Optical Super-Resolution Imaging of Surface Reactions

Chen, Tao; Dong, Bin; Chen, Kuangcai; Zhao, Fei; Cheng, Xiaodong; Ma, Changbei; Lee, Seung‐Ah; Zhang, Peng; Kang, Seong Ho; Ha, Ji Won; Xu, Weilin; Fang, Ning

doi:10.1021/acs.chemrev.6b00673

Cited by 144 publications

(120 citation statements)

References 334 publications

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“…Photo-induced heterogeneous electron transfer (ET) across the semiconductor and adsorbed molecules, leading to the formation of radicals (e.g., •OH) is of particular relevance for any photocatalytic reaction, but studying such highly reactive species is challenging [91,99]. An emerging approach is based on the use of organic dye probes in microscopic fluorescence imaging, for the sensitive detection of reactive oxygen species, their diffusion in solution or air, and the identification of photocatalytic active facets on semiconductor surfaces [100,101]. Recently, a mass spectrometry-based approach was used to investigate the ultrafast ET of photoelectrons generated by ultraviolet irradiation on the surfaces of semiconductor nanoparticles or crystalline facets, providing a new technique for studying the photo-electric properties of various materials [102].…”

Section: Discussionmentioning

confidence: 99%

Brookite: Nothing New under the Sun?

2017

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Advances in the synthesis of pure brookite and brookite-based TiO 2 materials have opened the way to fundamental and applicative studies of the once least known TiO 2 polymorph. Brookite is now recognized as an active phase, in some cases showing enhanced performance with respect to anatase, rutile or their mixture. The peculiar structure of brookite determines its distinct electronic properties, such as band gap, charge-carrier lifetime and mobility, trapping sites, surface energetics, surface atom arrangements and adsorption sites. Understanding the relationship between these properties and the photocatalytic performances of brookite compared to other TiO 2 polymorphs is still a formidable challenge, because of the interplay of many factors contributing to the observed efficiency of a given photocatalyst. Here, the most recent advances in brookite TiO 2 material synthesis and applications are summarized, focusing on structure/activity relation studies of phase and morphology-controlled materials. Many questions remain unanswered regarding brookite, but one answer is clear: Is it still worth studying such a hard-to-synthesize, elusive TiO 2 polymorph? Yes.

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Section: Discussionmentioning

confidence: 99%

Brookite: Nothing New under the Sun?

2017

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“…Single-particle measurement by removing ensemble averaging, that can uncover the heterogeneous and dynamic behaviors of individual nanoparticles, is highly desired to interrogate the catalytic properties of the particle with single-turnover resolution. [29][30][31][32] Because of the difficult in morphology manipulation at single-particle level, it is still a grand challenge to disclose the catalytic properties of the same particle with different morphologies. Laser assisted shape modulation has been widely used for the controllable manipulation of metal nanoparticle morphology.…”

Section: Introductionmentioning

confidence: 99%

Laser illumination-induced dramatic catalytic activity change on Au nanospheres

Wei

Xiao

et al. 2019

Chem. Sci.

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“…Plasmonic nanostructures, capable of strong interaction with incident light by exciting localized surface plasmon resonance (LSPR), have attracted numerous interests in the fields of plasmon‐enhanced spectroscopies, imaging, chemical transformations, and solar energy conversion. [3c,d] Notably, the enhanced‐electromagnetic field (“hot spots”) near plasmonic surfaces because of strong plasmon resonance coupling fully benefits to magnify the cross‐section of surface‐enhanced Raman spectroscopy (SERS)[1b,c,4] and extended applications . During these years, cited methods for synthesizing plasmonic nanostructures, such as chemical synthesis, photoreduction, and electron beam lithography,[4d,8] have been developed to facilitate their applications.…”

Section: Introductionmentioning

confidence: 99%

Femtosecond Photon‐Mediated Plasma Enhances Photosynthesis of Plasmonic Nanostructures and Their SERS Applications

Peng

Jiang

et al. 2019

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LSPR), have attracted numerous interests in the fields of plasmon-enhanced spectroscopies, [1] imaging, [2] chemical transformations, [3] and solar energy conversion. [3c,d] Notably, the enhancedelectromagnetic field ("hot spots") near plasmonic surfaces because of strong plasmon resonance coupling fully benefits to magnify the cross-section of surface-enhanced Raman spectroscopy (SERS) [1b,c,4] and extended applications. [5] During these years, cited methods for synthesizing plasmonic nanostructures, such as chemical synthesis, [6] photoreduction, [7] and electron beam lithography, [4d,8] have been developed to facilitate their applications. Whereas the residual photoinitiators and reducing agents on plasmonic surfaces are always unexpected in biomedical analysis and redox reaction proceeding. To this end, the exploration of high tunable and surfactant-free approaches in fabricating SERS-active nanostructures is still highly in demand.In recent two decades, laser ablation in liquid (LAL) has been intensively studied as a green, simple, and versatile method to synthesize functional nanomaterials with various compositions and morphologies. [9] Generally, two categories are typically adopted to synthesize plasmonic nanostructures: chemical bottom-up and physical top-down. [9c] Photochemical reduction of metal precursors features bottom-up approach to synthesize colloidal nanoparticles. [7a,b,9d,10] By photolyzing the metal complexes, [11] or by using the photosensitive regents or photochemically generated intermediates (e.g., hydrated electrons and radicals from water radiolysis), [7a,10] metal cations could be photoreduced to neutral atoms or clusters. The top-down method mainly depends on laser ablation of bulk into nanoparticle dispersions. [12] The main mechanisms are based on converting the laser energy into material plasma or vapor phases, and micro/nano droplets. And they subsequently quench and react with the surrounding mediums to form colloidal nanostructures. [9b,c,12b,13] From this technique, numerous newfangled nanostructures with excellent plasmonic properties have been successfully synthesized with LAL technique by selecting the appropriate solvents, ligands, and laser parameters, which exhibit huge potential in plasmonic science and technologies. [9a-d] Laser ablation in liquid has proven to be a universal and green method to synthesize nanocrystals and fabricate functional nanostructures. This study demonstrates the superiority of femtosecond laser-mediated plasma in enhancing photoredox of metal cations for controllable fabrication of plasmonic nanostructures in liquid. Through employing upstream high energetic plasma during laser-induced microexplosions, single/three-electron photoreduction of metallic cations can readily occur without chemical reductants or capping agents. Experimental evidences demonstrate that this process exhibits higher photon utilization efficiency in yield of colloidal metal nanoparticles than direct irradiation of metallic precursors. Photogenerated hydr...

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Optical Super-Resolution Imaging of Surface Reactions

Cited by 144 publications

References 334 publications

Brookite: Nothing New under the Sun?

Brookite: Nothing New under the Sun?

Laser illumination-induced dramatic catalytic activity change on Au nanospheres

Femtosecond Photon‐Mediated Plasma Enhances Photosynthesis of Plasmonic Nanostructures and Their SERS Applications

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