Billion-fold rate enhancement of urethane polymerization via the photothermal effect of plasmonic gold nanoparticles

Haas, Kaitlin M.; Lear, Benjamin J.

doi:10.1039/c5sc02149a

Cited by 49 publications

(63 citation statements)

References 31 publications

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“…Nanoparticle mediated photothermal phase transitions and chemical reactions have the potential to improve many fields of energy harvesting [1][2][3][4][5][6][7][8][9][10][11][12]. The efficiency of a nanoparticle photothermal process in a liquid medium requires surface interactions between particle and solution, however these interactions have received little study.…”

Section: Main Textmentioning

confidence: 99%

Surface modification of carbon black nanoparticles enhances photothermal separation and release of CO2

Goetz

Nguyen

Esser‐Kahn

2016

Carbon

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Carbon black nanoparticles (CB) were covalently modified to improve the photothermal regeneration of a CO 2 capture nanofluid through decarboxylation. Photothermal release of CO 2 addresses the high energy costs associated with regenerating capture fluids. By incorporating sulfonamides on the surface of CB, we enhance the photothermal separation of CO 2 from MEA by approximately 70% more than the unmodified CB. In contrast, with an anionic sulfonate on the surface, the total CO 2 released fell by 60%. We verified the chemical composition and structure of surface modification using complementary techniques including FT-IR, TGA, XPS, and Raman spectroscopy. Main Text:Nanoparticle mediated photothermal phase transitions and chemical reactions have the potential to improve many fields of energy harvesting [1][2][3][4][5][6][7][8][9][10][11][12]. The efficiency of a nanoparticle photothermal process in a liquid medium requires surface interactions between particle and solution, however these interactions have received little study. Previously, we observed that oxidized nanoparticles enhanced photothermal regeneration of an aqueous monoethanolamine (MEA) CO 2 capture fluid [13]. This occurs when carbon black nanoparticles (CB) activated by light convert photo energy into thermal energy, resulting in breaking the C-N bond between CO 2 and MEA. These results show how a photothermal process might be used to drive chemical reactions in solution with high energy efficiencies. Here, we show the effect of surface modification on photothermal efficiency of regenerating MEA by releasing CO 2 . Modification of the CB surface changes the: (1) dispersability in solution, or aggregate size and (2) the amount of released CO 2 from chemically bound MEA. We modified the surface of CB particles using sulfonation with sodium nitrite, followed by an additional sulfonamide bond formation, both of

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Section: Main Textmentioning

confidence: 99%

Surface modification of carbon black nanoparticles enhances photothermal separation and release of CO2

Goetz

Nguyen

Esser‐Kahn

2016

Carbon

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“…For instance, plasmonic heating of AuNPs inside polydimethylsiloxane (PDMS) was applied for thermal curing at the nanoscale to generate a PDMS shell (80–430 nm) within 16 seconds under 532 nm continuous wave (CW) laser irradiation with a power density of 378 kW cm −2 . In another work, polyurethane films were photothermally cured from isocyanide and alcohol reactants in bulk‐scale in the presence of 2 nm AuNPs under 532 nm Nd:YAG pulsed laser (8 ns pulses, 50 mJ pulse −1 ) irradiation at 12.5 mW cm −2 for 4 min, which resulted a billion‐fold enhancement of curing rate . In addition, interfacial damage on a glass fiber was photothermally healed and interlocked by melting 40–120 μm PMMA (poly(methyl methacrylate)) resins in the presence of AuNPs with 1600 W cm −2 power density of 532 nm CW diode laser irradiation for 5 min .…”

Section: Introductionmentioning

confidence: 99%

“…[11] In another work, polyurethane films were photothermally cured from isocyanide and alcohol reactants in bulk-scale in the presence of 2nmA uNPs under 532 nm Nd:YAG pulsed laser (8 ns pulses, 50 mJ pulse À1 )i rradi-ation at 12.5 mW cm À2 for 4min, which resulted ab illion-fold enhancement of curing rate. [12] In addition, interfacial damage on ag lass fiber was photothermally healed and interlocked by melting4 0-120 mmP MMA (poly(methyl methacrylate)) resins in the presence of AuNPs with 1600 Wcm À2 powerd ensity of 532 nm CW diode laser irradiation for 5min. [13] Recently,w e also demonstrated ap hotothermal degelation of AuNPs embedded peptideo rganogels within 10 seconds by irradiating with a5 32 nm green laser at ap ower density of 50 mW cm À2 .…”

Section: Introductionmentioning

confidence: 99%

Measuring Temperature Change at the Nanometer Scale on Gold Nanoparticles by Using Thermoresponsive PEGMA Polymers

et al. 2017

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Plasmonic heating of gold nanoparticles (AuNPs) under laser illumination is a highly desirable technique, especially for cancer therapy. However, significant drawbacks still remain including uncontrolled heat release from AuNPs, random exposure duration, and selection of the proper laser power without damaging normal healthy cells. Herein, we demonstrate a simple and versatile method to measure temperature variation on the surface of Au nanoparticles under laser irradiation based on a thermoresponsive polymer, poly(ethylene glycol) methylether methacrylate (PEGMA). In this context, a series of PEGMA polymers were synthesized to have different lower critical solution temperature (LCST) values (28–90 °C) and conjugated to the surface of spherical AuNPs by a gold–thiolate linkage. According to our strategy, the AuNPs first photothermally absorb light energy and convert it to heat owing to their tailored photothermal characteristics. The generated heat from the AuNPs subsequently dissipates into the surrounding thermoresponsive PEGMA polymer. When the temperature generated on the Au surface upon laser irradiation for a certain exposure time reaches the LCST value of the surrounding PEGMA polymer, the polymer chain collapses. Therefore, the hydrodynamic diameter of the PEGMA‐coated AuNPs changes, which can be easily monitored by using dynamic light scattering (DLS). We systematically measured the temperature (28–90 °C) generated on the AuNP surfaces by using different laser power densities with varying durations. We believe that the resulting strategy will be very valuable for oncologists to easily predict the minimum laser power and duration needed to destroy the cancer cells through the photothermal effect of Au nanostructures.

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“…[14] Beyond this finding,little attention has been paid to bulk fluid flows that are thermally activated by the irradiation of particles.Tofill this gap,weexamined the ability of TiO 2 microparticles,e xposed to UV light, to generate thermally driven convective flows and harness this mechanism to assemble colloidal crystal monolayers.S uch lattice structures are comprised of highly organized nano-and micron-scale particles and have gained attention owing to their potential in sensors,c oatings,a nd optoelectronics. [17][18][19][20] When ab eam of ultraviolet light is focused on as uspension of titanium dioxide nanoparticles,t he solution immediately begins to flow convectively about the region being irradiated. [17][18][19][20] When ab eam of ultraviolet light is focused on as uspension of titanium dioxide nanoparticles,t he solution immediately begins to flow convectively about the region being irradiated.…”

mentioning

confidence: 99%

“…[15,16] To provide ab enchmark, we compare the behavior of the TiO 2 system to the well-studied heat generation by irradiated gold nanoparticles dispersed in an aqueous solution. [17][18][19][20] When ab eam of ultraviolet light is focused on as uspension of titanium dioxide nanoparticles,t he solution immediately begins to flow convectively about the region being irradiated. This was observed in a1cm-diameter steel-walled chamber with glass cover slips on the top and bottom (Supporting Information, Figure S1).…”

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confidence: 99%

Organization of Particle Islands through Light‐Powered Fluid Pumping

et al. 2019

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The field of active matter holds promise for applications in particle assembly,c argo and drug delivery, and sensing. In pursuit of these capabilities,r esearchers have produced as uite of nanomotors,f luid pumps,a nd particle assembly strategies.A lthough promising,t here are many challenges,e specially for mechanisms that rely on chemical propulsion. One way to circumvent these issues is by the use of external energy sources.Herein, we propose amethod of using freely suspended nanoparticles to generate fluid pumping towards desired point sources.T he pumping rates are dependent on particle concentration and light intensity,m aking it highly controllable.U sing these directed flows,w ef urther demonstrate the ability to reversibly construct and move colloidal crystals.

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Billion-fold rate enhancement of urethane polymerization via the photothermal effect of plasmonic gold nanoparticles

Abstract: We report that the photothermal effect of gold nanoparticles can be used to provide a billion fold enhancement to the rate of urethane polymerization.

Cited by 49 publications

References 31 publications

Surface modification of carbon black nanoparticles enhances photothermal separation and release of CO2

Surface modification of carbon black nanoparticles enhances photothermal separation and release of CO2

Measuring Temperature Change at the Nanometer Scale on Gold Nanoparticles by Using Thermoresponsive PEGMA Polymers

Organization of Particle Islands through Light‐Powered Fluid Pumping

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