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Adsorption on Nanopores of Different Cross Sections Made by Electron Beam Nanolithography.
Langmuir. 2018 01 09; 34(1):106-114.L

Abstract

Adsorption on nanoporous matrices is characterized by a pronounced hysteresis loop in the adsorption isotherm, when the substrate is loaded and unloaded with adsorbate, the origin of which is a matter of immense debate in the literature. In this work, we report a study of argon adsorption at 85 K on nonconnecting nanopores with one end closed to the surrounding where the effects of different pore cross sections fabricated by electron beam lithography (EBL) are investigated. A polymethylmethacrylate (PMMA) resist is deposited on the electrodes of a sensitive quartz crystal microbalance without degradation of the resonance quality factor or the long-term and short-term stabilities of the device even at cryogenic temperatures. Four different pores' cross sections: circular, square, rectangular, and triangular, are produced from EBL, and the isotherms for these pore shapes exhibit pronounced hysteresis loops whose adsorption and desorption branches are nearly vertical and have almost the same slopes. No difference is observed in the hysteresis loops of the isotherms for the pores with triangular and square cross sections, whereas the hysteresis loop for the pore with circular cross sections is much narrower, suggesting that they are more regular than the other pores. All of these observations suggest that the hysteresis behavior resulted mainly from microscopic geometric irregularities present in these porous matrices.

Authors+Show Affiliations

Dipartimento di Fisica e Astronomia G. Galilei, Università di Padova , via Marzolo 8, 35131 Padova, Italy.Dipartimento di Fisica e Astronomia G. Galilei, Università di Padova , via Marzolo 8, 35131 Padova, Italy.School of Chemical Engineering, University of Queensland , St. Lucia, Queensland 4072, Australia.School of Chemical Engineering, University of Queensland , St. Lucia, Queensland 4072, Australia.Istituto Italiano di Tecnologia , via Morego 30, 16163 Genova, Italy.Istituto Italiano di Tecnologia , via Morego 30, 16163 Genova, Italy.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29211486

Citation

Bruschi, Lorenzo, et al. "Adsorption On Nanopores of Different Cross Sections Made By Electron Beam Nanolithography." Langmuir : the ACS Journal of Surfaces and Colloids, vol. 34, no. 1, 2018, pp. 106-114.
Bruschi L, Mistura G, Prasetyo L, et al. Adsorption on Nanopores of Different Cross Sections Made by Electron Beam Nanolithography. Langmuir. 2018;34(1):106-114.
Bruschi, L., Mistura, G., Prasetyo, L., Do, D. D., Dipalo, M., & De Angelis, F. (2018). Adsorption on Nanopores of Different Cross Sections Made by Electron Beam Nanolithography. Langmuir : the ACS Journal of Surfaces and Colloids, 34(1), 106-114. https://doi.org/10.1021/acs.langmuir.7b03695
Bruschi L, et al. Adsorption On Nanopores of Different Cross Sections Made By Electron Beam Nanolithography. Langmuir. 2018 01 9;34(1):106-114. PubMed PMID: 29211486.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Adsorption on Nanopores of Different Cross Sections Made by Electron Beam Nanolithography. AU - Bruschi,Lorenzo, AU - Mistura,Giampaolo, AU - Prasetyo,Luisa, AU - Do,Duong D, AU - Dipalo,Michele, AU - De Angelis,Francesco, Y1 - 2017/12/15/ PY - 2017/12/7/pubmed PY - 2017/12/7/medline PY - 2017/12/7/entrez SP - 106 EP - 114 JF - Langmuir : the ACS journal of surfaces and colloids JO - Langmuir VL - 34 IS - 1 N2 - Adsorption on nanoporous matrices is characterized by a pronounced hysteresis loop in the adsorption isotherm, when the substrate is loaded and unloaded with adsorbate, the origin of which is a matter of immense debate in the literature. In this work, we report a study of argon adsorption at 85 K on nonconnecting nanopores with one end closed to the surrounding where the effects of different pore cross sections fabricated by electron beam lithography (EBL) are investigated. A polymethylmethacrylate (PMMA) resist is deposited on the electrodes of a sensitive quartz crystal microbalance without degradation of the resonance quality factor or the long-term and short-term stabilities of the device even at cryogenic temperatures. Four different pores' cross sections: circular, square, rectangular, and triangular, are produced from EBL, and the isotherms for these pore shapes exhibit pronounced hysteresis loops whose adsorption and desorption branches are nearly vertical and have almost the same slopes. No difference is observed in the hysteresis loops of the isotherms for the pores with triangular and square cross sections, whereas the hysteresis loop for the pore with circular cross sections is much narrower, suggesting that they are more regular than the other pores. All of these observations suggest that the hysteresis behavior resulted mainly from microscopic geometric irregularities present in these porous matrices. SN - 1520-5827 UR - https://www.unboundmedicine.com/medline/citation/29211486/Adsorption_on_Nanopores_of_Different_Cross_Sections_Made_by_Electron_Beam_Nanolithography L2 - https://dx.doi.org/10.1021/acs.langmuir.7b03695 DB - PRIME DP - Unbound Medicine ER -
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