2021
DOI: 10.1021/acsami.1c08225
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Swelling-Assisted Sequential Infiltration Synthesis of Nanoporous ZnO Films with Highly Accessible Pores and Their Sensing Potential for Ethanol

Abstract: Here, we report a swelling-assisted sequential infiltration synthesis (SIS) approach for the design of highly porous zinc oxide (ZnO) films by infiltration of block copolymer templates such as polystyrene-block-polyvinyl pyridine with inorganic precursors followed by UV ozone-assisted removal of the polymer template. We show that porous ZnO coatings with the thickness in the range between 140 and 420 nm can be obtained using only five cycles of SIS. The pores in ZnO fabricated via swelling-assisted SIS are hig… Show more

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Cited by 12 publications
(17 citation statements)
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“… 56 The fundamental role of the interface between the polymeric domains was investigated using a different approach by Berman and Shevchenko. 15 , 27 , 29 They took advantage of the swelling of the PS- b -P4VP matrix to control the porosity of BCP materials. BCP swelling increases free volume in the polymer matrix and consequently diffusivity of TMA and H 2 O precursors promoting incorporation of Al 2 O 3 into the P4VP component of the polymer matrix.…”
Section: Discussionmentioning
confidence: 99%
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“… 56 The fundamental role of the interface between the polymeric domains was investigated using a different approach by Berman and Shevchenko. 15 , 27 , 29 They took advantage of the swelling of the PS- b -P4VP matrix to control the porosity of BCP materials. BCP swelling increases free volume in the polymer matrix and consequently diffusivity of TMA and H 2 O precursors promoting incorporation of Al 2 O 3 into the P4VP component of the polymer matrix.…”
Section: Discussionmentioning
confidence: 99%
“…Overall, these features implied that the trapping of the metal precursor within PMMA nanodomains is more efficient that in a homogenous PMMA film due to the presence of the percolation pathways provided by the PS domains inside the self-assembled BCP film . The fundamental role of the interface between the polymeric domains was investigated using a different approach by Berman and Shevchenko. ,, They took advantage of the swelling of the PS- b -P4VP matrix to control the porosity of BCP materials. BCP swelling increases free volume in the polymer matrix and consequently diffusivity of TMA and H 2 O precursors promoting incorporation of Al 2 O 3 into the P4VP component of the polymer matrix.…”
Section: Discussionmentioning
confidence: 99%
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“…The infiltration of polymer templates with alumina precursors was performed using a SIS method that has been described earlier. , A GEMStar thermal atomic layer deposition (ALD) system was used for the process for convenience, though we note that our process is not an ALD process (deposition rates are much higher and the deposition is not atomic layer-by-layer) and could be carried out in other appropriately configured chemical vapor deposition systems as well. TMA and H 2 O were used as gas-phase precursors.…”
Section: Methodsmentioning
confidence: 99%
“…VPI, which is also referred to as sequential infiltration synthesis (SIS), has been demonstrated for enhancing various properties of polymers such as mechanical, (Dusoe et al, 2017); (Lee et al, 2009); (Lee et al, 2010); (Gregorczyk et al, 2015) chemical, (Tseng et al, 2011;TsengTseng et al, 2011;McGuinness et al, 2020), electrical, (Nam et al, 2015a;Subramanian et al, 2019), optical, (Rahman et al, 2014;Rahman et al, 2015;Ocola et al, 2016), triboelectric, (Yu et al, 2015;Yu and Wang, 2016), and thermal properties. (Bamford et al, 2021) These hybrids have been useful for a wide variety of applications (Subramanian et al, 2018); (Berman and Shevchenko, 2020) such as gas separation, (Greil et al, 2017), oil absorption, (Barry et al, 2017), photodetectors, (Nam and Stein, 2017), gas sensors, (Pleshek et al, 2021), energy conversion. (Yu et al, 2015) and filteration.…”
Section: Vapor-phase Infiltration Of Functional Materialsmentioning
confidence: 99%