Molecular resolution in dynamic force microscopy: topography and dissipation for weakly interacting systems

Fendrich, M.; Kunstmann, Tobias; Paulkowski, D; Möller, R.

doi:10.1088/0957-4484/18/8/084004

Cited by 20 publications

(19 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The crystallite growth seems to nucleate from the step edges of the KBr substrate and the growth mode is clearly of the Volmer-Weber type, resulting in PTCDA crystallites on top of a clean KBr substrate without any wetting layer. These results are in good agreement with former experiments [10,14] and show that the sample is well prepared. For the investigation of the dissipation behaviour of KBr and PTCDA as a function of temperature, we have performed large area scans with a typical frame size of 1.5 × 1.5 µm 2 .…”

Section: Fig 1(a)supporting

confidence: 93%

See 1 more Smart Citation

Temperature dependence of the energy dissipation in dynamic force microscopy

et al. 2008

View full text Add to dashboard Cite

Abstract. The dissipation of energy in dynamic force microscopy is usually described in terms of an adhesion hysteresis mechanism. This mechanism should become less efficient with increasing temperature. To verify this prediction we have measured topography and dissipation data with dynamic force microscopy in the temperature range from 100 K up to 300 K. We used 3,4,9,10-perylenetetracarboxylic-dianhydride (PTCDA) grown on KBr(001), both materials exhibiting a strong dissipation signal at large frequency shifts. At room temperature, the energy dissipated into the sample (or tip) is 1.9 eV/cycle for PTCDA and 2.7 eV/cycle for KBr, respectively, and is in good agreement with an adhesion hysteresis mechanism. The energy dissipation over the PTCDA surface decreases with increasing temperature yielding a negative temperature coefficient. For the KBr substrate, we find the opposite behaviour: an increase of dissipated energy with increasing temperature. While the negative temperature coefficient in case of PTCDA agrees rather well with the adhesion hysteresis model, the positive slope found for KBr points to a hitherto unknown dissipation mechanism.

show abstract

Section: Fig 1(a)supporting

confidence: 93%

“…That is, considering that our data was taken at γ = −14 fNm 1/2 , the value we find at room temperature is in good agreement with the moleculary resolved data from ref. [14]. From the data shown in fig.…”

Section: Fig 1(a)mentioning

confidence: 99%

Temperature dependence of the energy dissipation in dynamic force microscopy

et al. 2008

View full text Add to dashboard Cite

show abstract

“…PTCDA molecules have been deposited on different substrates such as metallic Cu͑110͒, 33 Cu͑111͒, 34 Ag͑110͒, 35 Ag͑111͒, 35,36 Au͑100͒, 37 Au͑788͒ ͑Ref. 38͒ and Au͑111͒, 20,[37][38][39][40][41][42] nonmetallic KBr͑001͒, 43,44 NaCl, 45,46 on graphene layers, [47][48][49] GaAs͑001͒, 50 Si/Ag͑111͒, 24 and mica. 51 Four structures formed by PTCDA molecules have been observed so far: ͑i͒ herringbone, 20,24,[34][35][36][37][38][41][42][43][44] ͑ii͒ square, 24,33,37,38,41 ͑iii͒ brick wall, 35,47 and ͑iv͒ a more complex hexagonal phase 24 which can be considered as a combination of a herringbone and square phases.…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical analysis of H-bonded supramolecular assemblies of PTCDA molecules

et al. 2010

View full text Add to dashboard Cite

Physics, 81(19), 195412-1-195412-11. [195412]. https://doi.org/10.1103/PhysRevB. 81.195412 Copyright Other than for strictly personal use, it is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license (like Creative Commons).Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. Using a systematic method based on considering all possible hydrogen bond connections between molecules and subsequent density-functional theory ͑DFT͒ calculations, we investigated planar superstructures that the perylene-3,4,9,10-tetracarboxylic-3,4,9,10-dianhydride ͑PTCDA͒ molecules can form in one and two dimensions. Structures studied are mostly based on two molecule unit cells and all assemble in flat periodic arrays. We show that 42 different monolayer structures are possible, which can be split into eight families of distinct structures. A single representative of every family was selected and relaxed using DFT. We find square, herringbone and brick wall phases ͑among others͒ which were already observed on various substrates. Using scanning tunneling microscopy in ultrahigh vacuum, we also observed herringbone and square phases after sublimation of PTCDA molecules on the Au͑111͒ surface at room temperature, the square phase being observed for the first time on this substrate. The square phase appears as a thin stripe separating two herringbone domains and provides a perfect structural matching for them. A similar structural formation serving as a domain wall between two other phases has been recently reported on the same surface formed by melamine molecules ͓F. Silly et al., J. Phys. Chem. C 112, 11476 ͑2008͔͒. Our theoretical analysis helps to account for these and other observed complex structures.

show abstract

“…It is possible that an atomic flipping process occurs on the tip apex due to interaction with the PTCDA molecule, causing the uppermost atom on the tip to change its height relative to the tip surface. Moreover, the measured dissipation for this molecule was about ten times smaller than that obtained in previous experiments using the same type of molecule [34]. This may reflect the different substrates used; the former experiments were carried out using KBr(001) as a substrate.…”

Section: Resultsmentioning

confidence: 62%

“…In addition, a change in the atomic structure of the tip can influence the dissipation. On the other hand, the dissipation depended on which phase or on which part of the molecule [34] the spectroscopy was performed. To resolve these issues, a more detailed lowtemperature investigation in addition to FM-AFM and dissipation images are required.…”

Section: Discussionmentioning

confidence: 99%

Energy Dissipation in Dynamic Force Spectroscopy of PTCDA on Ag-Si(111) .RAD.3*.RAD.3

Vörden

Lange

Möller

2011

e-J. Surf. Sci. Nanotechnol.

View full text Add to dashboard Cite

The energy dissipation of different phases of PTCDA (3,4,9,10-perylene-tetracarboxylic-dianhydride) on AgSi(111) √ 3 × √ 3 was investigated by means of atomic force spectroscopy using a custom-built low-temperature atomic force microscope (LT-AFM). The energy dissipation is due to non-conservative forces between the tip and sample. We present preliminary energy dissipation data measured when the tip was placed above four different PTCDA superstructures. While one of them showed energy dissipation, the others did not. The dissipation process seems to be critically influenced by the junction geometry; a chemical bound between the tip apex and a specific site of the molecular layer might be one channel for the dissipation.

show abstract

Molecular resolution in dynamic force microscopy: topography and dissipation for weakly interacting systems

Cited by 20 publications

References 31 publications

Temperature dependence of the energy dissipation in dynamic force microscopy

Temperature dependence of the energy dissipation in dynamic force microscopy

Experimental and theoretical analysis of H-bonded supramolecular assemblies of PTCDA molecules

Energy Dissipation in Dynamic Force Spectroscopy of PTCDA on Ag-Si(111) .RAD.3*.RAD.3

Contact Info

Product

Resources

About