Structural morphology of carbon nanofibers grown on different substrates

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Standard

Structural morphology of carbon nanofibers grown on different substrates. / Sainio, Sami; Jiang, Hua; Caro, Miguel A.; Koehne, Jessica; Lopez-Acevedo, Olga; Koskinen, Jari; Meyyappan, Meyya; Laurila, Tomi.

julkaisussa: Carbon, Vuosikerta 98, Nro 12, 2016, s. 343-351.

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Harvard

APA

Vancouver

Author

Bibtex - Lataa

@article{19bc0c551d6e49fa95faf7078f245b37,
title = "Structural morphology of carbon nanofibers grown on different substrates",
abstract = "We present a detailed microstructural study comparing conventional carbon nanofibers (CNFs) and novel carbon hybrid CNF materials. The hybrid consists of CNFs grown on top of tetrahedral amorphous carbon (ta-C) thin films on silicon with nickel catalyst and Ti adhesion layers. The conventional CNFs were grown on silicon with nickel catalyst and Cr layers. Even though CNFs can be grown in both systems by tip growth, the micro- and nanoscale features are very different in the two systems. The crystalline structure of the CNF in the hybrid case changes from horizontal alignment to near-vertical alignment from the root to the tip and no bamboo structure is observed. The results show that micro- and nanoscale properties of CNFs grown under the same process conditions can be readily altered by using a sacrificial ta-C layer below the metallic layer to prevent the alloying of Ni with carbide-forming metals used as adhesion promoters and to act as an additional carbon source during the pre-annealing stage. The experimental results are further rationalized with the aid of assessed thermodynamic data and simulations based on density functional theory (DFT) with van der Waals (vdW) corrections.",
keywords = "carbon nanofibers, structural morphology",
author = "Sami Sainio and Hua Jiang and Caro, {Miguel A.} and Jessica Koehne and Olga Lopez-Acevedo and Jari Koskinen and Meyya Meyyappan and Tomi Laurila",
year = "2016",
doi = "10.1016/j.carbon.2015.11.021",
language = "English",
volume = "98",
pages = "343--351",
journal = "Carbon",
issn = "0008-6223",
number = "12",

}

RIS - Lataa

TY - JOUR

T1 - Structural morphology of carbon nanofibers grown on different substrates

AU - Sainio, Sami

AU - Jiang, Hua

AU - Caro, Miguel A.

AU - Koehne, Jessica

AU - Lopez-Acevedo, Olga

AU - Koskinen, Jari

AU - Meyyappan, Meyya

AU - Laurila, Tomi

PY - 2016

Y1 - 2016

N2 - We present a detailed microstructural study comparing conventional carbon nanofibers (CNFs) and novel carbon hybrid CNF materials. The hybrid consists of CNFs grown on top of tetrahedral amorphous carbon (ta-C) thin films on silicon with nickel catalyst and Ti adhesion layers. The conventional CNFs were grown on silicon with nickel catalyst and Cr layers. Even though CNFs can be grown in both systems by tip growth, the micro- and nanoscale features are very different in the two systems. The crystalline structure of the CNF in the hybrid case changes from horizontal alignment to near-vertical alignment from the root to the tip and no bamboo structure is observed. The results show that micro- and nanoscale properties of CNFs grown under the same process conditions can be readily altered by using a sacrificial ta-C layer below the metallic layer to prevent the alloying of Ni with carbide-forming metals used as adhesion promoters and to act as an additional carbon source during the pre-annealing stage. The experimental results are further rationalized with the aid of assessed thermodynamic data and simulations based on density functional theory (DFT) with van der Waals (vdW) corrections.

AB - We present a detailed microstructural study comparing conventional carbon nanofibers (CNFs) and novel carbon hybrid CNF materials. The hybrid consists of CNFs grown on top of tetrahedral amorphous carbon (ta-C) thin films on silicon with nickel catalyst and Ti adhesion layers. The conventional CNFs were grown on silicon with nickel catalyst and Cr layers. Even though CNFs can be grown in both systems by tip growth, the micro- and nanoscale features are very different in the two systems. The crystalline structure of the CNF in the hybrid case changes from horizontal alignment to near-vertical alignment from the root to the tip and no bamboo structure is observed. The results show that micro- and nanoscale properties of CNFs grown under the same process conditions can be readily altered by using a sacrificial ta-C layer below the metallic layer to prevent the alloying of Ni with carbide-forming metals used as adhesion promoters and to act as an additional carbon source during the pre-annealing stage. The experimental results are further rationalized with the aid of assessed thermodynamic data and simulations based on density functional theory (DFT) with van der Waals (vdW) corrections.

KW - carbon nanofibers

KW - structural morphology

U2 - 10.1016/j.carbon.2015.11.021

DO - 10.1016/j.carbon.2015.11.021

M3 - Article

VL - 98

SP - 343

EP - 351

JO - Carbon

JF - Carbon

SN - 0008-6223

IS - 12

ER -

ID: 1477538