Tuesday, January 17, 2023

Thermal Atomic Layer Deposition of Gold

Summary: We successfully developed the first reductive thermal ALD process for elemental gold using AuCl(PEt3) and (Me3Ge)2DHP as precursors. Highly conductive and pure gold films could be deposited at moderate temperatures of 160–180 °C. The process was proven to work on multiple substrates, although with a clear difference in nucleation that was the most favorable on a Ru surface and the least favorable on Al2O3. Furthermore, the reaction mechanism was studied and found to proceed stepwise, as expected based on the literature. The combination of high growth rate and purity of the films shows potential for many applications and furthermore proves the capabilities of the recently discovered reducing agent, (Me3Ge)2DHP.

Reductive Thermal Atomic Layer Deposition Process for Gold

Anton Vihervaara, Timo Hatanpää, Heta-Elisa Nieminen, Kenichiro Mizohata, Mykhailo Chundak, Mikko Ritala*
ACS Mater. Au 2023, XXXX, XXX, XXX-XXX
Publication Date:January 11, 2023
https://doi.org/10.1021/acsmaterialsau.2c00075


In this work, we developed an atomic layer deposition (ALD) process for gold metal thin films from chloro(triethylphosphine)gold(I) [AuCl(PEt3)] and 1,4-bis(trimethylgermyl)-1,4-dihydropyrazine [(Me3Ge)2DHP]. High purity gold films were deposited on different substrate materials at 180 °C for the first time with thermal reductive ALD. The growth rate is 1.7 Å/cycle after the film reaches full coverage. The films have a very low resistivity close to the bulk value, and a minimal amount of impurities could be detected. The reaction mechanism of the process is studied in situ with a quartz crystal microbalance and a quadrupole mass spectrometer.

1 comment:

  1. Today is the happiest day of my life, because problems I have been battling
    with over the years are now solved. My wife almost left me because she was
    unable to put in (pregnant) as result of my weak erection and premature
    ejaculation, I looked everywhere for a solution all to no avail, I have
    even been scammed severally before I met a Man called dr Austin who put an
    End the problem. If you are having erectile dysfunction contact him with this email draustinenlargementhome@gmail.com
    whatApps him through +2347061508037.
    he also specialize on the following things
    PENILE/PENIS ENLARGEMENT
    Gustatory Cure
    Diabetes Cure
    GENERAL BODY Herpes cure
    Thanks for the Enlarging my penis sir, you indeed save my marriage...I am really grateful sir,

    ReplyDelete