Dynamics of Cadmium Sulfide Nanoparticles within Polystyrene Melts

Jang, Woo‐Sik; Koo, Peter K.; Bryson, Kyle; Narayanan, Suresh; Sandy, Alec; Russell, Thomas P.; Mochrie, S. G. J.

doi:10.1021/ma500956b

Cited by 18 publications

(20 citation statements)

References 61 publications

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“…At great distances from

q^{normal*}

(

q

> 0.025 Å −1 ), the noisy intensity correlation compromised any meaningful measurements of

g_{2}

and the corresponding

τ

. Theoretical and experimental studies have shown that many types of highly structured but disordered soft matter exhibit slow relaxation with hyperdiffusive dynamics. Two concepts have been proposed to explain hyperdiffusion.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, we cannot confirm the model that is suitable to analyze the current results. However, slow relaxation with hyperdiffusive dynamics are often investigated via the SFR model . Therefore, we utilized the SFR model to analyze the current study.…”

Section: Resultsmentioning

confidence: 99%

“…We used the CdS‐S2VPs synthesis procedure from Koh et al’s and our previous studies. The detailed synthesis procedure is provided in the Supporting Information.…”

Section: Methodsmentioning

confidence: 99%

“…By contrast, X‐ray photon correlation spectroscopy (XPCS) can probe length scales as small as 20 nm, which is in the appropriate resolution range of individual NPs . Over the past decade, a variety of investigations on the dynamics of NPs within a viscous medium have been undertaken using XPCS . For example, we reported a detailed study of the dynamics of CdS NPs suspended in PS homopolymer matrices using XPCS .…”

Section: Introductionmentioning

confidence: 99%

“…Over the past decade, a variety of investigations on the dynamics of NPs within a viscous medium have been undertaken using XPCS . For example, we reported a detailed study of the dynamics of CdS NPs suspended in PS homopolymer matrices using XPCS . For low molecular weight PS, the observed dynamics showed a crossover from diffusive to hyperdiffusive behavior with decreasing temperatures.…”

Section: Introductionmentioning

confidence: 99%

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The Static Structure and Dynamics of Cadmium Sulfide Nanoparticles within Poly(styrene‐block‐isoprene) Diblock Copolymer Melts

Jang

Koo

Bryson

et al. 2015

Macro Chemistry & Physics

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The static structure and dynamic behavior of cadmium sulfi de nanoparticles suspended in block copolymer matrix are investigated using transmission electron microscopy, small-angle X-ray scattering, and X-ray photon correlation spectroscopy. The transmission electron microscopy study shows that cadmium sulfi de nanoparticles are preferentially segregated within the polyisoprene domain of a poly(styrene-block -isoprene) diblock copolymer. For the dynamics study, X-ray photon correlation spectroscopy captures the relaxation process of cadmium sulfi de nanoparticles. The measured characteristic relaxation time reveals that the observed dynamics are hyperdiffusive. The characteristic velocity and corresponding activation energy, which are hallmarks of a hyperdiffusive system, are determined from the relationship between the characteristic relaxation time and the wavevector.the BCP provide a means to precisely control the spatial organization of the NPs. Theoretical investigations have suggested that a synergetic interaction between NPs and a self-organizing BCP matrix could produce hierarchically structured functional hybrid materials. [1][2][3] We refer to these nanocomposites as NP-BCPs. Such material design fl exibility is utilized to tune the electrical, [ 4 ] magnetic, [ 5 ] or biomedical [ 6 ] properties of targeted NP-BCPs. Despite recent progress on the fabrication techniques and contemporary applications of NP-BCPs, the equilibrium state and structural dynamics of these materials still remains poorly understood. This is in part because NP-BCPs compound the diffi culties caused by the entropic and enthalpic interactions between NPs and the BCP domain. In addition, many of the key methods for structural elucidation are less useful for characterizing dynamic behavior.The unique self-assembling features of the BCP can be used to synthesize NPs. Specifi cally, poly(styrene-block -2 vinylpyridine) (S2VP) or poly(styrene-block -4 vinylpyridine) (S4VP), which are solvent-selective diblock copolymers, provide a micellar structure for metal/semiconductor

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“…At great distances from

q^{normal*}

(

q

> 0.025 Å −1 ), the noisy intensity correlation compromised any meaningful measurements of

g_{2}

and the corresponding

τ

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…We used the CdS‐S2VPs synthesis procedure from Koh et al’s and our previous studies. The detailed synthesis procedure is provided in the Supporting Information.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The Static Structure and Dynamics of Cadmium Sulfide Nanoparticles within Poly(styrene‐block‐isoprene) Diblock Copolymer Melts

Jang

Koo

Bryson

et al. 2015

Macro Chemistry & Physics

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Nanoparticle Transport Through Polymers and Along Interfaces

Boyle

Maguire

Rose

et al. 2022

Macromolecular Engineering

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Transport of nanoparticles has received increasing attention for both fundamental interest to test prevailing models as well as practical interest in separations and self‐healing applications. Methods for measuring particle dynamics are briefly reviewed to orient the reader to different methodologies. The transport of nanoparticles through polymer melts, solutions, and cross‐linked networks is described with emphasis on systems where the nanoparticle is on the length scale of the defining structure including the tube size, correlation length, and mesh size, respectively. Because nanoparticles can interact with the different mediums, the interactions between nanoparticles and polymer and the subsequent impacts on dynamics are described. The transport of particles at liquid–solid (polymer brush) interfaces is addressed due to growing interest in applications ranging from understanding dynamics in porous media to the translocation of DNA. Both hard particles and polymer grafted particles (soft particles) are described. The objective of this article is to provide the reader with fundamental descriptions of phenomena while reviewing the current state of understanding. Further directions will leverage advances in inorganic chemistry to prepare monodisperse, functional nanoparticles as well as polymer chemistry to create novel media, such as networks with monodisperse mesh size.

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X-Ray Photon Correlation Spectroscopy for the Characterization of Soft and Hard Condensed Matter

Bikondoa

2016

X-Ray and Neutron Techniques for Nanomaterials Characterization

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Dynamics of Cadmium Sulfide Nanoparticles within Polystyrene Melts

Cited by 18 publications

References 61 publications

The Static Structure and Dynamics of Cadmium Sulfide Nanoparticles within Poly(styrene‐block‐isoprene) Diblock Copolymer Melts

The Static Structure and Dynamics of Cadmium Sulfide Nanoparticles within Poly(styrene‐block‐isoprene) Diblock Copolymer Melts

Nanoparticle Transport Through Polymers and Along Interfaces

X-Ray Photon Correlation Spectroscopy for the Characterization of Soft and Hard Condensed Matter

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