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February 13, 2023
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Nearly-freestanding supramolecular assembly with tunable structural properties

Publicated to: Scientific Reports. 13 (1): e2068- - 2023-12-01 13(1), DOI: 10.1038/s41598-023-28865-w

Authors:

Caruso, T; De Luca, O; Melfi, N; Policicchio, A; Pisarra, M; Godbert, N; Aiello, I; Giorno, E; Pacile, D; Moras, P; Martin, F; Rudolf, P; Agostino, RG; Papagno, M
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Affiliations

CNR ISM CNR, Ist Struttura Mat, I-34149 Trieste, Italy - Author
Condensed Matter Phys Ctr IFIMAC, Madrid 28049, Spain - Author
Gruppo Nazionale di Struttura della Materia - Author
IMDEA Nanociencia , IFIMAC-Condensed Matter Physics Center , Universidad Autónoma de Madrid - Author
IMDEA Nanociencia , Universidad Autónoma de Madrid , Istituto Nazionale di Fisica Nucleare - INFN - Author
Inst IMDEA Nanociencia, Calle Faraday 9, Madrid 28049, Spain - Author
Rijksuniversiteit Groningen - Author
Sez LNF, INFN, Grp Collegato Cosenza, Cubo 31C, I-87036 Arcavacata Di Rende, CS, Italy - Author
Univ Autonoma Madrid, Dept Quim, Modulo 13, Madrid 28049, Spain - Author
Univ Calabria, Ctr Eccellenza CEMIF CAL, Dipartimento Chim & Tecnol Chim, Unita INSTM Calabria,LASCAMM CR INSTM,MAT InLAB La, I-87036 Arcavacata Di Rende, CS, Italy - Author
Univ Calabria, Dipartimento Fis, CNR Nanotec, UoS Cosenza, I-87036 Arcavacata Di Rende, CS, Italy - Author
Univ Calabria, Dipartimento Fis, I-87036 Arcavacata Di Rende, CS, Italy - Author
Univ Calabria, Lab Spettroscopia Avanzata Mat, STAR IR, Via Tito Flavio, I-87036 Arcavacata Di Rende, CS, Italy - Author
Univ Calabria, STAR Lab, LPM Lab Preparaz Materiali, Via Tito Flavio, I-28049 Arcavacata Di Rende, CS, Italy - Author
Univ Groningen, Zernike Inst Adv Mat, NL-9747 Groningen, Netherlands - Author
Universitá della Calabria - Author
Università della Calabria , Rijksuniversiteit Groningen - Author
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Abstract

The synthesis and design of two-dimensional supramolecular assemblies with specific functionalities is one of the principal goals of the emerging field of molecule-based electronics, which is relevant for many technological applications. Although a large number of molecular assemblies have been already investigated, engineering uniform and highly ordered two-dimensional molecular assemblies is still a challenge. Here we report on a novel approach to prepare wide highly crystalline molecular assemblies with tunable structural properties. We make use of the high-reactivity of the carboxylic acid functional moiety and of the predictable structural features of non-polar alkane chains to synthesize 2D supramolecular assemblies of 4-(decyloxy)benzoic acid (4DBA;C17H26O3) on a Au(111) surface. By means of scanning tunneling microscopy, density functional theory calculations and photoemission spectroscopy, we demonstrate that these molecules form a self-limited highly ordered and defect-free two-dimensional single-layer film of micrometer-size, which exhibits a nearly-freestanding character. We prove that by changing the length of the alkoxy chain it is possible to modify in a controlled way the molecular density of the “floating” overlayer without affecting the molecular assembly. This system is especially suitable for engineering molecular assemblies because it represents one of the few 2D molecular arrays with specific functionality where the structural properties can be tuned in a controlled way, while preserving the molecular pattern.
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Keywords

adsorptionau(111) surfacebenzenebenzoic-acidgaussian-type basismetalmolecular-orbital methodstotal-energy calculationstrimesic acidScanning-tunneling-microscopy

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal Scientific Reports due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2023, it was in position 25/134, thus managing to position itself as a Q1 (Primer Cuartil), in the category Multidisciplinary Sciences.

Independientemente del impacto esperado determinado por el canal de difusión, es importante destacar el impacto real observado de la propia aportación.

Según las diferentes agencias de indexación, el número de citas acumuladas por esta publicación hasta la fecha 2026-01-20:

  • WoS: 2
  • Scopus: 2
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Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2026-01-20:

  • The use, from an academic perspective evidenced by the Altmetric agency indicator referring to aggregations made by the personal bibliographic manager Mendeley, gives us a total of: 6.
  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 6 (PlumX).

With a more dissemination-oriented intent and targeting more general audiences, we can observe other more global scores such as:

  • The Total Score from Altmetric: 1.
  • The number of mentions on the social network X (formerly Twitter): 3 (Altmetric).

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

  • The work has been submitted to a journal whose editorial policy allows open Open Access publication.
  • Assignment of a Handle/URN as an identifier within the deposit in the Institutional Repository: https://repositorio.uam.es/handle/10486/706990
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Leadership analysis of institutional authors

This work has been carried out with international collaboration, specifically with researchers from: Italy; Netherlands.

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