Nonlinear Photoluminescence Spectrum of Single Gold Nanostructures

Knittel, Vanessa; Fischer, Marco; Roo, Tjaard de; Mecking, Stefan; Leitenstorfer, Alfred; Brida, Daniele

doi:10.1021/nn5066233

Cited by 51 publications

(66 citation statements)

References 33 publications

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“…The excitation wavelength for these gold NPs is determined by their size/shape effects, porosity structure and dopant composition. 119,120 When a pulsed laser resonantly excited gold-based NPs in the SPR band, they are able to perform wavelength UC and produce intense nonlinear optical signals, such as second harmonic generation (SHG), TPF and third harmonic generation (THG). 18 Except for SPR absorption, the band-to-band transition states can also enhance the yield of nonlinear optical processes.…”

Section: Multiphoton-based Npsmentioning

confidence: 99%

Revisiting the classification of NIR-absorbing/emitting nanomaterials for in vivo bioapplications

et al. 2016

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With the development of nonlinear optics and new imaging methods, near-infrared (NIR) light can excite contrast agents to probe biological specimens both functionally and structurally with a deeper imaging depth and a higher spatial resolution than linear optical approaches. There is considerable and growing interest in how biological specimens respond to NIR light. Moreover, the visible absorption band of most functional nanomaterials becomes NIR-excitable through multiphoton processes, thus allowing multifunctional imaging and combined therapy with noble metal and magnetic nanoparticles both in vitro and in vivo. A groundbreaking example is the use of different laser techniques to excite single-type NIR-absorbing/emitting nanomaterials to produce multiphoton emission by femtosecond lasers using either a remote control system for photodynamic therapy or photo-induced chemical bond dissociation. These techniques provided superior anatomical resolution and detection sensitivity for in vivo tumor-targeted imaging than those offered by conventional methods. Here we summarize the most recent progress in the development of smart NIR-absorbing/emitting nanomaterials for in vivo bioapplications.

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Section: Multiphoton-based Npsmentioning

confidence: 99%

Revisiting the classification of NIR-absorbing/emitting nanomaterials for in vivo bioapplications

et al. 2016

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“…One of the methods by which such sensitivity could be enhanced is by using metal nanoparticles (NP), especially gold (Au) and silver (Ag), by virtue of their ability to generate large local nanoscale electric field due to their surface plasmon resonance (SPR) . However, while the use of such NP or their oligomers or arrays has been shown to be effective in enhanced sensitivity of molecules for instance, through surface enhanced Raman scattering (SERS) or photoluminescence (PL) enhancement, their use in bioinspired membranes has not been very fruitful.…”

Section: Introductionmentioning

confidence: 99%

Plasmonic Lipid Bilayer Membranes for Enhanced Detection Sensitivity of Biolabeling Fluorophores

Bhattacharya

Indukuri

Begam

et al. 2015

Adv Funct Materials

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Plasmonics based sensing using the surface plasmon resonance of metal nanoparticles has been effectively demonstrated in various applications. Extending this methodology to cell and artificial lipid bilayer membranes would be extremely beneficial in enhancing the sensitivity of the detection of binding and cellular transport of molecules across such membranes. Here we demonstrate the creation of a artificial plasmonic biomembrane template and use it to demonstrate the enhanced detection sensitivity of certain widely used biomarker molecules. The efficacy of these templates are explained in terms of the ability of the hydrophobic polymer grafted gold nanoparticles, used, to organize, penetrate and fluidize the membranes. The enhancement of photoluminescence of the dye molecules used occurs over a reasonably large spectral range as compared to the plasmon resonance of gold nanoparticles. The results could, possibly, be extended to cellular membrane with relevant modifications, as well as to detection of any other biological molecules, appropriately labeled with fluorescent dye molecules and demonstrates the versatility of these plasmonic bio-inspired platforms as potential bio-chemical sensors.

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“…As a driving source for the nonlinear emission in gold nanoantennas, we employ an ultrabroadband femtosecond fiber laser that guarantees the stability and broad spectral coverage necessary to study the dependence on the excitation wavelength and thereby measuring the dispersion of the nonlinear susceptibility [35][36][37]. The ultrashort pulses are generated in a highly nonlinear fiber that allows tuning of the center wavelength from 900 to 2100 nm at a repetition rate of 40 MHz.…”

mentioning

confidence: 99%

Dispersion of the nonlinear susceptibility in gold nanoantennas

et al. 2017

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Femtosecond optical pulses tunable in the near infrared are exploited to drive third harmonic generation (THG) and incoherent multiphoton photoluminescence (MPPL) in gold plasmonic nanoantennas. By comparing the yield of the two processes concurrently occurring on the same nanostructure, we extract the coherent third-order response of the antenna. Its contribution is enhanced at shorter excitation wavelengths allowing the observation of dispersion in the nonlinear susceptibility of gold.

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Nonlinear Photoluminescence Spectrum of Single Gold Nanostructures

Cited by 51 publications

References 33 publications

Revisiting the classification of NIR-absorbing/emitting nanomaterials for in vivo bioapplications

Revisiting the classification of NIR-absorbing/emitting nanomaterials for in vivo bioapplications

Plasmonic Lipid Bilayer Membranes for Enhanced Detection Sensitivity of Biolabeling Fluorophores

Dispersion of the nonlinear susceptibility in gold nanoantennas

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