Chemically‐Linked Heterostructures of Palladium Nanosheets and 2H‐MoS<sub>2</sub>
The burgeoning field of 2D heterostructures targets the combination of 2D materials with 3D, 1D, or 0D nanomaterials. Among the most popular 2D materials, the 2H polytype of molybdenum disulfide (MoS<sub>2</sub>) features a well-defined bandgap that becomes direct at the monolayer level, which can be exploited for photodetection. A notable limitation of 2H-MoS<sub>2</sub> is its curtailed absorbance beyond the visible range. Here, a covalently-linked Pd nanosheet (PdNS)/functionalized MoS<sub>2</sub> (f-MoS<sub>2</sub>) heterostructure is introduced, leveraging PdNS infrared-absorbing properties to surmount this constraint. A bifunctional molecule, featuring a maleimide for attachment to MoS<sub>2</sub> and a phenyl bromide for connection to PdNS, enables the synthesis of the heterostructure. Comprehensive spectroscopic and microscopic characterization shed light on the structure of PdNS@f-MoS<sub>2</sub> and the electronic interaction between its components. Prototype devices show an enhancement in the width and intensity of the optoelectronic response of PdNS@f-MoS<sub>2</sub> in the infrared, up to 1700 nm. In comparison, a van der Waals heterostructure with the same components shows poorer photoresponse. The results prove that the covalent linkage of metal nanostructures to 2D materials is a promising approach to build mixed-dimensional heterostructures.
Authors
- Simón Hettler (ORCID: https://orcid.org/0000-0002-9102-7895)
- Vasileios Balos (ORCID: https://orcid.org/0000-0001-7606-6653)
- Juan Cabanillas‐González (ORCID: https://orcid.org/0000-0002-9926-3833)
- Víctor Vega‐Mayoral (ORCID: https://orcid.org/0000-0001-8626-0775)
- Thomas Pucher (ORCID: https://orcid.org/0009-0005-2100-8241)
- Víctor Sebastián-Pérez (ORCID: https://orcid.org/0000-0002-8248-4496)
- Ramiro Quirós‐Ovies (ORCID: https://orcid.org/0000-0003-4569-183X)
- Sergio Aina (ORCID: https://orcid.org/0000-0002-2866-9369)
- Andrés Castellanos-Gómez (ORCID: https://orcid.org/0000-0002-3384-3405)
- Pablo Bastante (ORCID: https://orcid.org/0000-0001-6460-9892)
- Raúl Arenal (ORCID: https://orcid.org/0000-0002-2071-9093)
- Emilio M. Pérez (ORCID: https://orcid.org/0000-0002-8739-2777)
- Jesús Santamarı́a
Institutions
- Universidad de Zaragoza (ES)
- IMDEA Nanoscience (ES)
- Fundacion Agencia Aragonesa para la Investigacion y el Desarrollo (ES)
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (ES)
- Instituto de Ciencia de Materiales de Madrid (ES)
- Instituto de Nanociencia y Materiales de Aragón (ES)
- Universidad Autónoma de Madrid (ES)
Publication Details
- Journal
- Small
- Published
- 2024-12-12
- DOI
- https://doi.org/10.1002/smll.202406030
- Citations
- 2
- Primary Topic
- 2D Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.23
Funders
- Comunidad de Madrid
- Ministerio de Ciencia, Innovación y Universidades
- European Commission
- Ministerio de Ciencia e Innovación
- Centro de Investigación Biomédica en Red en Bioingeniería, Biomateriales y Nanomedicina
- Universidad de Zaragoza
- Gobierno de Aragón
- Instituto de Salud Carlos III
- European Regional Development Fund
- Agencia Estatal de Investigación
- H2020 Marie Skłodowska-Curie Actions