Two-Photon Excited Fluorescence and Second-Harmonic Generation of the DAST Organic Nanocrystals

Zheng, Mei‐Ling; Fujita, Katsumasa; Chen, Weiqiang; Duan, Xuan‐Ming; Kawata, Satoshi

doi:10.1021/jp202323y

Cited by 42 publications

(42 citation statements)

References 30 publications

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“…Modification of the physical properties in peptide nanomaterials is a new way to fabricate basic nanoscale units for future bottom‐up nanotechnologies . Bioinspired peptide nanostructures, much like other organic nanostructures, have ultra‐small sizes and are easily produced by a rapid self‐assembly fabrication process. All these properties make them favorable for implementation in diverse applications, and especially in biophotonics devices.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Optical Bioinspired Peptide Nanostructures

Handelman

Lavrov

Kudryavtsev

et al. 2013

Advanced Optical Materials

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Many peptide nanostructures, self-assembled from chemically synthesized biomolecules, have drawn much attention in the fi eld of nanotechnology due to their physical, chemical, and biological properties, which make them promising candidates for applications in bionanomedicine, [ 1 ] bionanotechnology, [ 2,3 ] electronics, [ 4,5 ] optics, [ 6 ] energy storage, [ 7,8 ] etc. Some of these properties, such as ferro-and piezoelectricity observed in diphenylalanine nanotubes (FF-PNT) [ 9 ] are directly related to the nanocrystalline structural asymmetry of the elementary building blocks comprising these supramolecular materials. [ 6,10 ] One basic physical effect that depends on both the crystalline symmetry and the electronic properties of dielectric materials is second harmonic generation (SHG). SHG is observed only in crystals with no center of symmetry [ 11 ] and is related to ferroelectric phenomena together with linear electrooptical and piezoelectric effects. Ferroelectric effects have been observed in many biological materials such as plants, animals, and human tissues (amino acids, pineal gland of brain, skin, tendon, etc.). [ 12 ] Today, the SHG effect is also exploited in optical microscopy, especially in medical and biological research. [ 13 ] It allows the detection of two-photon emission from biomaterials and biopolymers [ 14 ] lacking a center of symmetry. The effect has been used with quantitative metrics for diagnosing a wide range of diseases. [ 15 ] Recently, second-order responses have also been found in bioinspired aromatic FF-PNT with hexagonal space group P6 1 using nonlinear optical microscopy. [ 16 ] Both the elementary crystalline symmetry and the electronic structure of bioinspired peptide nanostructures can be significantly changed by deep reconstruction process, such as phase transformation at a nanoscale level, which results in the disappearance of an SHG response. [ 17 ] Another method to modulate these fundamental properties is to use different solvents, [18][19][20][21] which strongly infl uence the self-assembly process and defi ne peptide nanostructures' morphologies. Modifi cation of the physical properties in peptide nanomaterials is a new way to fabricate basic nanoscale units for future bottom-up nanotechnologies. [ 6 ] Bioinspired peptide nanostructures, much like other organic nanostructures, [ 22,23 ] have ultra-small sizes and are easily produced by a rapid self-assembly fabrication process. All these properties make them favorable for implementation in diverse applications, and especially in biophotonics devices.In this work, we have studied the SHG effect in bioorganic peptide nanostructures of different morphologies and symmetries, such as nanotubes, nanofi bers, nanobelts, and nanospheres. These nanostructures were self-assembled in different solvents from peptide precursors with a variable number of A nonlinear optical effect of a second harmonic generation (SHG) was fi rst observed in quartz and then found in many inorganic materials that have an asymmetric crystalline s...

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Section: Introductionmentioning

confidence: 99%

Nonlinear Optical Bioinspired Peptide Nanostructures

Handelman

Lavrov

Kudryavtsev

et al. 2013

Advanced Optical Materials

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“…A typical nonlinear microscopy based on TPA is shown in Fig. 1.16 [42]. In TPEF microscopy, an infrared laser beam is focused through an objective lens.…”

Section: Two-photon-excited Fluorescence Microscopymentioning

confidence: 99%

“…1.16 A typical nonlinear microscopy based on TPA. Reprinted with the permission from [42]. Copyright 2011 American Chemical Society 1 Multiphoton Process in Nanofabrication and Microscopy Imaging second-harmonic coefficient.…”

Section: Second/third-harmonic-generation Microscopymentioning

confidence: 99%

“…SHG does not involve the excitation of molecules like other techniques such as fluorescence microscopy; therefore, the molecules should not suffer the effects of phototoxicity or photobleaching. Since 2010, SHG has been extended to styryl dyes and whole-animal in vivo imaging [42,47,48]. Figure 1.19 shows the SHG image of a single styryl dye (DAST) crystal and the corresponding polarization dependence.…”

Section: Second/third-harmonic-generation Microscopymentioning

confidence: 99%

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Multiphoton Process in Nanofabrication and Microscopy Imaging

Zheng

Duan

2014

Nano-Optics and Nanophotonics

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Under the intense intensity of femtosecond laser pulse, various nonlinear optical effects between laser and matter can occur. Among them, one nonlinear optical effect, multiphoton absorption (MPA), is easily induced by femtosecond laser pulse, which provides an opportunity to achieve the spatial resolution smaller than optical diffraction limit. Multiphoton process using femtosecond laser has provided a powerful technique for fabricating three-dimensional (3D) micro/nanostructures and microscopy imaging due to its intrinsic 3D penetration depth and high spatial resolution at nanometric scale. As an emerging micro/nanofabrication technique, multiphoton polymerization (MPP) based on multiphoton process has been used in fabricating various micromachines and microdevices with conventional photoresists and polymer nanocomposites, such as microneedles, micropumps, microgear sets, and 3D photonic crystals. Aside from MPP based on multiphoton process, microscopy imaging is another research field employing multiphoton process. Two-photon-excited fluorescence (TPEF) microscopy, an established nonlinear microscopy technique, is more practically useful for noninvasive live cell imaging because of the deeper penetration, less photobleaching, and higher spatial resolution. Second-harmonic generation (SHG) is a nonlinear optical process, in which photons with the same frequency interacting with a nonlinear material are effectively "combined" to generate new photons with twice the energy, and therefore twice the frequency and half the wavelength of the initial photons. SHG, as an even-order nonlinear optical effect, is only allowed in

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“…have been showing great promise in SHG applications, however, the common synthesizing methods are usually either too complicated and expensive or unfi t for the achievement of bulk materials, which is crucial for opening up possibilities for particular photonic devices. Nanomaterials, as the potential SHG media, have been explored due to their excellent nonlinear optical properties, [14][15][16][17][18][19][20] wide transparency range, and good chemical stability. [21][22][23] However, they are not suffi ciently well-mastered to allow SHG applications as traditional inorganic single crystals.…”

Section: Doi: 101002/adma201104297mentioning

confidence: 99%

Controlled Synthesis of Bulk Polymer Nanocomposites with Tunable Second Order Nonlinear Optical Properties

Yan

Zhao

et al. 2012

Advanced Materials

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The transparent bulk polymer nanocomposites blended with rare earth nanoparticles are prepared through the radical polymerization of trimethylolpropane trimethylacrylate (TMPTMA). These materials produce continuously tunable second harmonic (SH) radiation under illumination of a wide spectral range of fundamental waves (750-850 nm). The SHG efficiency can be controlled well by altering the Tb(3+) doping content in the nanoparticles.

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Two-Photon Excited Fluorescence and Second-Harmonic Generation of the DAST Organic Nanocrystals

Cited by 42 publications

References 30 publications

Nonlinear Optical Bioinspired Peptide Nanostructures

Nonlinear Optical Bioinspired Peptide Nanostructures

Multiphoton Process in Nanofabrication and Microscopy Imaging

Controlled Synthesis of Bulk Polymer Nanocomposites with Tunable Second Order Nonlinear Optical Properties

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