Interface dynamics and mechanisms of nanoindented alkanethiol self-assembled monolayers using molecular simulations

Fang, Te‐Hua; Chang, Wen–Yang; Lin, Shiang-Jiun; Fang, Chun-Nan

doi:10.1016/j.jcis.2010.01.052

Cited by 12 publications

(7 citation statements)

References 49 publications

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“…SAM-modified surfaces have been applied for biosensing, 12 corrosion inhibition, 13 wetting inhibition, 14 and nanolithography. 15 There have been many studies that have investigated the mechanical properties of SAM-modified Au, [16][17][18][19][20][21] but most of them do not describe the mechanical properties of Au, but SAMs. [16][17][18][19][20] Recently, it was found that plastic deformation of Au occurs more easily in SAM-modified Au films than in unmodified Au films owing to chemomechanical effects.…”

mentioning

confidence: 99%

“…15 There have been many studies that have investigated the mechanical properties of SAM-modified Au, [16][17][18][19][20][21] but most of them do not describe the mechanical properties of Au, but SAMs. [16][17][18][19][20] Recently, it was found that plastic deformation of Au occurs more easily in SAM-modified Au films than in unmodified Au films owing to chemomechanical effects. 21 In the present work, the mechanical properties of nanoporous Au modified by SAMs were investigated using hardness tests.…”

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confidence: 99%

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Mechanical characterization of nanoporous Au modified with self-assembled monolayers

Miyazawa

Ishimoto

Hakamada

et al. 2016

Applied Physics Letters

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The surface of nanoporous Au was modified with self-assembled monolayers (SAMs) of 6-mercapto-1-hexanol and the hardness tests were performed on the SAM-modified and non-modified nanoporous Au to investigate the effects of SAM modification on the mechanical properties of nanoporous Au. In addition, the origin of the chemomechanical effects was investigated by first principles shear test simulations on an Au-S alloy. The SAM-modified nanoporous Au showed lower hardness than the non-modified nanoporous Au. The loading rate dependence tests showed that the activation volume was low for both, indicating that events of a short range play an important role in deformation of nanoporous Au, regardless of whether the nanoporous Au was modified with SAMs. It was suggested from the simulations that the lower hardness for the SAM-modified nanoporous Au is because movement of dislocation endpoints at the surface is facilitated by chemical effects of Au-S bonding.

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confidence: 99%

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confidence: 99%

Mechanical characterization of nanoporous Au modified with self-assembled monolayers

Miyazawa

Ishimoto

Hakamada

et al. 2016

Applied Physics Letters

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“…Also a few molecular dynamics simulation studies have been performed for systems consisting of alkanethiol SAMs on Au. In these cases, the indentation depths have been very shallow being only of 0.5-1.5 nm [5,6,12].…”

Section: Introductionmentioning

confidence: 97%

“…From applications point of view, it is crucial to know the mechanical properties of SAMs [1,2,[4][5][6][7][8][9][10][11][12]. Furthermore, statistical evaluation of the experimental data is increasingly needed in mechanical testing as size effects and statistical variation of data are getting more prominent with decreasing dimensions [13].…”

Section: Introductionmentioning

confidence: 99%

Conventional Nanoindentation in Self‐Assembled Monolayers Deposited on Gold and Silver Substrates

Costelle

Lind

Jalkanen

et al. 2012

Journal of Nanomaterials

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Self-assembled monolayers (SAMs) are promising materials for micromechanical applications. However, characterization of mechanical properties of monolayers is challenging for standard nanoindentation, and new efficient analysis techniques are needed. Hereby, a conventional nanoindentation method has been combined in a unique way with efficient data analysis based on consumed energy calculation and load-displacement data. The procedure has been applied on SAMs of 4,4′-biphenyldithiol (BPDT) on Au, 1-tetradecanethiol (TDT), and 1-hexadecanethiol (HDT) on Au and Ag substrates being the first study where SAMs of the same thiols on different substrates are analyzed by nanoindentation providing a new insight into the substrate effects. Unlike TDT and HDT SAMs, which are found to strongly enhance the homogeneity and stiffness of the underlying substrate, the BPDT covered Au substrate appears softer in mechanical response. In the case of TDT and HDT SAMs on Ag the structures are softer showing also faster relaxation than the corresponding structures on Au substrate. The proposed procedure enables a fast and efficient way of assessing the complex behaviour of SAM modified substrates. As a consequence, the results are relevant to practical issues dependent on layer activity and toughness.

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“…In the DPN technique, an atomic force microscope (AFM) tip is used to deliver desired molecules (such as self-assembled monolayers (SAMs) [1], proteins [2,3], polymers [4], and inorganic materials [5,6]) to the surface via a solvent meniscus, which naturally forms in the ambient atmosphere. The tip is used as a nanoscale pen, allowing high-resolution patterning with a number of molecular inks on a variety of substrates [7][8][9][10][11]. Several molecular inks can be formed or aligned on a substrate by the tip because AFM can control the position of deposition.…”

Section: Introductionmentioning

confidence: 99%

Effect of chain length of self-assembled monolayers in dip-pen nanolithography using molecular dynamics simulations

Fang

Lin

2011

Journal of Colloid and Interface Science

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Interface dynamics and mechanisms of nanoindented alkanethiol self-assembled monolayers using molecular simulations

Cited by 12 publications

References 49 publications

Mechanical characterization of nanoporous Au modified with self-assembled monolayers

Mechanical characterization of nanoporous Au modified with self-assembled monolayers

Conventional Nanoindentation in Self‐Assembled Monolayers Deposited on Gold and Silver Substrates

Effect of chain length of self-assembled monolayers in dip-pen nanolithography using molecular dynamics simulations

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