Evolution of Ordered Metal Chalcogenide Architectures through Chemical Transformations

Rivest, Jessy B.; Buonsanti, Raffaella; Pick, Teresa E.; Zhu, Lina; Lim, Eunhee; Clavero, C.; Schaible, Eric; Helms, Brett A.; Milliron, Delia J.

doi:10.1021/ja403071w

Cited by 31 publications

(51 citation statements)

References 21 publications

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“…Poly( N,N -dimethylacrylamide) (PDMA) and copolymers thereof have emerged as superior nanocrystal tethering domains for directing CNF assembly from cationic naked nanocrystals ( Figure 3 ). [ 24,27,29,60 ] In future schemes, related polymer families such as poly(2-oxazolines) [ 71 ] or polypeptoids [ 72 ] might likewise produce similar results.…”

Section: Research Newsmentioning

confidence: 94%

“…[ 24,27,30,[58][59][60][61] In these early studies, CNFs already demonstrated remarkable stability during both chemical and electrochemical transformations. For example, CdSe CNFs undergo sequential cation exchange to Cu 2 Se, Ag 2 Se, and PbSe CNFs without signifi cant framework degradation or loss of order.…”

Section: Research Newsmentioning

confidence: 99%

“…For example, CdSe CNFs undergo sequential cation exchange to Cu 2 Se, Ag 2 Se, and PbSe CNFs without signifi cant framework degradation or loss of order. [ 27 ] Furthermore, metal oxide CNFs show excellent cycling ability and rate performance in electrochemical devices, even when the charging mechanism is based on intercalation, suggesting nanocrystalnanocrystal junctions holding the framework together are fairly robust even when strained at phase or grain boundaries. [ 24,60 ] CNFs therefore represent a versatile material platform to investigate the fundamental transport functions of a broad spectrum of energy-converting devices, including capacitors, batteries, photovoltaics, solar-to-fuel schemes, electrochromics, and ion-transporting membranes.…”

Section: Research Newsmentioning

confidence: 99%

“…To date, the most successful CNF assembly schemes have employed electrostatics as an interfacing strategy. [ 21,22,24,25,[27][28][29][30] Here, the surfaces of the nanocrystal components are ionic in character; both ligandcoated [ 31 ] and ligand-stripped nanocrystals [66][67][68] are suitable in this regard.…”

Section: Research News 2 Engineering the Surfaces Of Colloidal Nanocmentioning

confidence: 99%

“…Not surprisingly, cationic naked nanocrystals have seen the widest use in CNF assembly. [ 24,25,27,28 ] It is likely in the near future that anionic naked nanocrystals will also fi nd a niche in CNF assembly; strategies for their assembly can be informed by related schemes using anionic polyoxometalates as framework components. [ 70 ] …”

Section: Research News 2 Engineering the Surfaces Of Colloidal Nanocmentioning

confidence: 99%

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Colloidal Nanocrystal Frameworks

et al. 2015

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Colloidal nanocrystal frameworks (CNFs) are a modular class of mesostructured porous materials, which are assembled from pre-formed nanocrystal building units using suitably designed block copolymer architecture-directing agents. The functional attributes of these frameworks are determined both by the physiochemical characteristics of the nanocrystal components as well as their ordered arrangements in space. It is noteworthy that their assembly schemes are readily amenable to more than one type of framework component, yielding a multivariate landscape to navigate mesoscale phenomena arising from the coupled interactions of different nanocrystals within the framework. Early reports indicate surprisingly efficient propagation of both matter and energy within and along the surfaces of these frameworks, although there remains much to be learned about the origins of their structural, electronic, and dynamic properties, and how they feed back across multiple length and time scales.

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Section: Research Newsmentioning

confidence: 94%

Section: Research Newsmentioning

confidence: 99%

Section: Research Newsmentioning

confidence: 99%

Section: Research News 2 Engineering the Surfaces Of Colloidal Nanocmentioning

confidence: 99%

Section: Research News 2 Engineering the Surfaces Of Colloidal Nanocmentioning

confidence: 99%

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Colloidal Nanocrystal Frameworks

et al. 2015

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Polymer Micelle Directed Magnetic Cargo Assemblies Towards Spin‐wave Manipulation

Manuguri

Heijden

Nam

et al. 2021

Adv Materials Inter

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Spin‐wave based technologies that use collective oscillation of electrons termed magnons have been proposed for future computing landscapes due to their low energy consumption and high data transfer speeds. Magnonic crystals, materials with magnetic properties periodically varied in space, are central to such technologies. However, they are currently limited by the lithography techniques used for the magnetic patterning. To address this issue, bottom‐up self‐assembly using polymer templates to order magnetic cargo is presented. In this work, block copolymer micelles are used as templates to direct the organization of polyoxometalate (POM) molecules into organized assemblies. The structural organization of these assemblies is evaluated using microscopy and scattering techniques. The organized POM assemblies are demonstrated to modulate spin‐waves excited in permalloy thin films. This work demonstrates the first use of a bottom‐up approach to realize the fabrication of a magnonic assembly at the nanoscale. It further paves the way to achieve magnon‐mediated self‐assembled computing architectures.

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Functionalization of Mesoporous Semiconductor Metal Oxides for Gas Sensing: Recent Advances and Emerging Challenges

et al. 2022

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With the emerging of the Internet of Things, chemiresistive gas sensors have been extensively applied in industrial production, food safety, medical diagnosis, and environment detection, etc. Considerable efforts have been devoted to improving the gas-sensing performance through tailoring the structure, functions, defects and electrical conductivity of sensitive materials. Among the numerous sensitive materials, mesoporous semiconductor metal oxides possess unparalleled properties, including tunable pore size, high specific surface area, abundant metal-oxygen bonds, and rapid mass transfer/diffusion behavior (Knudsen diffusion), which have been regarded as the most potential sensitive materials. Herein, the synthesis strategies for mesoporous metal oxides are overviewed, the classical functionalization techniques of sensitive materials are also systemically summarized as a highlight, including construction of mesoporous structure, regulation of micro-nano structure (i.e., heterojunctions), noble metal sensitization (e.g., Au, Pt, Ag, Pd) and heteroatomic doping (e.g., C, N, Si, S). In addition, the structure-function relationship of sensitive materials has been discussed at molecular-atomic level, especially for the chemical sensitization effect, elucidating the interface adsorption/catalytic mechanism. Moreover, the challenges and perspectives are proposed, which will open a new door for the development of intelligent gas sensor in various applications.

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Evolution of Ordered Metal Chalcogenide Architectures through Chemical Transformations

Cited by 31 publications

References 21 publications

Colloidal Nanocrystal Frameworks

Colloidal Nanocrystal Frameworks

Polymer Micelle Directed Magnetic Cargo Assemblies Towards Spin‐wave Manipulation

Functionalization of Mesoporous Semiconductor Metal Oxides for Gas Sensing: Recent Advances and Emerging Challenges

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