Giant Raman scattering from J-aggregated dyes inside carbon nanotubes for multispectral imaging

Gaufrès, Étienne; Tang, Nathalie; Lapointe, François; Cabana, Janie; Nadon, M.-A.; Cottenye, Nicolas; Raymond, François; Szkopek, Thomas; Martel, Richard

doi:10.1038/nphoton.2013.309

Cited by 90 publications

(160 citation statements)

References 32 publications

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“…The enhancement could arise from adsorption of the aqueous [Fe (CN) 6 ] 4-ions on the surface of CNTs at the L/L interface, which could also decrease the hydration sphere of the complex. 70,71 In fact, a splitting of the E g mode of anhydrous K 4 [Fe(CN) 6 ] occurs, compared to the hydrated complex, that correlates with the C≡N band profile observed in Figure 5. 29,68 To evaluate PB formation over the CNT film, the laser was focused directly onto the L/L interface where the above-mentioned signals are present.…”

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confidence: 70%

Electrodeposition of Prussian Blue/Carbon Nanotube Composites at a Liquid‑Liquid Interface

Husmann

Booth

Zarbin

et al. 2018

J. Braz. Chem. Soc.

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The iron complex hexacyanoferrate (Fe 4 [Fe(CN) 6 ] 3 ), known as Prussian Blue (PB), was electrodeposited over a free-standing carbon nanotube (CNT) film assembled at the interface between two immiscible liquids, water and 1,2-dichlorobenzene. Polarization of the interface achieved through a fixed potential or under potential variation enabled iron present inside CNTs to generate a stable CNT/PB composite. We report herein on the observation that the deposition of PB is dependent on both the pH and applied potential. It was found that aqueous phases containing K 3 [Fe(CN) 6 ] can decompose under an applied potential, while those containing K 4 [Fe(CN) 6 ] presented more stable behavior making it a suitable precursor for PB synthesis. The electrodeposition and modification of the interface was followed by in situ spectroelectrochemical Raman spectroscopy, which indicated that an increase in signal due to PB formation was acompanied by changes in the CNT bands due to modification of the CNT walls by decoration with PB, forming a composite structure. Keywords: liquid-liquid interface, Prussian Blue, carbon nanotubes, immiscible liquids IntroductionBiphasic liquid/liquid (L/L) systems have been used for a long time, either for the study of interfacial electron and ion transfer reactions or for the synthesis and assembly of micro and nano-sized materials.1,2 The interface between two immiscible liquids provides a defect-free environment suitable for controlled homogeneous particle deposition. Driven by the decrease in the L/L interfacial free energy, particles dispersed or synthesized in a biphasic system spontaneously migrate to the interface formed by the two liquids. [3][4][5] Due to the ease of formation and robust nature of L/L interfaces, they have been utilized in a wide range of different applications. The L/L system can be used simply as a means to assemble previously synthesized materials into organized arrays or thin films, such as carbon nanostructures or metal nanoparticles. 6,7 Alternatively, materials can be both synthesized and assembled by using the L/L interface as the region of contact between reactants located in the different phases. [8][9][10] As an alternative to spontaneous reactions occurring at the point of contact between the two phases, material deposition can also occur by electrochemical polarization of the interface. 11,12 In addition to standard synthetic parameters such as concentration, time or pH, the applied potential and polarization of the interface between the two immiscible electrolyte solutions (ITIES) governs the rate of ion and electron transfer between the phases, allowing significant control over synthetic procedures. 1,2,13,14 By combining these different approaches to utilize the L/L interface, composite structures can be prepared using one material as the support and/or nucleation site for the other. 15,16 Previously, it has been observed that particle or polymer formation was possible, under stirring, on the surface of carbon nanostructures present in a L/L sy...

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mentioning

confidence: 70%

Electrodeposition of Prussian Blue/Carbon Nanotube Composites at a Liquid‑Liquid Interface

Husmann

Booth

Zarbin

et al. 2018

J. Braz. Chem. Soc.

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“…The top histogram is the total distribution in the image while the distributions bellow comes from selected areas of a mono-and bilayers, respectively. Adapted from Gaufrès et al [16].…”

Section: Resultsmentioning

confidence: 99%

“…The fabrication procedure is described elsewhere. [16] The nanotube density, their average length and the composition of the graphene layer (i.e. the relative composition of double and single layer graphene) were acquired using an atomic force microscope (Fig.…”

Section: Examples Of Structural Analysis Of Nanomaterialsmentioning

confidence: 99%

“…This significant difference is ascribed to the van Hove singularities in SWCNTs, which induces excitonic transitions that strongly enhance the Raman CS at the excitation wavelength of the laser. In Gaufrès et al [16] , we determined using this procedure the CS of the encapsulated 6T dyes, which is similar to that of SWCNTs. This comparison provides a deeper understanding of the resonance enhancement in this nanohybrid system and helps the design of Raman tags for bioimaging applications.…”

Section: Examples Of Structural Analysis Of Nanomaterialsmentioning

confidence: 99%

“…Surface Enhanced Raman Scattering, [14] Coherent Anti-Stokes Resonance Spectroscopy [15] and Aggregation Enhanced Raman Scattering. [16,17] However, these techniques require specific configurations to amplify the electromagnetic fields or to align dipoles, which are poorly adapted to help more generally the investigation of nanomaterials. Raman spectroscopy and imaging of various nanomaterials at submicron resolution are nevertheless possible due to the presence of strong optical resonances, which provide access to Resonance Raman Spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

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Hyperspectral Raman imaging using Bragg tunable filters of graphene and other low‐dimensional materials

Gaufrès

Marcet

Aymong

et al. 2017

J Raman Spectroscopy

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imaging is presented as a powerful method to acquire quantitative as well as qualitative information on lowdimensional materials. The method is, however, not widely used due to limitations of the Raman scanning instruments. Here we present a hyperspectral Raman system based on Bragg tunable filtering that is capable of global imaging with significantly reduced acquisition time and improved sensitivity compared to scanning confocal Raman microscopes. The operation principles of the instrument are presented, and the performance is benchmarked using a calibrated carbon nanotube sample. Examples of various applications are shown to illustrate the abilities of the technique to characterize samples deposited on oxidized silicon substrates, including graphene stacks prepared by chemical-vapor deposition, exfoliated MoS 2 , and carbon nanotubes filled with dye molecules. The wealth of information available through this hyperspectral Raman imaging technique opens many new ways to probe the properties of complex low-dimensional materials.

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Molecularly Engineered Hierarchical Nanodisc from Antiparallel J‐stacked BODIPY Conjugates: Application to Theranostics with Mutually Beneficial Properties

Yan

Liu

et al. 2020

Adv Funct Materials

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The J‐aggregation of dye‐functional group conjugates, which results in intriguing photophysical properties and highly ordered structures, has several advantages over that of monomeric dyes and exhibits augmented performance compared to that of monomeric functional groups, thereby providing a novel platform for devising materials with advanced functions. Herein, it is reported that a molecularly engineered nanodisc by the antiparallel J‐aggregation of halogenated BODIPY‐Gd(III), a dye‐functional group conjugate. The highly directional halogen‐bonding interactions enable a unique antiparallel J‐stacking of BODIPY‐Gd(III), resulting in an alternating, orderly arrangement of the functional Gd(III) groups on the surfaces of the nanodisc, and allowing water stability and an enhanced magnetic resonance signal. Moreover, the J‐stacked dyes render the nanodisc with excellent photothermal performance, such as intense NIR‐absorptivity, high photothermal conversion efficiency, and a nearly non‐photobleaching capability. Preliminary in vivo studies demonstrated the potential of the nanodisc as an efficient bimodal photoacoustic and high‐performing magnetic resonance imaging, and antitumor photothermal therapy agent. This conceptual work not only establishes a general strategy for nano‐J‐aggregates with desired dye arrangement, controlled size, and in vivo stability, but also advances the antiparallel J‐aggregation of dye‐functional group conjugates as a potential platform for multifunctional integration and modulation, wherein multiple functional groups and BODIPYs can be installed.

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Giant Raman scattering from J-aggregated dyes inside carbon nanotubes for multispectral imaging

Cited by 90 publications

References 32 publications

Electrodeposition of Prussian Blue/Carbon Nanotube Composites at a Liquid‑Liquid Interface

Electrodeposition of Prussian Blue/Carbon Nanotube Composites at a Liquid‑Liquid Interface

Hyperspectral Raman imaging using Bragg tunable filters of graphene and other low‐dimensional materials

Molecularly Engineered Hierarchical Nanodisc from Antiparallel J‐stacked BODIPY Conjugates: Application to Theranostics with Mutually Beneficial Properties

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