A Compositional Window of Kinetic Stability for Amphiphilic Polymers and Colloidal Nanorods

Jeng, Esther S.; Shih, Chih‐Jen; Barone, Paul W.; Jones, Naomi; Baik, Joon Hyun; Abrahamson, Joel T.; Strano, Michael S.

doi:10.1021/jp109032h

Cited by 8 publications

(13 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A content of 13.6 wt% was chosen based on predictions from a model constructed by Jeng et al and empirical renement. 34 Each absorption peak represents the individual (n,m) species of SWNTs. 37,38 The degree to which SWNTs were individualized could be discriminated by the resolution of each peak, i.e.…”

Section: Suspension Ability Of P-dextranmentioning

confidence: 99%

“…In addition, this preparation scheme utilizing P-dextran does not require ultra-centrifugation and therefore reduces the time and cost of SWNT preparation, which can be scaled up to an industrial level. We previously reported that P-dextran effectively adsorbs onto SWNT surfaces 34 and maintains a stable SWNT suspension without forming bundles when it replaces SC through dialysis. 33 Herein, we explored the ability of P-dextran to suspend SWNTs by direct suspension, forming a P-dextran-SWNT system, using sonication.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Highly efficient exfoliation of individual single-walled carbon nanotubes by biocompatible phenoxylated dextran

Kwon¹,

Lee²,

Choi³

et al. 2013

Nanoscale

Self Cite

View full text Add to dashboard Cite

Highly efficient exfoliation of individual single-walled carbon nanotubes (SWNTs) was successfully demonstrated by utilizing biocompatible phenoxylated dextran, a kind of polysaccharide, as a SWNT dispersion agent. Phenoxylated dextran shows greater ability in producing individual SWNTs from raw materials than any other dispersing agent, including anionic surfactants and another polysaccharide. Furthermore, with this novel polymer, SWNT bundles or impurities present in raw materials are removed under much milder processing conditions compared to those of ultra-centrifugation procedures. There exists an optimal composition of phenoxy groups (∼13.6 wt%) that leads to the production of high-quality SWNT suspensions, as confirmed by UV-vis-nIR absorption and nIR fluorescence spectroscopy. Furthermore, phenoxylated dextran strongly adsorbs onto SWNTs, enabling SWNT fluorescence even in solid-state films in which metallic SWNTs co-exist. By bypassing ultra-centrifugation, this low-energy dispersion scheme can potentially be scaled up to industrial production levels.

show abstract

Section: Suspension Ability Of P-dextranmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Highly efficient exfoliation of individual single-walled carbon nanotubes by biocompatible phenoxylated dextran

Kwon¹,

Lee²,

Choi³

et al. 2013

Nanoscale

Self Cite

View full text Add to dashboard Cite

show abstract

“…al. [ 25 ] These results indicate that phenoxylated dextran strongly binds to the SWNT surface due to the phenoxylated dextran aromatic groups and not easily detach from SWNT surfaces, enabling high colloidal stability of pD-SWNT even in the blood stream of human body, which will be discussed in the later part of this study. Figure 2 d represents UV-vis-NIR absorption spectra of pD-SWNT dispersed in water together with those of SDS-SWNT (Figure 2 c) as a reference.…”

Section: Characterization Of Pd-swntmentioning

confidence: 75%

Highly Selective Photothermal Therapy by a Phenoxylated‐Dextran‐Functionalized Smart Carbon Nanotube Platform

Han

Kwon

et al. 2016

Adv Healthcare Materials

View full text Add to dashboard Cite

Near-infrared (NIR) photothermal therapy using biocompatible single-walled carbon nanotubes (SWNTs) is advantageous because as-produced SWNTs, without additional size control, both efficiently absorb NIR light and demonstrate high photothermal conversion efficiency. In addition, covalent attachment of receptor molecules to SWNTs can be used to specifically target infected cells. However, this technique interrupts SWNT optical properties and inevitably lowers photothermal conversion efficiency and thus remains major hurdle for SWNT applications. This paper presents a smart-targeting photothermal therapy platform for inflammatory disease using newly developed phenoxylated-dextran-functionalized SWNTs. Phenoxylated dextran is biocompatible and efficiently suspends SWNTs by noncovalent π-π stacking, thereby minimizing SWNT bundle formations and maintaining original SWNT optical properties. Furthermore, it selectively targets inflammatory macrophages by scavenger-receptor binding without any additional receptor molecules; therefore, its preparation is a simple one-step process. Herein, it is experimentally demonstrated that phenoxylated dextran-SWNTs (pD-SWNTs) are also biocompatible, selectively penetrate inflammatory macrophages over normal cells, and exhibit high photothermal conversion efficiency. Consequently, NIR laser-triggered macrophage treatment can be achieved with high accuracy by pD-SWNT without damaging receptor-free cells. These smart targeting materials can be a novel photothermal agent candidate for inflammatory disease.

show abstract

“…[23,[34][35][36] Open circuit voltage (V oc ) is an important parameter for evaluating the performance of organic solar cells. Traditional B3LYP [32,37] and long range corrected (LRC) functionals CAM-B3LYP [36,38] and tunable ωB97X [39] with 6-311+G(d) basis sets were used to calculate open circuit F I G U R E 1 Chemical structure of SubPC and subAPPCs with one, two, and three six-membered rings: C1, C2, and C3 voltage. B3LYP is the most common density functional used to calculate ground state and local excited states.…”

Section: Computational Detailsmentioning

confidence: 99%

“…In this section, the UV-Vis spectra of subPC and subAPPCs are showed in Figure 5 and Table 2. For simplicity and clarity, we only list the results of ωB97X functional because it has an optimized parameter ω for every molecule and the HOMO energy generated with tuned ωB97X [39] functional matches well with the IP of a molecule. [42,53] Besides, B3LYP is a traditional density functional and CAM-B3LYP is not tunable.…”

Section: Uv-vis Spectramentioning

confidence: 99%

A computational investigation on core‐expanded subphthalocyanines

Peng

Zheng

2019

Int J of Quantum Chemistry

View full text Add to dashboard Cite

Subazaphenalenephthalocyanines are the derivatives of boron subphthalocyanine chloride with a core‐expanded six‐membered ring, which have a wide absorption range in the visible region and seem to have great potential to be new photo‐electro materials. However, it is still an open question how the core expansion influences the electronic and optical properties of boron subphthalocyanine chloride. In the present work, three subazaphenalenephthalocyanine molecules, having one, two, and three six‐membered rings, are explored by using density functional theory. The relaxation energy, electronic structures, UV‐Vis spectra, and exciton binding energy of three molecules are calculated, and the open circuit voltages of subazaphenalenephthalocyanine/C60 solar cells are roughly predicted using an empirical equation. The results show that the planarity, the wavelength of absorption peaks, and HOMO energy increase gradually along with the increasing number of expanded rings, while the trends of open circuit voltage and relaxation energy are opposite. We find that the subazaphenalenephthalocyanine molecule with three six‐membered rings seems to have great potential to be a new donor material of organic solar cell because it has the smallest exciton binding energy and relaxation energy, and strong absorption strength in the visible region.

show abstract

A Compositional Window of Kinetic Stability for Amphiphilic Polymers and Colloidal Nanorods

Cited by 8 publications

References 49 publications

Highly efficient exfoliation of individual single-walled carbon nanotubes by biocompatible phenoxylated dextran

Highly efficient exfoliation of individual single-walled carbon nanotubes by biocompatible phenoxylated dextran

Highly Selective Photothermal Therapy by a Phenoxylated‐Dextran‐Functionalized Smart Carbon Nanotube Platform

A computational investigation on core‐expanded subphthalocyanines

Contact Info

Product

Resources

About