The Role of Temperature on the Degree of End-Closing and Filling of Single-Walled Carbon Nanotubes.
carbon nanocapsules
encapsulation
end-closing
filled carbon nanotubes
sealing
Journal
Nanomaterials (Basel, Switzerland)
ISSN: 2079-4991
Titre abrégé: Nanomaterials (Basel)
Pays: Switzerland
ID NLM: 101610216
Informations de publication
Date de publication:
11 Dec 2021
11 Dec 2021
Historique:
received:
05
11
2021
revised:
26
11
2021
accepted:
02
12
2021
entrez:
24
12
2021
pubmed:
25
12
2021
medline:
25
12
2021
Statut:
epublish
Résumé
Carbon nanotubes (CNTs), owing to their high surface area-to-volume ratio and hollow core, can be employed as hosts for adsorbed and/or encapsulated molecules. At high temperatures, the ends of CNTs close spontaneously, which is relevant for several applications, including catalysis, gas storage, and biomedical imaging and therapy. This study highlights the influence of the annealing temperature in the range between 400 and 1100 °C on the structure and morphology of single-walled CNTs. The nitrogen adsorption and density functional theory calculations indicate that the fraction of end-closed CNTs increases with temperature. Raman spectroscopy reveals that the thermal treatment does not alter the tubular structure. Insight is also provided into the efficacy of CNTs filling from the molten phase, depending on the annealing temperature. The CNTs are filled with europium (III) chloride and analyzed by using electron microscopy (scanning electron microscopy and high-resolution transmission electron microscopy) and energy-dispersive X-ray spectroscopy, confirming the presence of filling and closed ends. The filling yield increases with temperature, as determined by thermogravimetric analysis. The obtained results show that the apparent surface area of CNTs, fraction of closed ends, and amount of encapsulated payload can be tailored via annealing.
Identifiants
pubmed: 34947714
pii: nano11123365
doi: 10.3390/nano11123365
pmc: PMC8704686
pii:
doi:
Types de publication
Journal Article
Langues
eng
Références
Nanomaterials (Basel). 2021 Oct 09;11(10):
pubmed: 34685090
Adv Mater. 2014 Apr 2;26(13):2016-21
pubmed: 24339133
Nat Commun. 2011 Jul 26;2:407
pubmed: 21792186
Nanomaterials (Basel). 2021 Sep 26;11(10):
pubmed: 34684941
Front Chem. 2021 Oct 01;9:727574
pubmed: 34660529
Nanoscale. 2019 Apr 25;11(17):8073-8090
pubmed: 30994692
J Colloid Interface Sci. 2013 Feb 1;391:74-85
pubmed: 23107168
J Phys Chem B. 2006 Nov 16;110(45):22318-22
pubmed: 17091970
ACS Nano. 2021 Aug 9;:
pubmed: 34370946
Small. 2008 Sep;4(9):1501-6
pubmed: 18702121
ACS Appl Mater Interfaces. 2017 Feb 22;9(7):5709-5716
pubmed: 28072512
Proc Natl Acad Sci U S A. 2021 Sep 14;118(37):
pubmed: 34508003
Adv Colloid Interface Sci. 2021 Nov;297:102542
pubmed: 34655931
Ann Occup Hyg. 2013 Nov;57(9):1148-66
pubmed: 24029925
Nanomaterials (Basel). 2021 Oct 27;11(11):
pubmed: 34835628
Int J Nanomedicine. 2012;7:1953-64
pubmed: 22619533
Nat Commun. 2016 Oct 26;7:13118
pubmed: 27782209
ACS Nano. 2020 Jan 28;14(1):129-141
pubmed: 31742990
Front Bioeng Biotechnol. 2021 Mar 10;9:644793
pubmed: 33777916
ACS Cent Sci. 2016 Apr 27;2(4):190-200
pubmed: 27163049
Chem Commun (Camb). 2008 May 14;(18):2164-6
pubmed: 18438503
Chem Commun (Camb). 2011 Feb 7;47(5):1607-9
pubmed: 21113509
Inorg Chem. 2019 Nov 18;58(22):15216-15224
pubmed: 31693345
Phys Chem Chem Phys. 2015 Dec 21;17(47):31662-9
pubmed: 26556303
ACS Appl Mater Interfaces. 2015 Jun 17;7(23):12663-70
pubmed: 26005759
Nanomaterials (Basel). 2021 Apr 09;11(4):
pubmed: 33918769
ACS Nano. 2018 Jul 24;12(7):6648-6656
pubmed: 29975504