Dispersion of carbon nanotubes by photo- and thermal-responsive polymers containing azobenzene unit in the backbone

Umeyama, Tomokazu; Kawabata, Kazuhiro; Tezuka, Noriyasu; Matano, Yoshihiro; Miyato, Yuji; Matsushige, Kazumi; Tsujimoto, Masahiko; Isoda, Seiji; Takano, Mikio; Imahori, Hiroshi

doi:10.1039/c0cc00709a

Cited by 50 publications

(39 citation statements)

References 29 publications

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“…To the best of our knowledge, only three pioneering studies on the photochemical dispersibility control of SWNTs using photoresponsive polymers have recently been reported. One is the photocleaving of poly(ethyleneglycol)‐terminate malachite green,7 while other examples are based on change in cavity spaces due to the photoisomerization of the backbone of π ‐conjugated polymers 8, 9. However, non‐polymeric dispersants with a photoresponsibility in an aqueous phase have not yet been developed.…”

Section: Observed D and The Corresponding Uncertainties (In Bracket) mentioning

confidence: 99%

Photoinduced Dispersibility Tuning of Carbon Nanotubes by a Water‐Soluble Stilbene as a Dispersant

et al. 2011

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A water‐soluble stilbene derivative with cationic charges enables tuning of the dispersibility of the single‐walled carbon nanotubes (SWNTs) in aqueous solution by photoirradiation. The nearly coplanar core of the stilbene dispersant interacts with the SWNTs via π–π interactions, resulting in a stable dispersion of the SWNTs. Photoinduced cyclization for the dispersant‐triggered reprecipitation of the SWNTs is due to detachment of the dispersant from SWNTs surfaces.

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Section: Observed D and The Corresponding Uncertainties (In Bracket) mentioning

confidence: 99%

Photoinduced Dispersibility Tuning of Carbon Nanotubes by a Water‐Soluble Stilbene as a Dispersant

et al. 2011

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“…Among these polymer materials, polyazobenzene has unique physical and chemical light-induced interconversion properties that make them ideal photo-triggered switches for drug delivery systems. An example of this is shown in the study done by Umeyama et al 48 involving polyazobenzene polymers used as dispersants for the single-walled carbon nanotubes. These nanotubes were highly tunable through intermolecular interactions within the polymer, thereby demonstrating the possibility of carbon nanotube-based polymeric drug delivery systems for therapeutic purposes.…”

Section: Commonly Used Nanomaterials For Photo-triggered Medical Applmentioning

confidence: 99%

Nanomaterials for Photo-Based Diagnostic and Therapeutic Applications

Menon¹,

Jadeja²,

Tambe³

et al. 2013

Theranostics

250

154

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Photo-based diagnosis and treatment methods are gaining prominence due to increased spatial imaging resolution, minimally invasive modalities involved as well as localized treatment. Recently, nanoparticles (NPs) have been developed and used in photo-based therapeutic applications. While some nanomaterials have inherent photo-based imaging capabilities, others including polymeric NPs act as nanocarriers to deliver various fluorescent dyes or photosensitizers for photoimaging and therapeutic applications. These applications can vary from Magnetic Resonance Imaging (MRI) and optical imaging to photothermal therapy (PTT) and chemotherapy. Materials commonly used for development of photo-based NPs ranges from metal-based (gold, silver and silica) to polymer-based (chitosan, dextran, poly ethylene glycol (PEG) and poly lactic-co-glycolic acid (PLGA)). Recent research has paved the way for multi-modal 'theranostic' (a combination of therapy and diagnosis) nano-carriers capable of active targeting using cell-specific ligands and carrying multiple therapeutic and imaging agents for accurate diagnosis and controlled drug delivery. This review summarizes the different materials used today to synthesize photo-based NPs, their diagnostic and therapeutic applications as well as the current challenges faced in bringing these novel nano-carriers into clinical practices.

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“…Wang et al reported the synthesis of polyimides containing azobenzene unit as the cross linker [15]. In 2010 a study showed that azobenzene containing polymers can be used as the dispersing agents for carbon nanotubes [16]. Several conjugated polymers having azobenzene unit on the backbone were reported for interesting applications such as nonlinear optical devices, self structuring polymer films and photoresponsive polymers [17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Electrochromism in multichromic conjugated polymers: Thiophene and azobenzene derivatives on the main chain

Apaydın

Akpinar

Sendur

et al. 2012

Journal of Electroanalytical Chemistry

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Dispersion of carbon nanotubes by photo- and thermal-responsive polymers containing azobenzene unit in the backbone

Cited by 50 publications

References 29 publications

Photoinduced Dispersibility Tuning of Carbon Nanotubes by a Water‐Soluble Stilbene as a Dispersant

Photoinduced Dispersibility Tuning of Carbon Nanotubes by a Water‐Soluble Stilbene as a Dispersant

Nanomaterials for Photo-Based Diagnostic and Therapeutic Applications

Electrochromism in multichromic conjugated polymers: Thiophene and azobenzene derivatives on the main chain

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