An enhanced plasmonic photothermal effect for crystal transformation by a heat-trapping structure

Kong, Ting; Zhang, Chenyun; Lu, Jiangbo; Kang, Bowen; Fu, Zhengkun; Li, Jinping; Yan, Lei; Zhang, Zhenglong; Zheng, Hairong; Xu, Hongxing

doi:10.1039/d0nr06714h

Cited by 13 publications

(12 citation statements)

References 31 publications

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“…In the past, photothermal heating of plasmonic nanoparticles was already exploited in several prototypes for clean water regeneration, triboelectric energy generation, or photothermal catalysis. [ 26– 28 ] However, due to the inability to structure nanoscopic properties on a 3D macroscopic scale, postulated devices mainly consist of thin films where heating is limited to the surface and scalability needs to be improved. We show for three selected geometries that 3D structuring improves light penetration by a factor of four—thus enabling a more homogenous heat generation in a macroscopic object.…”

Section: Discussionmentioning

confidence: 99%

Additive‐Free, Gelled Nanoinks as a 3D Printing Toolbox for Hierarchically Structured Bulk Aerogels

Rebber

Trommler²,

Lokteva

et al. 2022

Adv Funct Materials

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Aerogels are highly porous solids that maintain the properties of individual nanomaterials at a macroscopic scale. However, the inability to fabricate hierarchical architectures limits technological implementation in energy storage, gas‐sorption, or catalysis. A 3D‐printing methodology for additive‐free TiO2 nanoparticle‐based aerogels is presented with full control of the nano‐, micro‐, and macroscopic length‐scales. To compensate for ink's low solid loading of 4.0 vol% and to enable subsequent processing into aerogels via supercritical drying, the printing is done in a liquid bath of alkaline pH. The 3D‐printing protocol retains a high specific surface area of 539 m2 g–1 and a mesopore diameter of 20 nm of conventionally casted aerogels while offering an unparalleled designability on the micrometer scale. To illustrate the new geometric freedom of 3D‐printed aerogels, the microstructure of a strongly light‐absorbing, photothermal Au‐nanorod/TiO2 aerogel is defined. To date, photothermal nanomaterials are mainly applied in the form of unstructured films where scalability is limited by light attenuation. Microstructures in 3D enhance light penetration by a factor of four and facilitate spatially defined heating on a macroscopic scale. The process can be generalized for a broad material library and allows to design inks with specific functionality, thus making aerogels adaptable for their target application.

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Section: Discussionmentioning

confidence: 99%

Additive‐Free, Gelled Nanoinks as a 3D Printing Toolbox for Hierarchically Structured Bulk Aerogels

Rebber

Trommler²,

Lokteva

et al. 2022

Adv Funct Materials

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“…The NaYF 4 :Eu 3+ /Al 2 O 3 /GNI and NaYF 4 :Eu 3+ @GNP samples were prepared according to our previous work. 30,31,41,42 NaYF 4 :Eu 3+ nanoparticles were quickly synthesized with wet chemical methods. Firstly, 25 mM Y(NO 3 ) 3 , 0.25 mM Eu(NO 3 ) 3 and 8.75 mM NaF were mixed into a 50 mL solution with deionized water and stirred vigorously at 75 °C for 2 hours.…”

Section: Methodsmentioning

confidence: 99%

“…28,29 The rapid in situ transformation of NaYF 4 nanocrystals under mild conditions using the plasmonic photothermal effect of gold nanoparticles and gold nanoparticle island films was studied in our previous reports. 30,31 A plasmon allows the confinement of heat to a localized small scale, which could be useful for the growth of nanocrystals in some critical environments. For example, low temperatures reduce thermal noise and help to characterize nanomaterials with high precision atomic-level imaging or fine spectroscopy, [32][33][34] which reveals information about the structure and performance of nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

Plasmon driven nanocrystal transformation in low temperature environments

et al. 2022

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“…Heat trapping layers can be added to achieve plasmonically enhanced PT efficiency and to increase the thermal stability of the plasmonic materials, while also reducing oxidation. For example, Al 2 O 3 has been added as a trapping layer on Ag to increase the stability to over three months, while Ag alone underwent oxidation within 20 days [ 198 ]. The thermal stability of Au/Ag nanoparticles with different morphologies is shown in Figure 27 and Figure 28 .…”

Section: Reviewmentioning

confidence: 99%

Plasmonic nanotechnology for photothermal applications – an evaluation

Indhu¹,

Keerthana²,

Dharmalingam³

2023

Beilstein J. Nanotechnol.

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The application of plasmonic nanoparticles is motivated by the phenomenon of surface plasmon resonance. Owing to the tunability of optothermal properties and enhanced stability, these nanostructures show a wide range of applications in optical sensors, steam generation, water desalination, thermal energy storage, and biomedical applications such as photothermal (PT) therapy. The PT effect, that is, the conversion of absorbed light to heat by these particles, has led to thriving research regarding the utilization of plasmonic nanoparticles for a myriad of applications. The design of conventional nanomaterials for PT conversion has focussed predominantly on the manipulation of photon absorption through bandgap engineering, doping, incorporation, and modification of suitable matrix materials. Plasmonic nanomaterials offer an alternative and attractive approach in this regard, through the flexibility in the excitation of surface plasmons. Specific advantages are the considerable improved bandwidth of the absorption, a higher efficiency of photon absorption, facile tuning, as well as flexibility in the synthesis of plasmonic nanomaterials. This review of plasmonic PT (PPT) research begins with a theoretical discussion on the plasmonic properties of nanoparticles by means of the quasi-static approximation, Mie theory, Gans theory, generic simulations on common plasmonic material morphologies, and the evaluation processes of PT performance. Further, a variety of nanomaterials and material classes that have potential for PPT conversion are elucidated, such as plasmonic metals, bimetals, and metal–metal oxide nanocomposites. A detailed investigation of the essential, but often ignored, concept of thermal, chemical, and aggregation stability of nanoparticles is another part of this review. The challenges that remain, as well as prospective directions and chemistries, regarding nanomaterials for PT conversion are pondered on in the final section of the article, taking into account the specific requirements from different applications.

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An enhanced plasmonic photothermal effect for crystal transformation by a heat-trapping structure

Abstract: Photothermal utilization is an important approach for sustaining global ecological balance. Since the enhancement of light absorption through surface plasmon resonance, silver or gold nanostructures can be used as efficient...

Cited by 13 publications

References 31 publications

Additive‐Free, Gelled Nanoinks as a 3D Printing Toolbox for Hierarchically Structured Bulk Aerogels

Additive‐Free, Gelled Nanoinks as a 3D Printing Toolbox for Hierarchically Structured Bulk Aerogels

Plasmon driven nanocrystal transformation in low temperature environments

Plasmonic nanotechnology for photothermal applications – an evaluation

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