Mapping the electrostatic force field of single molecules from high-resolution scanning probe images

Hapala, Prokop; Švec, Martin; Stetsovych, Oleksandr; Heijden, Nadine J. van der; Ondráček, Martin; Lit, Joost van der; Mutombo, Pingo; Swart, Ingmar; Jelı́nek, Pavel

doi:10.1038/ncomms11560

Cited by 108 publications

(155 citation statements)

References 61 publications

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“…From DFT calculations the lateral stretching in the graphene network induced by the substitutional dopant is only about 1% in compression to the nearest-neighbor distance. Thus these distortions are imaging artifacts and are most likely due to the electrostatic interaction between the dopant atom, which has a partial positive charge, and the dipole moment of the tip [42,43,47,48]. A Bader charge analysis shows that the N atom has a charge of 1.27e, where 73% of that charge is extracted from the 3 neighboring C atoms donating 0.3e each to the N atom.…”

Section: Referencementioning

confidence: 99%

Recognizing nitrogen dopant atoms in graphene using atomic force microscopy

Heijden

Smith

Calogero³

et al. 2016

Phys. Rev. B

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Section: Referencementioning

confidence: 99%

Recognizing nitrogen dopant atoms in graphene using atomic force microscopy

Heijden

Smith

Calogero³

et al. 2016

Phys. Rev. B

Self Cite

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“…First, organic molecules can prompt doping effects in 2D materials16171819, causing local modifications of their surface potential202122. Second, these molecules form ordered 2D crystalline structures when physisorbed on graphene and other 2D materials23242526272829303132333435.…”

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confidence: 99%

Periodic potentials in hybrid van der Waals heterostructures formed by supramolecular lattices on graphene

et al. 2017

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The rise of 2D materials made it possible to form heterostructures held together by weak interplanar van der Waals interactions. Within such van der Waals heterostructures, the occurrence of 2D periodic potentials significantly modifies the electronic structure of single sheets within the stack, therefore modulating the material properties. However, these periodic potentials are determined by the mechanical alignment of adjacent 2D materials, which is cumbersome and time-consuming. Here we show that programmable 1D periodic potentials extending over areas exceeding 104 nm2 and stable at ambient conditions arise when graphene is covered by a self-assembled supramolecular lattice. The amplitude and sign of the potential can be modified without altering its periodicity by employing photoreactive molecules or their reaction products. In this regard, the supramolecular lattice/graphene bilayer represents the hybrid analogue of fully inorganic van der Waals heterostructures, highlighting the rich prospects that molecular design offers to create ad hoc materials.

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“…SPM with electrostatic field microscope (EFM) function allows the measurement of electrostatic field distribution25. The line-profile analysis path was marked by black line simultaneously in Fig.…”

Section: Resultsmentioning

confidence: 99%

Highly sensitive H2S sensors based on Cu2O/Co3O4 nano/microstructure heteroarrays at and below room temperature

Cui

Zhang

Chen

et al. 2017

Sci Rep

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Gas sensors with high sensitivity at and below room temperature, especially below freezing temperature, have been expected for practical application. The lower working temperature of gas sensor is better for the manufacturability, security and environmental protection. Herein, we propose a H2S gas sensor with high sensitivity at and below room temperature, even as low as −30 °C, based on Cu2O/Co3O4 nano/microstructure heteroarrays prepared by 2D electrodeposition technique. This heteroarray was designed to be a multi-barrier system, and which was confirmed by transmission electron microscopy, scanning electron microscopy, X-ray photoelectron spectroscopy and scanning probe microscopy. The sensor demonstrates excellent sensitivity, sub-ppm lever detection, fast response, and high activity at low temperature. The enhanced sensing property of sensor was also discussed with the Cu2O/Co3O4 p-p heterojunction barrier modulation and Cu2S conductance channel. We realize the detection of the noxious H2S gas at ultra-low temperature in a more security and environmental protection way.

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Mapping the electrostatic force field of single molecules from high-resolution scanning probe images

Cited by 108 publications

References 61 publications

Recognizing nitrogen dopant atoms in graphene using atomic force microscopy

Recognizing nitrogen dopant atoms in graphene using atomic force microscopy

Periodic potentials in hybrid van der Waals heterostructures formed by supramolecular lattices on graphene

Highly sensitive H2S sensors based on Cu2O/Co3O4 nano/microstructure heteroarrays at and below room temperature

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