Detail publikace

Controlling the surface silanol density in capillary columns and planar silicon via the self-limiting, gas-phase deposition of tris(dimethylamino) methylsilane, and quantification of surface silanols after silanization by low energy ion scattering

Moeini, B. Pinder, JW. Avval, TG. Jacobsen, C. Brongersma, HH. Prusa, S. Bábik, P. Vanicková, E. Argyle, MD. Strohmeier, BR. Jones, B. Shollenberger, D. Bell, DS. Linford, MR.

Originální název

Controlling the surface silanol density in capillary columns and planar silicon via the self-limiting, gas-phase deposition of tris(dimethylamino) methylsilane, and quantification of surface silanols after silanization by low energy ion scattering

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Surface silanols (Si-OH) play a vital role on fused silica surfaces in chromatography. Here, we used an atmospheric-pressure, gas-phase reactor to modify the inner surface of a gas chromatography, fused silica capillary column (0.53 mm ID) with a small, reactive silane (tris(dimethylamino)methylsilane, TDMAMS). The deposition of TDMAMS on planar witness samples around the capillary was confirmed with X-ray photoelectron spectroscopy (XPS), ex situ spectroscopic ellipsometry (SE), and wetting. The number of surface silanols on unmodified and TDMAMS-modified native oxide-terminated silicon were quantified by tagging with dime-thylzinc (DMZ) via atomic layer deposition (ALD) and counting the resulting zinc atoms with high sensitivity-low energy ion scattering (HS-LEIS). A bare, clean native oxide - terminated silicon wafer has 3.66 OH/nm2, which agrees with density functional theory (DFT) calculations from the literature. After TDMAMS modification of native oxide-terminated silicon, the number of surface silanols decreases by a factor of ca. 10 (to 0.31 OH/nm2). Intermediate surface testing (IST) was used to characterize the surface activities of functionalized capillaries. It suggested a significant deactivation/passivation of the capillary with some surface silanols remaining; the modified capillary shows significant deactivation compared to the native/unmodified fused silica tubing. We believe that this methodology for determining the number of residual silanols on silanized fused silica will be enabling for chromatography.

Klíčová slova

Capillary column; Fused silica; Silane; Surface silanol; Low energy ion scattering; Tag-and-Count; Dimethylzinc; Atomic layer deposition

Autoři

Moeini, B.; Pinder, JW.; Avval, TG.; Jacobsen, C.; Brongersma, HH.; Prusa, S.; Bábik, P.; Vanicková, E.; Argyle, MD.; Strohmeier, BR.; Jones, B.; Shollenberger, D.; Bell, DS.; Linford, MR.

Vydáno

27. 9. 2023

Nakladatel

ELSEVIER

Místo

AMSTERDAM

ISSN

1873-3778

Periodikum

JOURNAL OF CHROMATOGRAPHY A

Ročník

1707

Číslo

464248

Stát

Nizozemsko

Strany počet

9

URL

https://www.sciencedirect.com/science/article/pii/S0021967323004739?via%3Dihub

BibTex

@article{BUT187337,
  author="Moeini, B. and Pinder, JW. and Avval, TG. and Jacobsen, C. and Brongersma, HH. and Prusa, S. and Bábik, P. and Vanicková, E. and Argyle, MD. and Strohmeier, BR. and Jones, B. and Shollenberger, D. and Bell, DS. and Linford, MR.",
  title="Controlling the surface silanol density in capillary columns and planar silicon via the self-limiting, gas-phase deposition of tris(dimethylamino) methylsilane, and quantification of surface silanols after silanization by low energy ion scattering",
  journal="JOURNAL OF CHROMATOGRAPHY A",
  year="2023",
  volume="1707",
  number="464248",
  pages="9",
  doi="10.1016/j.chroma.2023.464248",
  issn="1873-3778",
  url="https://www.sciencedirect.com/science/article/pii/S0021967323004739?via%3Dihub"
}