Anchoring of a dye precursor on NiO(001) studied by non-contact atomic force microscopy

Freund, Sara; Hinaut, Antoine; Marinakis, Nathalie; Constable, Edwin C.; Meyer, Ernst; Housecroft, Catherine E.; Glatzel, Thilo

doi:10.3762/bjnano.9.26

Cited by 11 publications

(13 citation statements)

References 69 publications

(52 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fig. 2 shows the frequency-shift signal acquired using the multipass imaging technique [14–15 35–36] clearly showing atomic resolution of the NiO(001) surface. Employing this method, the crystallographic directions of the substrate are resolved with atomic accuracy, and upon comparing them with the large-scale image, one can deduce that the step edges of NiO(001) as well as the observed defects run along the [110] direction (see violet dotted lines in Fig.…”

Section: Resultsmentioning

confidence: 99%

Comparing a porphyrin- and a coumarin-based dye adsorbed on NiO(001)

Freund

Hinaut

Marinakis

et al. 2019

Beilstein J. Nanotechnol.

Self Cite

View full text Add to dashboard Cite

Properties of metal oxides, such as optical absorption, can be influenced through the sensitization with molecular species that absorb visible light. Molecular/solid interfaces of this kind are particularly suited for the development and design of emerging hybrid technologies such as dye-sensitized solar cells. A key optimization parameter for such devices is the choice of the compounds in order to control the direction and the intensity of charge transfer across the interface. Here, the deposition of two different molecular dyes, porphyrin and coumarin, as single-layered islands on a NiO(001) single crystal surface have been studied by means of non-contact atomic force microscopy at room temperature. Comparison of both island types reveals different adsorption and packing of each dye, as well as an opposite charge-transfer direction, which has been quantified by Kelvin probe force microscopy measurements.

show abstract

Section: Resultsmentioning

confidence: 99%

Comparing a porphyrin- and a coumarin-based dye adsorbed on NiO(001)

Freund

Hinaut

Marinakis

et al. 2019

Beilstein J. Nanotechnol.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The search for new organic nonlinear optical materials has been put on a scientific basis only after the establishment of the correlation between their nonlinearity and intramolecular charge transfer processes. The value of the second-order optical nonlinearity is directly connected with dipole moment variations occurring upon excitation of the system [7]. Thus, one of the most important factors is the investigation of the spectroscopic properties of the above mentioned polymers.…”

Section: Methodsmentioning

confidence: 99%

“…The whole set of spectroscopic characteristics (both steady-state and time-resolved) will be measured to get information on charge distribution in ground and excited states of chromophores in such media. The measurements of second-order nonlinear susceptibility will be performed by SHG and electro-optical methods [5][6][7]. In this paper we propose the development of another technique for obtaining high second-order nonlinearities of functionalized polyimides.…”

Section: Methodsmentioning

confidence: 99%

“…A second promising approach is to use high glass transition temperature (T g ) polymers such as polyimides, a category of polymers already well-known in microelectronics, that possess exceptional thermal, mechanical, optical and dielectric properties. The first use of polyimides as NLO materials was in guest-host systems, that is, mixtures of low-molecular weight NLO chromophore molecules with high-molecular weight polyimides [4][5][6][7][8]. However, these systems have shown problems such as low loading density of chromophores and rapid relaxation of poling-induced order.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigations of Novel High-Temperature Resistant Polymers for Electro-Optical Applications in Signal Processing Systems

Prelipceanu¹,

Prelipceanu²,

Paraschiv³

et al. 2019

Symmetry

View full text Add to dashboard Cite

In this paper the novel high-temperature resistant polymers with nonlinear optical properties have been synthesized, characterized and tested for use in electro-optical components with high bit rate optical signal processing systems and for dynamic holography. The characterization that has been reported include the measurement of second-order nonlinear susceptibility by second harmonic generation, UV-VIS spectroscopy, XRD measurement dielectric relaxation, glass transition temperature and molecular weight distribution before and after artificial ageing. Also, we have done AFM investigations and profilometry measurements for stamp patterning layers. The application of the new polyimides for electro-optic devices has been evaluated by creation of thin oriented polymer films on various substrates and preparation of planar and strip waveguides.

show abstract

“…For cytosine monomers, a diffusion barrier of 0.5 eV has been determined 31 , which corresponds to a high mobility at room temperature. Until now, only larger monomers, such as 4,4′-di(4-carboxyphenyl)-6,6′-dimethyl-2,2′-bipyridine on NiO (001), are found to have a reduced mobility on insulators 34 . But in the latter case, due to a strong molecule–molecule interaction, cluster or even larger molecular islands are formed at increased coverage.…”

Section: Introductionmentioning

confidence: 99%

Creating a regular array of metal-complexing molecules on an insulator surface at room temperature

et al. 2020

View full text Add to dashboard Cite

Controlling self-assembled nanostructures on bulk insulators at room temperature is crucial towards the fabrication of future molecular devices, e.g., in the field of nanoelectronics, catalysis and sensor applications. However, at temperatures realistic for operation anchoring individual molecules on electrically insulating support surfaces remains a big challenge. Here, we present the formation of an ordered array of single anchored molecules, dimolybdenum tetraacetate, on the (10.4) plane of calcite (CaCO3). Based on our combined study of atomic force microscopy measurements and density functional theory calculations, we show that the molecules neither diffuse nor rotate at room temperature. The strong anchoring is explained by electrostatic interaction of an ideally size-matched molecule. Especially at high coverage, a hard-sphere repulsion of the molecules and the confinement at the calcite surface drives the molecules to form locally ordered arrays, which is conceptually different from attractive linkers as used in metal-organic frameworks. Our work demonstrates that tailoring the molecule-surface interaction opens up the possibility for anchoring individual metal-complexing molecules into ordered arrays.

show abstract

Anchoring of a dye precursor on NiO(001) studied by non-contact atomic force microscopy

Cited by 11 publications

References 69 publications

Comparing a porphyrin- and a coumarin-based dye adsorbed on NiO(001)

Comparing a porphyrin- and a coumarin-based dye adsorbed on NiO(001)

Investigations of Novel High-Temperature Resistant Polymers for Electro-Optical Applications in Signal Processing Systems

Creating a regular array of metal-complexing molecules on an insulator surface at room temperature

Contact Info

Product

Resources

About