Diffusion Limited Photoluminescence Quantum Yields in 1-D Semiconductors: Single-Wall Carbon Nanotubes

Hertel, Tobias; Himmelein, Sabine; Ackermann, Thomas; Stich, Dominik; Crochet, Jared

doi:10.1021/nn101612b

Cited by 176 publications

(307 citation statements)

References 49 publications

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“…31,[37][38][39][40][41][42][43] Both our 1 , and 2 , fall within ranges expected based on data from these previous reports. A detailed list of input values is included in Tables S3 and S4 The copyright holder for this preprint (which was not .…”

supporting

confidence: 84%

Dual Near Infrared Two-Photon Microscopy for Deep-Tissue Dopamine Nanosensor Imaging

Bonis-O’Donnell

Page

Beyene

et al. 2017

Preprint

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A key limitation for achieving deep imaging in biological structures lies in photon attenuation of fluorescence. In particular, neurotransmitter imaging is challenging in the biologicallyrelevant context of the intact brain, for which photons must traverse the cranium, skin, and bone. Thus, fluorescence imaging is limited to the surface cortical layers of the brain, only achievable with a craniotomy. Herein, we describe optimal excitation and emission wavelengths for through-cranium imaging, and demonstrate that near-infrared emissive nanosensors can be photoexcited using a two-photon 1550 nm excitation source. Dopaminesensitive nanosensors can undergo 2-photon excitation, and provide chirality-dependent responses selective for dopamine with fluorescent turn-on responses varying between 20% and 350%. We further calculate the 2-photon absorption cross-section and quantum yield of dopamine nanosensors, and confirm a 2-photon power law relationship for the nanosensor excitation process. Finally, we show improved image quality of nanosensors imbedded 2 mm deep into a brain-mimetic tissue phantom, whereby 1-photon excitation yields 42% scattering, in contrast to 4% scattering when the same object is imaged under 2-photon excitation. Our approach overcomes traditional limitations in deep-tissue fluorescence microscopy, and can enable neurotransmitter imaging in the biologically-relevant milieu of the intact and living brain.peer-reviewed)

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supporting

confidence: 84%

Dual Near Infrared Two-Photon Microscopy for Deep-Tissue Dopamine Nanosensor Imaging

Bonis-O’Donnell

Page

Beyene

et al. 2017

Preprint

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“…24,25 Moreover, defect-induced quenching is used to understand how the excitonic quantum efficiency drops with doping in diffusion-limited contact quenching models. 26 Certainly doping is well-established in bulk semiconductors to introduce new optical levels. For all of these reasons, doping or defect-related states seem the most likely explanation for the deep levels here.…”

Section: Discussionmentioning

confidence: 99%

“…26 If the levels are sufficiently sparse, they are like buckets which can become full, and so invisible, leaving the tube bright, only to empty and become quenchers again. Rather than the adsorption and desorption of dopants, it is likely that much of the blinking and its onset stem initially from the introduction of dopant levels which fluctuate in terms of their charge state and so become hidden and revealed alternately.…”

Section: Discussionmentioning

confidence: 99%

Photoinduced Band Gap Shift and Deep Levels in Luminescent Carbon Nanotubes

Finnie

Jacques

2012

ACS Nano

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Individual air-suspended single-walled carbon nanotubes are imaged both spatially and spectrally in photoluminescence. At low excitation power, photoluminescence is bright and stable with high quantum efficiency; however, higher power initially causes a gradual red shift and then more severe changes. Blinking, the loss of quantum efficiency, and the appearance of new deep levels are all seen and can be explained by the introduction of defects. We propose that optical excitation induces molecular deposition onto the nanotube by optically induced van der Waals interactions, leading to physisorption and ultimately chemisorption which severely degrades the luminescence.KEYWORDS: single-walled carbon nanotube . photoluminescence . exciton . quantum efficiency . band gap shift . van der Waals interaction ARTICLE FINNIE AND LEFEBVRE

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“…Radiative and nonradiative rates were taken from [63,84,98] and presented in Table I. Generating functions were directly measured with single-color excitation and presented in Fig.7.…”

Section: Si: Rate Equations and Pl Quenching Rate For Dna-induced Nonmentioning

confidence: 99%

Two-color spectroscopy of UV excited ssDNA complex with a single-wall nanotube photoluminescence probe: Fast relaxation by nucleobase autoionization mechanism

et al. 2016

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SWNT ssDNADNA is capable to recover after absorbing ultraviolet (UV) radiation, for example, by autoionization (AI). Singlewall carbon nanotube (SWNT) two-color photoluminescence spectroscopy was combined with quantum mechanical calculations to explain the AI in self-assembled complexes of DNA wrapped around SWNT. DNA autoionization is a fundamental process wherein UV-photoexcited nucleobases dissipate energy by charge transfer to the environment without undergoing chemical damage. Here, single-wall carbon nanotubes (SWNT) are explored as a photoluminescent reporter for studying the mechanism and rates of DNA autoionization. Two-color photoluminescence spectroscopy allows separate photoexcitation of the DNA and the SWNTs in the UV and visible range, respectively. A strong SWNT photoluminescence quenching is observed when the UV pump is resonant with the DNA absorption, consistent with charge transfer from the excited states of the DNA to the SWNT. Semiempirical calculations of the DNA-SWNT electronic structure, combined with a Green's function theory for charge transfer, show a 20 fs autoionization rate, dominated by the hole transfer. Rate-equation analysis of the spectroscopy data confirms that the quenching rate is limited by the thermalization of the free charge carriers transferred to the nanotube reservoir. The developed approach has a great potential for monitoring DNA excitation, autoionization, and chemical damage both in vivo and in vitro arXiv:1512.00710v1 [cond-mat.mes-hall] 2 Dec 2015 2

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Diffusion Limited Photoluminescence Quantum Yields in 1-D Semiconductors: Single-Wall Carbon Nanotubes

Cited by 176 publications

References 49 publications

Dual Near Infrared Two-Photon Microscopy for Deep-Tissue Dopamine Nanosensor Imaging

Dual Near Infrared Two-Photon Microscopy for Deep-Tissue Dopamine Nanosensor Imaging

Photoinduced Band Gap Shift and Deep Levels in Luminescent Carbon Nanotubes

Two-color spectroscopy of UV excited ssDNA complex with a single-wall nanotube photoluminescence probe: Fast relaxation by nucleobase autoionization mechanism

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