Photoactive Langmuir–Blodgett, Freely Suspended and Free Standing Films of Carboxylate Ligand-Coated ZnO Nanocrystals

Jan Paczesny , Małgorzata Wolska-Pietkiewicz , Ilona Binkiewicz , Monika Wadowska , Zbigniew Wróbel , Kinga Matuła , Wojciech Nogala , Janusz Lewiński , Robert Hołyst

Abstract

A new possibility for the formation of macroscopic and photoactive structures from zinc oxide nanocrystals is described. Photoactive freely suspended and free-standing films of macroscopic area (up to few square millimeters) and submicrometer thickness (up to several hundreds of nanometers) composed of carboxylate ligand-coated zinc oxide nanocrystallites (RCO2–ZnO NCs) of diameter less than 5 nm are prepared according to a modified Langmuir–Schaefer method. First, the suspension of RCO2–ZnO NCs is applied onto the air/water interface. Upon compression, the films become turbid and elastic. The integrity of such structures is ensured by interdigitation of ligands stabilizing ZnO NCs. Great elasticity allows transfer of the films onto a metal frame as a freely suspended film. Such membranes are afterward extracted from the supporting frame to form free-standing films of macroscopic area. Because the integrity of the films is maintained by ligands, no abolishment of quantum confinement occurs, and films retain spectroscopic properties of initial RCO2–ZnO NCs. The mechanism of formation of thin films of RCO2–ZnO NCs at the air/water interface is discussed in detail.
Author Jan Paczesny - [Institute of Physical Chemistry of the Polish Academy of Sciences]
Jan Paczesny,,
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, Małgorzata Wolska-Pietkiewicz (FC / DCOC)
Małgorzata Wolska-Pietkiewicz,,
- Department Of Catalysis And Organometallic Chemistry
, Ilona Binkiewicz
Ilona Binkiewicz,,
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, Monika Wadowska
Monika Wadowska,,
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, Zbigniew Wróbel - [Institute of Physical Chemistry of the Polish Academy of Sciences]
Zbigniew Wróbel,,
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, Kinga Matuła - [Institute of Physical Chemistry of the Polish Academy of Sciences]
Kinga Matuła,,
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, Wojciech Nogala - [Institute of Physical Chemistry of the Polish Academy of Sciences]
Wojciech Nogala,,
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, Janusz Lewiński (FC / DCOC)
Janusz Lewiński,,
- Department Of Catalysis And Organometallic Chemistry
, Robert Hołyst - [Institute of Physical Chemistry of the Polish Academy of Sciences]
Robert Hołyst,,
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Journal seriesACS Applied Materials & Interfaces, ISSN 1944-8244
Issue year2016
Vol8
No21
Pages13532-13541
Publication size in sheets0.5
Keywords in Englishaggregation; capping ligand; interdigitation; nanoparticles; self-assembly; self-supported films; zinc oxide
ASJC Classification2500 General Materials Science
DOIDOI:10.1021/acsami.6b03579
URL http://pubs.acs.org/doi/abs/10.1021/acsami.6b03579
Languageen angielski
File
acs_2016_ZnO carbox.pdf 8.32 MB
Score (nominal)40
Score sourcejournalList
ScoreMinisterial score = 40.0, 03-02-2020, ArticleFromJournal
Ministerial score (2013-2016) = 40.0, 03-02-2020, ArticleFromJournal
Publication indicators Scopus Citations = 13; WoS Citations = 12; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 1.536; WoS Impact Factor: 2016 = 7.504 (2) - 2016=7.823 (5)
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