2021
DOI: 10.3390/molecules26030679
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Effect of Polymer Removal on the Morphology and Phase of the Nanoparticles in All-Inorganic Heterostructures Synthesized via Two-Step Polymer Infiltration

Abstract: Polymer templates play an essential role in the robust infiltration-based synthesis of functional multicomponent heterostructures with controlled structure, porosity, and composition. Such heterostructures are be used as hybrid organic–inorganic composites or as all-inorganic systems once the polymer templates are removed. Using iron oxide/alumina heterostructures formed by two-step infiltration of polystyrene-block-polyvinyl pyridine block copolymer with iron and aluminum precursors from the solution and vapo… Show more

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Cited by 3 publications
(4 citation statements)
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“…Similarly, in the case of the field-cooled sample, the magnetic moments were aligned at a higher applied field resulting in higher total magnetization at 5 K starting to decrease with heating. These observations are in agreement with previously reported studies on Fe3O4 nanoparticles incorporation in other materials, including ceramic matrices [43].…”
Section: Magnetization Testsupporting
confidence: 94%
“…Similarly, in the case of the field-cooled sample, the magnetic moments were aligned at a higher applied field resulting in higher total magnetization at 5 K starting to decrease with heating. These observations are in agreement with previously reported studies on Fe3O4 nanoparticles incorporation in other materials, including ceramic matrices [43].…”
Section: Magnetization Testsupporting
confidence: 94%
“…Figure a depicts the major steps involved in porous ZnO coatings via SIS using swollen BCP templates such as (i) deposition of the BCP layer via spin-coating, (ii) swelling of the deposited BCP in ethanol for 1 h at 75 °C, (iii) infiltration of swollen BCP with ZnO precursors by cycling the exposure of template to DEZ and H 2 O, and (iv) formation of all-inorganic porous ZnO by polymer removal. The polymer can be removed by thermal annealing or ozone cleaning . In this study, we implemented ozone cleaning since prepared QCM samples cannot be heated up to 450 °C required for the complete removal of organics.…”
Section: Results and Discussionmentioning
confidence: 99%
“…The polymer can be removed by thermal annealing or ozone cleaning. 33 In this study, we implemented ozone cleaning since prepared QCM samples cannot be heated up to 450 °C required for the complete removal of organics. QCM analysis (Figure 1b) of BCP templates of varied thicknesses spin-coated on the QCM substrates was used to monitor the mass changes introduced during different steps of the synthesis of porous ZnO conformal coatings.…”
Section: Methodsmentioning
confidence: 99%
“…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%