Monitoring pattern formation in drying and wetting dispersions of gold nanoparticles by ESEM

Kunstmann‐Olsen, Casper; Belić, Domagoj

doi:10.1039/c4fd00270a

Cited by 8 publications

(19 citation statements)

References 54 publications

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“…The behavior of AuNPs functionalized with hydrophilic thiol ligands, containing poly(ethylene)glycol groups was recently revised by Kunstmann-Olsen et al [ 101 ] by means of environmental scanning electron microscopy (ESEM). Self-assembly in patterns was highlighted and the process was elucidated in situ by ESEM during both evaporation and condensation of the dispersant on a variety of substrates, including pre-patterned ones.…”

Section: Hydrophilic and Amphiphilic Ligands Capping Agents For Amentioning

confidence: 99%

Hydrophobic and Hydrophilic Au and Ag Nanoparticles. Breakthroughs and Perspectives

Fratoddi

2017

Nanomaterials

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This review provides a broad look on the recent investigations on the synthesis, characterization and physico-chemical properties of noble metal nanoparticles, mainly gold and silver nanoparticles, stabilized with ligands of different chemical nature. A comprehensive review of the available literature in this field may be far too large and only some selected representative examples will be reported here, together with some recent achievements from our group, that will be discussed in more detail. Many efforts in finding synthetic routes have been performed so far to achieve metal nanoparticles with well-defined size, morphology and stability in different environments, to match the large variety of applications that can be foreseen for these materials. In particular, the synthesis and stabilization of gold and silver nanoparticles together with their properties in different emerging fields of nanomedicine, optics and sensors are reviewed and briefly commented.

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Section: Hydrophilic and Amphiphilic Ligands Capping Agents For Amentioning

confidence: 99%

Hydrophobic and Hydrophilic Au and Ag Nanoparticles. Breakthroughs and Perspectives

Fratoddi

2017

Nanomaterials

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“…In contrast, plasmonic gold nanoparticles (AuNPs) can be colloidally synthesized with high yield and with a very large diversity in morphology (shape, size, aspect ratio). However, the potential of colloidal nanoparticles for solid state devices has been limited due to their tendency to form arbitrary, non-uniform, and/or close-packed aggregates upon assembly onto surfaces 19 . This results in poor control over the nanostructure geometry, with concomitant poor performance of the resulting metastructure and devices.…”

Section: Introductionmentioning

confidence: 99%

Large scale self-assembly of plasmonic nanoparticles on deformed graphene templates

Gole

Yin

Wang

et al. 2021

Sci Rep

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Hierarchical heterostructures of two-dimensional (2D) nanomaterials are versatile platforms for nanoscale optoelectronics. Further coupling of these 2D materials with plasmonic nanostructures, especially in non-close-packed morphologies, imparts new metastructural properties such as increased photosensitivity as well as spectral selectivity and range. However, the integration of plasmonic nanoparticles with 2D materials has largely been limited to lithographic patterning and/or undefined deposition of metallic structures. Here we show that colloidally synthesized zero-dimensional (0D) gold nanoparticles of various sizes can be deterministically self-assembled in highly-ordered, anisotropic, non-close-packed, multi-scale morphologies with templates designed from instability-driven, deformed 2D nanomaterials. The anisotropic plasmonic coupling of the particle arrays exhibits emergent polarization-dependent absorbance in the visible to near-IR regions. Additionally, controllable metasurface arrays of nanoparticles by functionalization with varying polymer brushes modulate the plasmonic coupling between polarization dependent and independent assemblies. This self-assembly method shows potential for bottom-up nanomanufacturing of diverse optoelectronic components and can potentially be adapted to a wide array of nanoscale 0D, 1D, and 2D materials.

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“…Fully dehydrated suspensions (if stored in a humidity- and temperature-controlled environment) are static and fairly stable because the self-organization process is complete. At this point, more invasive endpoint methods, such as scanning electron microscopy (SEM) [ 17 , 18 ], X-ray crystallography, and atomic force microscopy (AFM) [ 19 , 20 ] can be safely applied, all of which can result in high resolution endpoint data. Although some of these techniques (namely SEM and AFM) can, in theory, be carried out in the liquid mode, these techniques require meticulous sample preparation, which is invasive and will interfere with the self-organization process [ 21 ], making real-time, non-invasive visualization of VNPs (and nanoparticles in general) in a fluid matrix a challenging task.…”

Section: Introductionmentioning

confidence: 99%

A New Label-Free Technique for Analysing Evaporation Induced Self-Assembly of Viral Nanoparticles Based on Enhanced Dark-Field Optical Imaging

et al. 2017

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Nanoparticle self-assembly is a complex phenomenon, the control of which is complicated by the lack of appropriate tools and techniques for monitoring the phenomenon with adequate resolution in real-time. In this work, a label-free technique based on dark-field microscopy was developed to investigate the self-assembly of nanoparticles. A bio-nanoparticle with complex shape (T4 bacteriophage) that self-assembles on glass substrates upon drying was developed. The fluid flow regime during the drying process, as well as the final self-assembled structures, were studied using dark-field microscopy, while phage diffusion was analysed by tracking of the phage nanoparticles in the bulk solutions. The concentrations of T4 phage nanoparticles and salt ions were identified as the main parameters influencing the fluid flow, particle motion and, consequently, the resulting self-assembled structure. This work demonstrates the utility of enhanced dark-field microscopy as a label-free technique for the observation of drying-induced self-assembly of bacteriophage T4. This technique provides the ability to track the nano-sized particles in different matrices and serves as a strong tool for monitoring self-assembled structures and bottom-up assembly of nano-sized building blocks in real-time.

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Monitoring pattern formation in drying and wetting dispersions of gold nanoparticles by ESEM

Cited by 8 publications

References 54 publications

Hydrophobic and Hydrophilic Au and Ag Nanoparticles. Breakthroughs and Perspectives

Hydrophobic and Hydrophilic Au and Ag Nanoparticles. Breakthroughs and Perspectives

Large scale self-assembly of plasmonic nanoparticles on deformed graphene templates

A New Label-Free Technique for Analysing Evaporation Induced Self-Assembly of Viral Nanoparticles Based on Enhanced Dark-Field Optical Imaging

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