An STM study of molecular exchange processes in organic thin film growth

Gallego, José M.; Écija, David; Martín, Nazario; Otero, Roberto; Miranda, Rodolfo

doi:10.1039/c4cc03656e

Cited by 13 publications

(20 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In analogy to molecular exchange and preferential adsorption processes after sequential deposition of two different ILs on Ag(111) [81,82], exchange processes have also been reported for organic bilayers on metals involving porphyrins and related aromatic molecules [156][157][158][159][160][161][162][163][164]. These investigations highlight the importance of the strength of the organic-metal interaction and its correlation to the stability and arrangement in stacked multilayer architectures [156,161,162,[164][165][166][167][168][169][170].…”

Section: Replacement Of Ionic Liquids By Porphyrins At Metal Interfacesmentioning

confidence: 72%

Ultrathin ionic liquid films on metal surfaces: adsorption, growth, stability and exchange phenomena

Lexow

Maier

Steinrück

2020

Advances in Physics: X

View full text Add to dashboard Cite

The interface of ionic liquids (ILs) with solid surfaces is of pivotal interest for many applications, ranging from sensors, lubrication, separation technology, and electronics to electrochemistry and catalysis. We present a short review on ultrathin layers of ionic liquids on metal surfaces using a surface science approach. We mainly focus on specific examples of imidazolium-based ionic liquids on Ag(111) and Au(111) studied by angle-resolved X-ray photoelectron spectroscopy, and relate the obtained results to existing literature. We address a variety of phenomena on the molecular level, namely, (i) the adsorption, growth and wetting behavior of ILs, (ii) the thermal stability and desorption of ILs, (iii) exchange processes of anions and cations at the IL/solid interface, and (iv) the replacement of ILs from the IL/solid interface by porphyrins.

show abstract

Section: Replacement Of Ionic Liquids By Porphyrins At Metal Interfacesmentioning

confidence: 72%

Ultrathin ionic liquid films on metal surfaces: adsorption, growth, stability and exchange phenomena

Lexow

Maier

Steinrück

2020

Advances in Physics: X

View full text Add to dashboard Cite

show abstract

“…Conversely, the presence of a second molecular layer may strengthen the molecule–substrate interaction by providing additional charge screening, as was shown in the case of CuPc/PTCDA/Ag(111) . However, apart from these well‐studied examples of epitaxial growth, interdiffusion of the molecular species at the hetero‐layer interface is the rule rather than the exception, even for systems that do not show bulk miscibility. This lack of molecular scale control at organic–organic interfaces calls for the development of new approaches for growing interfaces with molecular scale quality.…”

Section: Discussionmentioning

confidence: 98%

Multi‐Component Organic Layers on Metal Substrates

et al. 2015

View full text Add to dashboard Cite

Increasingly high hopes are being placed on organic semiconductors for a variety of applications. Progress along these lines, however, requires the design and growth of increasingly complex systems with well-defined structural and electronic properties. These issues have been studied and reviewed extensively in single-component layers, but the focus is gradually shifting towards more complex and functional multi-component assemblies such as donor-acceptor networks. These blends show different properties from those of the corresponding single-component layers, and the understanding on how these properties depend on the different supramolecular environment of multi-component assemblies is crucial for the advancement of organic devices. Here, our understanding of two-dimensional multi-component layers on solid substrates is reviewed. Regarding the structure, the driving forces behind the self-assembly of these systems are described. Regarding the electronic properties, recent insights into how these are affected as the molecule's supramolecular environment changes are explained. Key information for the design and controlled growth of complex, functional multicomponent structures by self-assembly is summarized.

show abstract

“…Gallego et al. reported molecular exchange processes in organic thin‐film growth with the employment of a fullerene derivative (PCBM) deposited on top of the layer of a TTF derivative (exTTF) previously deposited on Au(111) . The preferential interaction with the gold substrate induces the exchange of PCBM molecules with the exTTF ML, expelling exTTF molecules to the outer surface, but this exchange process is forbidden if the thickness of the exTTF layer is more than 1 ML, when the larger surface energy of PCBM leads to the growth of 3D islands on exTTF.…”

Section: Hetero‐samtsmentioning

confidence: 99%

Organic Multilayer Films Studied by Scanning Tunneling Microscopy

Wang

2017

ChemPhysChem

View full text Add to dashboard Cite

This Minireview focuses exclusively on work with scanning tunneling microscopy to study the self-assembled multilayer films (SAMTs) of organic molecules. The π-conjugated organic molecules form different structures within different monolayers on various substrates. The interplay between molecule-substrate and intermolecular interactions plays a key role in determining the stacking mode of organic multilayer films. Different substrates strongly influence the organic-film growth and electronic properties of the organic molecules. Geometric and electronic structures of SAMTs are important factors that may determine device performance. In addition to the inorganic interface, this Minireview addresses the organic-organic interface. Homo- and hetero-SAMTs of organic molecules are also considered. The subtle interplay between structural and electronic characteristics, on one hand, and functionality and reactivity, on the other hand, are highlighted.

show abstract

An STM study of molecular exchange processes in organic thin film growth

Cited by 13 publications

References 40 publications

Ultrathin ionic liquid films on metal surfaces: adsorption, growth, stability and exchange phenomena

Ultrathin ionic liquid films on metal surfaces: adsorption, growth, stability and exchange phenomena

Multi‐Component Organic Layers on Metal Substrates

Organic Multilayer Films Studied by Scanning Tunneling Microscopy

Contact Info

Product

Resources

About