Fabrication and characterization of functional metallic and mixed metal - semiconductor nanocrystal aerogels
Final Report Abstract
Aerogels are unique solid materials with extremely low densities, high porosity, and large inner surface area. They combine the chemical and physical properties of nanomaterials with those of the macroscale and may integrate the specific properties of the various constituents in one resulting material, making aerogels very attractive in various applications such as (electro-) catalysis, thermoelectrics, and sensors. In this project we have developed new approaches to the formation of mixed aerogels based on various combinations of semiconductor and noble metal nanoparticles. The aerogels were characterized by a variety of microscopic, spectroscopic and analytical methods. Processes of energy and electronic transfer are investigated and described. For various aerogel systems, formation mechanisms are elucidated. Application potential as optical sensors, colour conversion materials and electrocatalysts is demonstrated.
Publications
- Colloidal Nanocrystal-Based Gels and Aerogels: Material Aspects and Application Perspectives. J. Phys. Chem. Lett. 2012, 3 (1), 8- 17
Gaponik, N.; Herrmann, A.-K.; Eychmüller, A.
(See online at https://doi.org/10.1021/jz201357r) - High-Performance Electrocatalysis on Palladium Aerogels. Angew. Chem., Int. Ed. 2012, 51 (23), 5743-5747
Liu, W.; Herrmann, A.-K.; Geiger, D.; Borchardt, L.; Simon, F.; Kaskel, S.; Gaponik, N.; Eychmüller, A.
(See online at https://doi.org/10.1002/anie.201108575) - Quantum-Dot-Based (Aero)gels: Control of the Optical Properties. J. Phys. Chem. Lett. 2012, 3 (16), 2188-2193
Wolf, A.; Lesnyak, V.; Gaponik, N.; Eychmüller, A.
(See online at https://doi.org/10.1021/jz300726n) - Bimetallic aerogels: high-performance electrocatalysts for the oxygen reduction reaction. Angew. Chem., Int. Ed. 2013, 52 (37), 9849-9852
Liu, W.; Rodriguez, P.; Borchardt, L.; Foelske, A.; Yuan, J.; Herrmann, A.-K.; Geiger, D.; Zheng, Z.; Kaskel, S.; Gaponik, N.; Koetz, R.; Schmidt, T. J.; Eychmüller, A.
(See online at https://doi.org/10.1002/anie.201303109) - Mixed Aerogels from Au and CdTe Nanoparticles. Adv. Funct. Mater. 2013, 23 (15), 1903-1911
Hendel, T.; Lesnyak, V.; Kühn, L.; Herrmann, A.-K.; Bigall, N. C.; Borchardt, L.; Kaskel, S.; Gaponik, N.; Eychmüller, A.
- Multimetallic Aerogels by Template-Free Self-Assembly of Au, Ag, Pt, and Pd Nanoparticles. Chem. Mater. 2014, 26 (2), 1074-1083
Herrmann, A.-K.; Formanek, P.; Borchardt, L.; Klose, M.; Giebeler, L.; Eckert, J.; Kaskel, S.; Gaponik, N.; Eychmüller, A.
(See online at https://doi.org/10.1021/cm4033258) - 3D assembly of silica encapsulated semiconductor nanocrystals. Nanoscale 2015, 7 (29), 12713-12721
Rengers, C.; Voitekhovich, S. V.; Kittler, S.; Wolf, A.; Adam, M.; Gaponik, N.; Kaskel, S.; Eychmueller, A.
(See online at https://doi.org/10.1039/c5nr01880c) - Noble Metal Aerogels-Synthesis, Characterization, and Application as Electrocatalysts. Acc. Chem. Res. 2015, 48 (2), 154-162
Liu, W.; Herrmann, A.-K.; Bigall, N. C.; Rodriguez, P.; Wen, D.; Oezaslan, M.; Schmidt, T. J.; Gaponik, N.; Eychmueller, A.
(See online at https://doi.org/10.1021/ar500237c) - Gold Aerogels: Three-Dimensional Assembly of Nanoparticles and Their Use as Electrocatalytic Interfaces. ACS Nano 2016, 10 (2), 2559-2567
Wen, D.; Liu, W.; Haubold, D.; Zhu, C.; Oschatz, M.; Holzschuh, M.; Wolf, A.; Simon, F.; Kaskel, S.; Eychmüller, A.
(See online at https://doi.org/10.1021/acsnano.5b07505)
