Erratum to: “Atomic Layer Deposition of Alumina onto Carbon Fibers”

Abstract

T HERE was a mistake in Fig. 8 of the original article. The thermogravimetric analysis of the uncoated fibres was assigned to the wrong time scale and this gave rise to incorrect assignments of oxidation temperatures. The correct diagram is shown below.Taking the corrected diagram into account, the following passages in the text need to be replaced.In the abstract, the last two sentences need to be replaced by:The oxidation onset temperature was 630°C for both uncoated fibers and fibers coated with a 30-nm-thick layer of alumina. The oxidation onset temperature increased gradually with increasing coating thickness up to 660°C at a thickness of 120 nm.Page 2014, left column, last paragraph, last two sentences and right column, first paragraph, first sentence need to be replaced byThe results are shown in Fig. 8; the oxidation onset temperature (3% weight loss) for the uncoated fiber is approximately 630°C and the fibers are completely burned at temperatures of approximately 825°C. In case of fibers coated with a 33-nm-thick layer of alumina, the oxidation starts at almost the same temperature and the fibers are burned completely at a temperature of approximately 870°C. With increasing thickness of the coating, the oxidation onset temperature increases slightly and also the amount of ash. Oxidation onset temperature reached a plateau value of 660°C for fibers bearing a coating of a thickness of 120 nm or more. Thus, there might be a moderate oxidation protection of the fibres by the alumina coating.The following statements in the paper cannot be considered true anymore:Page 2014, abstract: The alumina coating improved oxidation resistance of the carbon fiber significantly Page 2020, last paragraph: A comparatively thin layer is already sufficient to delay oxidation significantly Page 2021, conclusions: The coating is efficient in slowing down the oxidation of carbon fibers Fig. 8. Thermogravimetric analysis of coated fibers with various coating thicknesses. The specimens were heated from 30°C to 900°C with a heating rate of 5°C/min and subsequently held at 900°C for 30 min in synthetic air. Oxidation onset temperature increases slightly with increasing coating thickness and levels off for coating thicknesses exceeding approximately 100 nm. 3604

Atomic layer deposition of alumina on γ‐Al2O3 nanofibres

“…Based on similar works of ALD of alumina , it has been estimated growth per cycle to be around 0.1 nm, which gives about 10 nm thick films per 100 cycles or in fibres case adds about 20 nm in diameter. Using 40 nm fibres as starting substrate, the final diameter should be around 60 nm, which is the first (growth at 150 °C) case here.…”

“…some oxide nanoparticles . Therefore, ALD can be applied for the treatment of high aspect ratio objects . ALD can preliminarily be conducted at lower temperatures as compared to temperatures usually needed for sintering of ceramics and may end up with the production of conformal crystalline or amorphous thin films .…”

“…As for ALD on fibrous substrates, the method has been used, for instance, for the growth of Al 2 O 3 on cellulose , metal matrices or carbon . The ability to shape and protect nanofibres facilitates their handling and customization for different applications.…”

Improved oxidation resistance of organic/inorganic composite atomic layer deposition coated cellulose nanocrystal aerogels

“…17 It has recently been shown that ALD films of Al 2 O 3 as thin as 25 nm make excellent moisture permeation barriers. 18 ALD Al 2 O 3 films have also been shown to protect other carbon-based structures from oxidation, in one case increasing the oxidation temperature of carbon fibers by 60 C. 19 In this work, ALD is used to deposit conformal Al 2 O 3 coatings on CNC aerogels to improve oxidation resistance for incorporation as reinforcing fillers in polymers. Electron probe microanalysis (EPMA) is used to measure the penetration of Al into the aerogel.…”

Wetting transitions of polymers via thermal and plasma enhanced atomic layer depositions

“…Examples include ALD coating of synthetic polymers such as poly(ethylene terephthalate), polyethylene, or poly(vinyl alcohol), [4][5][6] polytetrafluroethylene 7 biopolymers such as celluloses, 8,9 spider silk, 10 etc. 12,13 Biopolymers usually comprise reactive groups that readily react with inorganic precursors, but for synthetic polymers or carbon, one might face the problem that there are no reactive groups that might covalently bind a monolayer of reactants at the initial deposition stage. 12,13 Biopolymers usually comprise reactive groups that readily react with inorganic precursors, but for synthetic polymers or carbon, one might face the problem that there are no reactive groups that might covalently bind a monolayer of reactants at the initial deposition stage.…”