Optical three-dimensional shape analysis of metallic nanoparticles after laser-induced deformation

Stalmashonak, Andrei; Seifert, G.; Graener, H.

doi:10.1364/ol.32.003215

Cited by 43 publications

(40 citation statements)

References 10 publications

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“…Different techniques are employed to characterize the particle morphology [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

“…One direct and powerful technique is transition electron microscopy (TEM) [15,[28][29][30][31][32][33][34][35][36][37]40], but TEM suffers from the fact that sample preparation for three-dimensional TEM investigations is rather complicated and cannot be easily accomplished in situ. In addition, obtaining sufficient statistical data from TEM measurements is extremely time consuming.…”

Section: Introductionmentioning

confidence: 99%

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Determination of Morphological Parameters of Supported Gold Nanoparticles: Comparison of AFM Combined with Optical Spectroscopy and Theoretical Modeling versus TEM

2012

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The morphology of small gold particles prepared by Volmer-Weber growth on sapphire substrates have been investigated by two different characterization techniques. First, by non-extensive atomic force microscopy (AFM) in combination with optical spectroscopy and modeling of the optical properties using a theoretical model, recently developed in our group. Second, by extensive transmission electron microscopy (TEM). Comparing the results obtained with both techniques demonstrate that for small gold nanoparticles within the quasistatic limit, the morphological properties can be precisely determined by an appropriate theoretical modeling of the optical properties in combination with simple AFM measurements. The apparent mean axial ratio of the nanoparticles, i.e., the axial ratio that corresponds to the center frequency of the ensemble plasmon resonance, is obtained easily from the extinction spectrum. The mean size is determined by the nanoparticle number density and the amount of deposited material, measured by AFM and a quartz micro balance, respectively. To extract the most probable axial ratio of the nanoparticle ensemble, i.e., the axial ratio that corresponds to the most probable nanoparticle size in the ensemble, we apply the new theoretical model, which allows to extract the functional dependence of the nanoparticle shape on its size. The morphological parameters obtained with this procedure will be afterwards compared to extensive TEM measurements. The results obtained with both techniques yield excellent agreement. For example, the lateral dimensions of the nanoparticles after deposition of 15.2 × 10 15 atoms/cm 2 of gold has been compared. While a mean lateral diameter of (13 ± 2) nm has been extracted from AFM, optical spectroscopy and modeling, a value of (12 ± 2) nm is derived from TEM.

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“…Different techniques are employed to characterize the particle morphology [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Determination of Morphological Parameters of Supported Gold Nanoparticles: Comparison of AFM Combined with Optical Spectroscopy and Theoretical Modeling versus TEM

2012

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“…[10][11][12][13][14][15][16][17][18] Depending on applied intensity and number of pulses, this procedure transforms the NPs to either prolate ͑large aspect ratio͒ or oblate spheroids ͑very poor aspect ratio͒, with their symmetry axis being uniformly oriented along to the laser polarization. 15,16 This shape transformation on the nanoscale leads macroscopically to two different regimes of dichroism ͑redshifted SP band observed with light polarized parallel or perpendicular to laser polarization͒. Previous experiments using circular polarization, however, showed no dichroism in the optical spectra measured with light propagating in the same direction as the laser pulses ͑i.e., along the surface normal͒.…”

mentioning

confidence: 99%

“…These irradiation parameters ͑intensity and number of pulses͒ correspond to the low intensity, multishot regime as described in Refs. 15 The method used for NPs three-dimensional ͑3D͒ shape determination is the same as the one already described in Ref. 15.…”

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confidence: 99%

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Transformation of silver nanospheres embedded in glass to nanodisks using circularly polarized femtosecond pulses

Stalmashonak

Graener

Seifert

2009

Applied Physics Letters

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We prove by help of optical microspectroscopy that spherical Ag nanoparticles embedded in glass can be transformed to oblate (disklike) shapes by irradiation with circularly polarized femtosecond laser pulses. The symmetry axis (short axis) of the oblate spheroids produced by this method is oriented along the laser propagation direction. This observation also confirms the assumption that the mechanism of shape transformation starts with directed photoionization of nanoparticles induced by laser irradiation in combination with the electric field enhancement at the particle-glass interface.

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Recent Advances in Hybrid Optical Materials: Integrating Nanoparticles within a Glass Matrix

Wei

Ebendorff‐Heidepriem

Zhao

2019

Advanced Optical Materials

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Glass containing optically active nanoparticles have been manufactured for centuries. However, only in the early 1900s, the invention of ultramicroscope and development of Mie theory paved the way to discovering the occurrence of nanoparticles in glass and their special role in imparting unique optical properties to glass. This groundbreaking insight inspired scientists to extensively research such nanoparticles‐in‐glass hybrid optical materials, which led to a series of fundamental breakthroughs (e.g., invention of glass ceramics, discovery of quantum dots) and commercial successes (e.g., photosensitive glass, photochromic glass, dichromic polarizer). Over the past decades, a new wave of research in this area has been initiated by opportunities of incorporating a large variety of synthetic nanoparticles in glass, which promises the development of advanced functional devices for lighting, display, smart window, data storage, and sensing applications. Recent development of various approaches of fabricating nanoparticles‐in‐glass hybrid optical materials and postmodifying nanoparticles that are embedded in glass is reviewed. The state‐of‐the‐art techniques relevant to controlling the dispersion, distribution, orientation, and nanostructure of nanoparticles in glass, as well as manipulating the macroscopic performance of the hybrid materials are discussed. Examples of applications with promising pathway to commercially viable devices based on hybrid optical materials are outlined.

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Optical three-dimensional shape analysis of metallic nanoparticles after laser-induced deformation

Cited by 43 publications

References 10 publications

Determination of Morphological Parameters of Supported Gold Nanoparticles: Comparison of AFM Combined with Optical Spectroscopy and Theoretical Modeling versus TEM

Determination of Morphological Parameters of Supported Gold Nanoparticles: Comparison of AFM Combined with Optical Spectroscopy and Theoretical Modeling versus TEM

Transformation of silver nanospheres embedded in glass to nanodisks using circularly polarized femtosecond pulses

Recent Advances in Hybrid Optical Materials: Integrating Nanoparticles within a Glass Matrix

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