Donega Research Group

Dr. Celso de Mello Donega is an Associate Professor in the group Condensed Matter and Interfaces.

Condensed Matter and Interfaces is part of the Debye Institute for Nanomaterials Science at Utrecht University.

His research is focused on the chemistry and optoelectronic properties of nanomaterials, with particular emphasis on colloidal nanocrystals and heteronanocrystals.

Chemistry and Photophysics of Colloidal Nanomaterials

 

Colloidal nanocrystals (NCs) can be regarded as solution-grown inorganic-organic hybrid nanomaterials, as they consist of inorganic particles that are coated with a layer of organic ligand molecules. The hybrid nature of these nanostructures provides great flexibility in engineering their properties. The nanoscale dimensions of the NCs give rise to remarkable size- and shape-dependent properties that can be further engineered by controlling their composition. The NC can consist of a single material (pure or doped) or be heterostructured, i.e., comprise two or more different materials joined by heterointerfaces. This offers the possibility of tailoring the electron-hole wavefunction overlap, which allows a remarkable degree of control over nanoscale excitons in NCs. Moreover, the organic layer opens up the possibility of surface chemistry manipulation, making it possible to tailor a number of properties. These features have turned colloidal NCs into promising materials for a number of applications (e.g., optoelectronics, photonics, spintronics, catalysis, solar energy conversion, thermoelectrics, sensors and biomedical applications), and opened up an interesting field of multidisciplinary research.

News

Contact Information:

Condensed Matter and Interfaces
P. O. Box 80.000
3508 TA UTRECHT
The Netherlands

Visiting address:

Ornstein Laboratory, Princetonplein 1, Utrecht
Phone: +31 30-2532226

e-mail: c.demello-donega@uu.nl

Nanoparticles

Workhorses of Nanoscience

Celso de Mello Donega (Editor)

ISBN: 978-3-662-44822-9 (Print) 978-3-662-44823-6 (Online)

· Useful for graduate students with additional exercises

· Presents new potential applications of Nanomaterials

· Provides the essential background of the field

 

“Excited State Dynamics in Colloidal Semiconductor Nanocrystals”

“Prospects of Colloidal Copper Chalcogenide Nanocrystals”

Copper chalcogenide NCs are promising alternatives to conventional NCs.  Recent advances have further extended the control over their synthesis, paving the way toward a plethora of complex multinary Cu-chalcogenide hetero-NCs with tailored properties

Read our review in the special issue of ChemPhysChem “Beyond Conventional Quantum Dots” ChemPhysChem 17 (2016) 559 –581.

Read our review in the special issue of Topics in Current Chemistry (Z) 374 (2016) 58. (open access)

Read our perspective paper in the Journal of Physics Chemistry Letters (2017), 8, 40774090 (open access)

“Ultrathin One- and Two-Dimensional Colloidal Semiconductor Nanocrystals: Pushing Quantum Confinement to the Limit

Highly Luminescent Water-Dispersible NIR-Emitting Wurtzite CuInS2/ZnS Core/Shell Colloidal Quantum Dots, Chemistry of  Materials 2017, 29, 49404951 (open access)

Highly Emissive Divalent-Ion-Doped Colloidal CsPb1xMxBr3 Perovskite Nanocrystals through Cation Exchange, Journal of the American Chemical Society 2017, 139, 40874097 (open access)

Size-Dependent Band-Gap and Molar Absorption Coefficients of Colloidal CuInS2 Quantum Dots, ACS Nano (2018), DOI: 10.1021/acsnano.8b03641 (open access)

Interplay Between Surface Chemistry, Precursor Reactivity and Temperature Determines Outcome of ZnS Shelling Reactions on CuInS2 Nanocrystals Chemistry of Materials 30 (2018) 2400-2413.

(open access)

Anisotropic 2D Cu2-xSe Nanocrystals from Dodecaneselenol and their Conversion to CdSe and CuInSe2 Nanoparticles, Chemistry of Materials 30 (2018) 3836-3846. (open access)

NIR-Emitting CuInS2/ZnS Dot-in-Rod Colloidal Heteronanorods by Seeded Growth, Journal of the American Chemical Society 140 (2018) 5755-5763. (Supplementary Journal Cover) (open access)