Photothermal self-healing of gold nanoparticle–polystyrene hybrids

Cho, Yi Je; Kong, Lingchen; Islam, Rezawana; Nie, Meitong; Zhou, Wei; Lu, Kathy

doi:10.1039/d0nr05621a

Cited by 12 publications

(11 citation statements)

References 66 publications

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“…The photothermal effect refers to the generation of thermal energy using materials that can be photoexcited under electromagnetic radiation of certain wavelengths. − Thus far, numerous inorganic photothermal materials such as carbon nanotubes (CNTs), reduced graphene oxide (rGO), and Cu and Au nanoparticles have been investigated − and used in diverse applications based on self-healing DPNs. ,− For instance, Jung et al introduced polydopamine (PDA)-coated rGO to develop a polyurethane with disulfide bonds that can self-heal via the photothermal effect . When the scratched polyurethane nanocomposite (1 wt % PDA–rGO) was irradiated with an 808 nm laser (0.1 W/cm 2 ) for 10 min, the sample showed a healing efficiency of ∼87% because of the temperature-induced formation of reversible covalent disulfide bonds.…”

Section: Introductionmentioning

confidence: 99%

Fast, Localized, and Low-Energy Consumption Self-Healing of Automotive Clearcoats Using a Photothermal Effect Triggered by NIR Radiation

Son

Bae

et al. 2022

ACS Appl. Polym. Mater.

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Dynamic polymer networks containing photothermal materials have been reported to demonstrate highly efficient intrinsic self-healing under irradiation. In particular, organic near-infrared-absorbing ionic salts, such as diimmonium dyes, function as transparent polymer heaters and can enhance the self-healing properties of clearcoats. In this study, we designed a self-healing automotive clearcoat with a reversible polymer network based on acryl polyol (AP) and dynamic hindered urea (HU) bonds and introduced N-butyl-substituted diimmonium borate dye (DID) as a photothermal dye. To optimize the self-healing efficiency of the clearcoat and its transparency in the visible light region, the effects of the presence or absence of dynamic HU bonds and the concentration of the photothermal dye were precisely investigated. For a polymer system containing HU with 0.1 wt % DID (AP/HU-DID_0.1), the transparent automotive clearcoat was heated to ∼70 °C under focused sunlight irradiation and exhibited excellent (∼100% healing efficiency) and fast (<30 s) scratch-healing performance compared with a commercial automotive clearcoat. In addition, this photothermal effect-based self-healing clearcoat exhibited outstanding transparency (over 95%) and has a strong advantage with respect to energy consumption because it enables faster and more localized healing compared with thermal healing processes that require heating the entire product.

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Section: Introductionmentioning

confidence: 99%

Fast, Localized, and Low-Energy Consumption Self-Healing of Automotive Clearcoats Using a Photothermal Effect Triggered by NIR Radiation

Son

Bae

et al. 2022

ACS Appl. Polym. Mater.

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“…The interest in this field stems from the power that comes from pairing the precision with which we can control light with the generality of heat for driving chemical reactions. For instance, when the nanoscale photothermal agents (the species converting light to thermal energy) are heated with nanosecond pulses of light, one can control the distribution of this thermal energy with both nanometer and nanosecond precision. − The tightly localized and transient nature of the thermal energy raises the local temperatures by as much as 1000 °C, while the bulk temperature of the medium holding the supporting photothermal agents is raised by as little as 3 °C. − At the same time, these highly localized and transient temperatures retain their general power to drive chemical reactions in both conventional solutions and solid polymers ,,− and can be used to accomplish reactions on the bulk scale ( e.g. , centimeters) .…”

Section: Introductionmentioning

confidence: 99%

Rapid Photothermal Synthesis of Polyurethane from Blocked Isocyanates

2022

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Though it has been shown that the photothermal heating by pulsed lasers can provide localized heat to cure polymers at an enhanced rate without bulk temperature changes, such an approach has been unsuccessful at driving chemical transformations that require large increases in bulk temperature�such as the curing of blocked isocyanates. We show that photothermal heating using 1 W of continuous wave laser power directed toward a mixture of 6 wt % carbon black in a blocked isocyanate is sufficient to reach temperatures near 142 °C. Additionally, using both infrared and nuclear magnetic resonance spectroscopies, we demonstrate that this heat is sufficient to drive the deblocking of a trimer of hexamethylene diisocyanate blocked by methyl ethyl ketoxime. We also show that 1 s of such heating produces the same degree of deblocking as 8 h in an oven held at 160 °C. Finally, we demonstrate that photothermal heating can also drive the formation of a urethane bond that is spectroscopically identical to that produced after oven heating at 160 °C for 1 h. This work shows that photothermal heating with carbon black and a CW laser can provide bulk heat necessary for high temperature reactions while maintaining the photothermally induced kinetic advantage of localized heat.

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“…Considering that, at Earth’s ground (AM 1.5), the 87.7% of sun energy is comprised in the 350–1350 nm range, with the 52.4% at wavelengths >700 nm, , a key point is that the plasmonic nanostructures for light-to-heat conversion should cover such a wide spectral range. ,, More in general, the list of photothermal applications benefiting of broadband plasmon absorption also extends to the biomedical field, where light-triggered heating in the near-infrared (NIR) biological transparency window I (700–900 nm) or II (1000–1700 nm) has been used for photothermal therapy, photoacoustic imaging, controlled drug release, and antimicrobial systems . Besides, thermoplasmonic effects exploited for triggering chemical processes in self-healing materials, shape-morphing systems, and photothermal polymerization , preferentially rely on red or NIR light to avoid photodegradation and photoionization of the molecular constituents.…”

Section: Introductionmentioning

confidence: 99%

Au–Ag Alloy Nanocorals with Optimal Broadband Absorption for Sunlight-Driven Thermoplasmonic Applications

Pini

Pilot

Ischia

et al. 2022

ACS Appl. Mater. Interfaces

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Noble metal nanoparticles are efficient converters of light into heat but typically cover a limited spectral range or have intense light scattering, resulting in unsuited for broadband thermoplasmonic applications and sunlight-driven heat generation. Here, Au−Ag alloy nanoparticles were deliberately molded with an irregular nanocoral (NC) shape to obtain broadband plasmon absorption from the visible to the near-infrared yet at a lower cost compared to pure Au nanostructures. The Au−Ag NCs are produced through a green and scalable methodology that relies on pulsed laser fragmentation in a liquid, without chemicals or capping molecules, leaving the particles surface free for conjugation with thiolated molecules and enabling full processability and easy inclusion in various matrixes. Numerical calculations showed that panchromism, i.e., the occurrence of a broadband absorption from the visible to the near-infrared region, is due to the special morphology of Au−Ag alloy NCs and consists of a purely absorptive behavior superior to monometallic Au or Ag NCs. The thermoplasmonic properties were assessed by multiwavelength light-to-heat conversion experiments and exploited for the realization of a cellulose-based solar-steam generation device with low-cost, simple design but competitive performances. Overall, here it is shown how laser light can be used to harvest solar light. Besides, the optimized broadband plasmon absorption, the green synthetic procedure, and the other set of positive features for thermoplasmonic applications of Au−Ag NCs will contribute to the development of environmentally friendly devices of practical utility in a sustainable world.

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Photothermal self-healing of gold nanoparticle–polystyrene hybrids

Abstract: This study focused on the processing and photothermal healing of gold nanoparticle (Au NP) and polystyrene (PS) hybrid films. Effects of Au NP contents were investigated using hybrid films with...

Cited by 12 publications

References 66 publications

Fast, Localized, and Low-Energy Consumption Self-Healing of Automotive Clearcoats Using a Photothermal Effect Triggered by NIR Radiation

Fast, Localized, and Low-Energy Consumption Self-Healing of Automotive Clearcoats Using a Photothermal Effect Triggered by NIR Radiation

Rapid Photothermal Synthesis of Polyurethane from Blocked Isocyanates

Au–Ag Alloy Nanocorals with Optimal Broadband Absorption for Sunlight-Driven Thermoplasmonic Applications

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