Gold modified cadmium sulfide aerogels

Gill, Simerjeet K.; Brown, Preston; Hope‐Weeks, Louisa J.

doi:10.1007/s10971-010-2325-3

Cited by 25 publications

(33 citation statements)

References 41 publications

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“…[185,186] They already started with either Au-o rA g-modified CdS nanoparticles that were assembled into gel structures by the addition of an oxidizing agent. [185,186] They already started with either Au-o rA g-modified CdS nanoparticles that were assembled into gel structures by the addition of an oxidizing agent.…”

Section: Gels From Hybrid Nanostructuresmentioning

confidence: 99%

“…Ad ifferent approach to metal/semiconductor hybrid aerogels was reported by the Hope-Weeks group. [185,186] They already started with either Au-o rA g-modified CdS nanoparticles that were assembled into gel structures by the addition of an oxidizing agent. Them etal content was found to have as ubstantial influence on the emission properties as well as on the gel-formation kinetics.…”

Section: Gels From Hybrid Nanostructuresmentioning

confidence: 99%

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Modern Inorganic Aerogels

et al. 2017

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Essentially, the term aerogel describes a special geometric structure of matter. It is neither limited to any material nor to any synthesis procedure. Hence, the possible variety of materials and therefore the multitude of their applications are almost unbounded. In fact, the same applies for nanoparticles. These are also just defined by their geometrical properties. In the past few decades nano-sized materials have been intensively studied and possible applications appeared in nearly all areas of natural sciences. To date a large variety of metal, semiconductor, oxide, and other nanoparticles are available from colloidal synthesis. However, for many applications of these materials an assembly into macroscopic structures is needed. Here we present a comprehensive picture of the developments that enabled the fusion of the colloidal nanoparticle and the aerogel world. This became possible by the controlled destabilization of pre-formed nanoparticles, which leads to their assembly into three-dimensional macroscopic networks. This revolutionary approach makes it possible to use precisely controlled nanoparticles as building blocks for macroscopic porous structures with programmable properties.

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Section: Gels From Hybrid Nanostructuresmentioning

confidence: 99%

Section: Gels From Hybrid Nanostructuresmentioning

confidence: 99%

Modern Inorganic Aerogels

et al. 2017

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“…Hybrid Au/CdS aerogels derived from Au‐modified CdS NCs have been reported to exhibit a progressive red shifting and PL quenching effects with increasing Au content . However, gelation of a mixed sol composed of Au and semiconductor NCs provides more opportunities for optimizing the intermixing of their electronic states.…”

Section: Hybrid Metal/semiconductor Hierarchical Aerogelsmentioning

confidence: 99%

Emerging Hierarchical Aerogels: Self‐Assembly of Metal and Semiconductor Nanocrystals

et al. 2018

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Aerogels assembled from colloidal metal or semiconductor nanocrystals (NCs) feature large surface area, ultralow density, and high porosity, thus rendering them attractive in various applications, such as catalysis, sensors, energy storage, and electronic devices. Morphological and structural modification of the aerogel backbones while maintaining the aerogel properties enables a second stage of the aerogel research, which is defined as hierarchical aerogels. Different from the conventional aerogels with nanowire-like backbones, those hierarchical aerogels are generally comprised of at least two levels of architectures, i.e., an interconnected porous structure on the macroscale and a specially designed configuration at local backbones at the nanoscale. This combination "locks in" the inherent properties of the NCs, so that the beneficial genes obtained by nanoengineering are retained in the resulting monolithic hierarchical aerogels. Herein, groundbreaking advances in the design, synthesis, and physicochemical properties of the hierarchical aerogels are reviewed and organized in three sections: i) pure metallic hierarchical aerogels, ii) semiconductor hierarchical aerogels, and iii) metal/semiconductor hybrid hierarchical aerogels. This report aims to define and demonstrate the concept, potential, and challenges of the hierarchical aerogels, thereby providing a perspective on the further development of these materials.

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“…[185,186] Darin gehen sie von bereits Au-oder Ag-modifizierten CdS-Nanopartikeln aus,d ie durch Versetzen mit einem Oxidationsmittel in Gelstrukturen überführt werden. [185,186] Darin gehen sie von bereits Au-oder Ag-modifizierten CdS-Nanopartikeln aus,d ie durch Versetzen mit einem Oxidationsmittel in Gelstrukturen überführt werden.…”

Section: Gele Aus Hybridnanostrukturenunclassified

“…Ein anderer Ansatz fürMetall/Halbleiter-Hybridaerogele wurde von Hope-Weeks und Mitarbeitern beschrieben. [185,186] Darin gehen sie von bereits Au-oder Ag-modifizierten CdS-Nanopartikeln aus,d ie durch Versetzen mit einem Oxidationsmittel in Gelstrukturen überführt werden. Der Metallanteil hatte dabei einen substanziellen Einfluss sowohl auf die Emissionseigenschaften als auch auf die Kinetik der Gelbildung.…”

Section: Gele Aus Hybridnanostrukturenunclassified

Moderne Anorganische Aerogele

et al. 2017

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Der Begriff Aerogel beschreibt im Wesentlichen eine besondere geometrische Struktur der Materie, die materialunabhängig ist und keinem speziellen Syntheseverfahren unterliegt. Grundsätzlich können daher Aerogele aus unzähligen Materialien bestehen, wodurch die Anwendungsmöglichkeiten nahezu unbegrenzt sind. Dasselbe trifft auf Nanopartikel zu. Diese werden ebenso durch ihre geometrischen Eigenschaften definiert. In den letzten Jahrzehnten standen daher nanoskalige Materialien im Fokus der Forschung, und es entwickelten sich mögliche Anwendungen in vielen naturwissenschaftlichen Bereichen. Heute ist eine Vielzahl an Metall‐, Halbleiter‐, Oxid‐ und anderen Nanopartikeln durch kolloidale Synthesen zugänglich. Dennoch ist es für eine Anwendung oft notwendig, dass diese Materialien zuvor in makroskopische Strukturen angeordnet werden. Dieser Aufsatz gibt eine ausführliche Übersicht über die Entwicklung, die die Welt der kolloidalen Nanopartikel und der Aerogele miteinander vereint. Ermöglicht wurde dies durch die kontrollierte Destabilisierung der vorab gebildeten Nanopartikel, die zu einer Anordnung der Nanopartikel zu einem dreidimensionalen, makroskopischen Netzwerk führt. Dieses revolutionäre Konzept verleiht die Möglichkeit, präzise kontrollierte Nanopartikel als Grundbausteine für makroskopische, poröse Strukturen mit einstellbaren Eigenschaften zu nutzen.

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Gold modified cadmium sulfide aerogels

Cited by 25 publications

References 41 publications

Modern Inorganic Aerogels

Modern Inorganic Aerogels

Emerging Hierarchical Aerogels: Self‐Assembly of Metal and Semiconductor Nanocrystals

Moderne Anorganische Aerogele

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