 2016 804 2 View

How to calculate thin film mass?

I am looking at performing SQUID-VSM of doped-BTO thin films(400nm) on platinum substrates. With known thickness, width and length values, allowing me to calculate the volume, and from that, the...

09 September 2016 5,484 6 View

What can cause roughening of platinised substrates at low film thickness levels?

I am investigating the multiferroic properties of doped Bi4Ti3O12 thin films on platinum coated silicon substrates. As part of my investigation, I am looking at minimising the film thickness. One...

07 July 2016 7,914 4 View

What are some easy to use insulators for integration with ultrananocrystalline diamond films?

I have been asked to support an intern with the development of a ultrananocrystaline thin film MOS device. We have some already developed ultrananocrystaline thin films of Si-substrates, but i...

06 June 2016 1,491 3 View