Ultrafast Laser-Induced Atomic Structure Transformation of Au Nanoparticles with Improved Surface Activity

Zhu, Dezhi; Yan, Jianfeng; Xie, Jiawang; Liang, Zhenwei; Bai, Hailin

doi:10.1021/acsnano.1c02570

Cited by 22 publications

(15 citation statements)

References 41 publications

(72 reference statements)

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“…As one of the most common lasers, carbon dioxide (CO 2 ) laser has been widely used in food, medicine, machinery and electronics, aerospace, and other fields with the characteristics of low-cost, simple operation, and high photothermal conversion efficiency. − The interaction between CO 2 laser and materials is mainly manifested as the thermal effect, which can be used in the surface treatment, cutting, patterning, and perforation of materials. − Recently, laser direct writing (LDW) as new technology has been widely used for the surface patterning of metals, ceramics, plastics, and other materials. LDW exhibits great potential in designing patterns, especially for polymers, in that the high-energy laser beam irradiates the materials to generate instantaneous high temperature, leaving permanent patterns on the polymers’ surface by carbonization, discoloration, vaporization, or foaming. − Typical applications are to make logos, images, texts, two-dimensional codes, or barcodes to ensure the identification and traceability of various commodities.…”

Section: Introductionmentioning

confidence: 99%

Achieving Rewritable Fluorescent Patterning on Dye-Doped Polymers Using Programmable Laser Direct Writing

Peng

Chen

et al. 2022

Ind. Eng. Chem. Res.

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There is an urgent need to broaden the new horizons of laser direct writing (LDW). Herein, the programmable rewritable laser fluorescent patterning on polymers was realized by doping dyes and CO 2 laser LDW for the first time. The prepared fluorescent patterns had high brightness and high precision under 365 nm UV light. Importantly, the designed patterns could repeatedly be rewritten using CO 2 laser. A series of poly(methyl methacrylate) (PMMA) doped with quinacridone (DClQA) dye were prepared to perform CO 2 laser LDW and characterizations. Attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectroscopy revealed no generation of new compounds after LDW. Thermogravimetric analysis−Fourier transform infrared−gas chromatography−mass spectroscopy (TGA-FTIR-GC-MS) indicated that the samples could be decomposed into complex products at high temperatures, and it also revealed no generation of any fluorescent substances. We confirmed the mechanism of the laser-induced fluorescence is that the dissociated DClQA molecules caused by the CO 2 laser are more inclined to form hydrogen bonds with PMMA macromolecules, so that they cannot be restacked and recrystallized, leading to the disappearance of the intrinsic fluorescence quenching phenomenon of DClQA; thus, the fluorescence is naturally emitted. Benefiting from high precision, rewritable, and programmability, laser fluorescent patterning will have good application prospects in the field of polymer products anticounterfeiting.

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Section: Introductionmentioning

confidence: 99%

Achieving Rewritable Fluorescent Patterning on Dye-Doped Polymers Using Programmable Laser Direct Writing

Peng

Chen

et al. 2022

Ind. Eng. Chem. Res.

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“…[ 23,24 ] The stacking fault was also reported in the laser processed metal nanoparticle, which was generated by the combined effect of thermal and dynamics stress. [ 25,26 ]…”

Section: Introductionmentioning

confidence: 99%

“…[23,24] The stacking fault was also reported in the laser processed metal nanoparticle, which was generated by the combined effect of thermal and dynamics stress. [25,26] The interaction between femtosecond laser and metals is a complex process, which involves energy transportation and mechanical dynamics on different spatial and temporal scales. [27,28] When a femtosecond laser pulse illuminates on metal, the incident photons are first absorbed by the…”

mentioning

confidence: 99%

Atomic‐Level Insight into the Formation of Subsurface Dislocation Layer and Its Effect on Mechanical Properties During Ultrafast Laser Micro/Nano Fabrication

Xie

Yan

Zhu

et al. 2021

Adv Funct Materials

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Micro/nano processing technologies have been extensively studied since micro/nano structures are used in different area such as microelectronics and microdevices. As a high-precision processing technology, ultrafast laser has been applied in the fabrication of different types of metallic micro/nano structures. However, the knowledge about the materials response of metals at atomic scale during laser processing is still necessary to explore. Herein, the femtosecond laser processing of metals from the atomic structure perspective is revealed. Three different layers named recast layer, high density dislocation layer, and unaffected layer are found after femtosecond laser irradiation. The recast layer is on the surface, which is generated from the resolidification of melting materials. The high density dislocation layer, consisting of dislocations and stacking faults, is observed beneath the irradiated surface. The dislocation layer is produced by the laser-induced stress wave, and the mechanical properties of irradiated surface are affected by the laser-induced subsurface dislocation layer. The unaffected layer is not affected by laser irradiation, and maintains the initial atomic structure. The research gives new information about the ultrafast laser processing of metals at atomic-level, which is helpful to the fabrication of functional micro/nano devices for wide applications.

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“…38 Observations such as these have encouraged the development of methods to deliberately incorporate planar defects into nanoparticles, for example, using plasmon mediation 34 and ultrafast lasers. 39 Here, we combine single-crystal gold seeds with twin insertion during post-seed growth in the presence of CTAB, to synthesize different gold nanoparticle morphologies, including twinned nanocubes and right bipyramids. The type (parallel or cyclic) and number of twin planes incorporated during the growth, together with environment control of surface chemistry, determines the final shape of nanoparticles.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Similarly, platinum icosahedral nanocrystals with twin planes show 4 times increased activity in an oxygen reduction reaction when compared with their single-crystal counterparts enclosed by the same {111} facets . Observations such as these have encouraged the development of methods to deliberately incorporate planar defects into nanoparticles, for example, using plasmon mediation and ultrafast lasers …”

Section: Introductionmentioning

confidence: 99%

Shape Control Beyond the Seeds in Gold Nanoparticles

Tong

Yadav

et al. 2021

Chem. Mater.

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In typical seed-mediated syntheses of metal nanocrystals, the shape of the nanocrystal is determined largely by the seed nucleation environment and subsequent growth environment (where “environment” refers to the chemical environment, including the surfactant and additives). In this approach, crystallinity is typically determined by the seeds, and surfaces are controlled by the environment(s). However, surface energies, and crystallinity, are both influenced by the choice of environment(s). This limits the permutations of crystallinity and surface facets that can be mixed and matched to generate new nanocrystal morphologies. Here, we control post-seed growth to deliberately incorporate twin planes during the growth stage to deliver new final morphologies, including twinned cubes and bipyramids from single-crystal seeds. The nature and number of twin planes, together with surfactant control of facet growth, define the final nanoparticle morphology. Moreover, by breaking symmetry, the twin planes introduce new facet orientations. This additional mechanism opens new routes for the synthesis of different morphologies and facet orientations.

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Ultrafast Laser-Induced Atomic Structure Transformation of Au Nanoparticles with Improved Surface Activity

Cited by 22 publications

References 41 publications

Achieving Rewritable Fluorescent Patterning on Dye-Doped Polymers Using Programmable Laser Direct Writing

Achieving Rewritable Fluorescent Patterning on Dye-Doped Polymers Using Programmable Laser Direct Writing

Atomic‐Level Insight into the Formation of Subsurface Dislocation Layer and Its Effect on Mechanical Properties During Ultrafast Laser Micro/Nano Fabrication

Shape Control Beyond the Seeds in Gold Nanoparticles

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