Diffusion and outgassing of O2 in amorphous SiO2 silica nanoparticles with specific surface properties

S. Agnello; A. Alessi; G. Iovino; M. Cannas; F. M. Gelardi; R. Boscaino

doi:10.1109/NMDC.2014.6997425

Diffusion and outgassing of O₂ in amorphous SiO₂ silica nanoparticles with specific surface properties

S. Agnello
, A. Alessi
, G. Iovino
, M. Cannas
, F. M. Gelardi
, R. Boscaino

University of Palermo

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Silica nanoparticles with hydrophilic and hydrophobic surface and average diameter of 12 and 40 nm are investigated to study the surface group influence on the diffusion process of molecular oxygen. The O₂ diffusion kinetics and molecular solubility are determined by Raman/Photoluminescence measurements. Thermal treatments up to 127°C in controlled atmosphere show that the surface chemistry of nanoparticles is not changed, the equilibrium emission of O₂ depends on nanoparticles surface properties, whereas the dynamics of diffusion is surface independent suggesting that surface groups could only affect overall content or detectability of interstitial molecules. The post loading outgassing in nanoparticles of 40 nm average diameters has evidenced a long term stability of embedded O₂ in a time scale of months a promising aspect for nanoprobing applications.

Original language	English
Title of host publication	2014 IEEE 9th Nanotechnology Materials and Devices Conference, NMDC 2014
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	73-76
Number of pages	4
ISBN (Electronic)	9781479980604
DOIs	https://doi.org/10.1109/NMDC.2014.6997425
Publication status	Published - 23 Dec 2014
Externally published	Yes
Event	2014 9th IEEE Nanotechnology Materials and Devices Conference, NMDC 2014 - Sicily, Italy Duration: 12 Oct 2014 → 15 Oct 2014

Publication series

Name	2014 IEEE 9th Nanotechnology Materials and Devices Conference, NMDC 2014

Conference

Conference	2014 9th IEEE Nanotechnology Materials and Devices Conference, NMDC 2014
Country/Territory	Italy
City	Sicily
Period	12/10/14 → 15/10/14

Access to Document

10.1109/NMDC.2014.6997425

Cite this

Agnello, S., Alessi, A., Iovino, G., Cannas, M., Gelardi, F. M., & Boscaino, R. (2014). Diffusion and outgassing of O₂ in amorphous SiO₂ silica nanoparticles with specific surface properties. In 2014 IEEE 9th Nanotechnology Materials and Devices Conference, NMDC 2014 (pp. 73-76). Article 6997425 (2014 IEEE 9th Nanotechnology Materials and Devices Conference, NMDC 2014). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/NMDC.2014.6997425

Agnello, S. ; Alessi, A. ; Iovino, G. et al. / Diffusion and outgassing of O₂ in amorphous SiO₂ silica nanoparticles with specific surface properties. 2014 IEEE 9th Nanotechnology Materials and Devices Conference, NMDC 2014. Institute of Electrical and Electronics Engineers Inc., 2014. pp. 73-76 (2014 IEEE 9th Nanotechnology Materials and Devices Conference, NMDC 2014).

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title = "Diffusion and outgassing of O2 in amorphous SiO2 silica nanoparticles with specific surface properties",

abstract = "Silica nanoparticles with hydrophilic and hydrophobic surface and average diameter of 12 and 40 nm are investigated to study the surface group influence on the diffusion process of molecular oxygen. The O2 diffusion kinetics and molecular solubility are determined by Raman/Photoluminescence measurements. Thermal treatments up to 127°C in controlled atmosphere show that the surface chemistry of nanoparticles is not changed, the equilibrium emission of O2 depends on nanoparticles surface properties, whereas the dynamics of diffusion is surface independent suggesting that surface groups could only affect overall content or detectability of interstitial molecules. The post loading outgassing in nanoparticles of 40 nm average diameters has evidenced a long term stability of embedded O2 in a time scale of months a promising aspect for nanoprobing applications.",

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Agnello, S, Alessi, A, Iovino, G, Cannas, M, Gelardi, FM & Boscaino, R 2014, Diffusion and outgassing of O₂ in amorphous SiO₂ silica nanoparticles with specific surface properties. in 2014 IEEE 9th Nanotechnology Materials and Devices Conference, NMDC 2014., 6997425, 2014 IEEE 9th Nanotechnology Materials and Devices Conference, NMDC 2014, Institute of Electrical and Electronics Engineers Inc., pp. 73-76, 2014 9th IEEE Nanotechnology Materials and Devices Conference, NMDC 2014, Sicily, Italy, 12/10/14. https://doi.org/10.1109/NMDC.2014.6997425

Diffusion and outgassing of O₂ in amorphous SiO₂ silica nanoparticles with specific surface properties. / Agnello, S.; Alessi, A.; Iovino, G. et al.
2014 IEEE 9th Nanotechnology Materials and Devices Conference, NMDC 2014. Institute of Electrical and Electronics Engineers Inc., 2014. p. 73-76 6997425 (2014 IEEE 9th Nanotechnology Materials and Devices Conference, NMDC 2014).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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N2 - Silica nanoparticles with hydrophilic and hydrophobic surface and average diameter of 12 and 40 nm are investigated to study the surface group influence on the diffusion process of molecular oxygen. The O2 diffusion kinetics and molecular solubility are determined by Raman/Photoluminescence measurements. Thermal treatments up to 127°C in controlled atmosphere show that the surface chemistry of nanoparticles is not changed, the equilibrium emission of O2 depends on nanoparticles surface properties, whereas the dynamics of diffusion is surface independent suggesting that surface groups could only affect overall content or detectability of interstitial molecules. The post loading outgassing in nanoparticles of 40 nm average diameters has evidenced a long term stability of embedded O2 in a time scale of months a promising aspect for nanoprobing applications.

AB - Silica nanoparticles with hydrophilic and hydrophobic surface and average diameter of 12 and 40 nm are investigated to study the surface group influence on the diffusion process of molecular oxygen. The O2 diffusion kinetics and molecular solubility are determined by Raman/Photoluminescence measurements. Thermal treatments up to 127°C in controlled atmosphere show that the surface chemistry of nanoparticles is not changed, the equilibrium emission of O2 depends on nanoparticles surface properties, whereas the dynamics of diffusion is surface independent suggesting that surface groups could only affect overall content or detectability of interstitial molecules. The post loading outgassing in nanoparticles of 40 nm average diameters has evidenced a long term stability of embedded O2 in a time scale of months a promising aspect for nanoprobing applications.

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Agnello S, Alessi A, Iovino G, Cannas M, Gelardi FM, Boscaino R. Diffusion and outgassing of O₂ in amorphous SiO₂ silica nanoparticles with specific surface properties. In 2014 IEEE 9th Nanotechnology Materials and Devices Conference, NMDC 2014. Institute of Electrical and Electronics Engineers Inc. 2014. p. 73-76. 6997425. (2014 IEEE 9th Nanotechnology Materials and Devices Conference, NMDC 2014). doi: 10.1109/NMDC.2014.6997425