Highly Selective Dispersion of Single-Walled Carbon Nanotubes via Polymer Wrapping: A Combinatorial Study via Modular Conjugation

Gerstel, Peter; Klumpp, Stefanie; Hennrich, Frank; Poschlad, Angela; Meded, Velimir; Blasco, Eva; Wenzel, Wolfgang; Kappes, Manfred M.; Barner‐Kowollik, Christopher

doi:10.1021/mz400472q

Cited by 56 publications

(62 citation statements)

References 45 publications

(17 reference statements)

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“…[169,170] However, these polymers have been observed to wrap around CNTs and are difficult to remove due to their strong interaction with the CNTs, and therefore the sorted semiconducting CNTs have limited use as channel materials for TFTs. [171] After separation of semiconducting CNTs, an imine-based conjugated polymer can be depolymerized into monomers and be cleanly removed under mild acidic conditions, yielding polymer-free semiconducting CNTs, as shown in Figure 5b. [172] It is desired to use a recyclable polymer to separate semiconducting CNTs, because the costs of most conjugated polymers are comparable or even higher than those of CNTs.…”

Section: Sorted Carbon Nanotube Inksmentioning

confidence: 99%

All‐Carbon Thin‐Film Transistors as a Step Towards Flexible and Transparent Electronics

Sun

Liu

Ren

et al. 2016

Adv Elect Materials

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silicon wafer, TFTs can be fabricated on various types of rigid or flexible substrates. [1] TFTs fabricated on glass are primarily used for driving circuits in the liquid-crystal displays of televisions, computer monitors, and mobile phones, etc. Well-established TFT technologies based on amorphous silicon and polycrystalline silicon are well-suited for large-area, highresolution panels, e.g., six pieces of 65-and 75-inch TFT arrays can be fabricated on a 10.5th generation glass substrate. [2] However, TFTs based on these silicon-based semiconductors still face challenges in flexible and transparent applications, which would allow circuit integration on curved and non-rigid surfaces and in multi-layer packaging, e.g., head-up displays on windshields, informational displays on eyeglasses and transparent electronic skin in wearable electronics. [3] In terms of the materials used to construct flexible and transparent devices, not only the transistor channel but also the dielectric layers and metallic interconnects should have excellent flexibility and transparency. [4] The following factors play critical roles in the selection of channel materials: carrier mobility, temperature of material preparation, flexibility, large area availability, cost and stability. Carrier mobility is an important parameter to characterize the drift velocity of electrons or holes in a semiconductor under an applied electric field. [5] A high mobility corresponds to a high operating speed of the TFTs and their circuits. The only advantage of low-temperature polycrystalline silicon is its relatively high mobility. [6] Amorphous oxide semiconductors, including indium gallium zinc oxide, have a modest mobility and are costly due to the use of noble metal elements. [7] Hydrogenterminated amorphous silicon has modest properties in carrier mobility, large-area and flexibility, [1] and organic semiconductors are better suited for flexible and transparent TFTs except for their shortcomings of low mobility and poor environmental stability. [8] On the other hand, normal metal electrodes, such as gold, silver, aluminum and copper, cannot be used to form transparent electrodes due to their poor light transmittance. Both transparent indium tin oxide (ITO) electrodes and opaque metal electrodes suffer from flexibility constraints and can usually tolerate strains of less than 2%. [9][10][11] Therefore, the discovery of new types of robust channel and electrode materials is essential to achieve transparent, flexible, and even stretchable electronics. [12] Carbon nanomaterials, such as carbon nanotubes (CNTs) and graphene, have attracted great attention for potential use in flexible and transparent electronics since their discovery in the last two decades, [13,14] owing to their excellent properties Carbon nanotubes and graphene have attracted great attention for potential applications in flexible and transparent electronics, owing to their exceptional properties including very high electrical conductivity, optical transmittance, mechanical strength and f...

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Section: Sorted Carbon Nanotube Inksmentioning

confidence: 99%

All‐Carbon Thin‐Film Transistors as a Step Towards Flexible and Transparent Electronics

Sun

Liu

Ren

et al. 2016

Adv Elect Materials

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“…However, these strategies can affect the conjugated system of the CNT sidewalls and introduce structural defects that result in poorer nanotube properties [29]. Alternatively, non-covalent modifications consist in the physical adsorption and/or wrapping of polymers [30][31][32][33][34] or surfactants [35] to the CNT surface without disturbing the π system of the graphene sheets. For instance, it has been reported that the adsorption of short-chain polymers containing aromatic moieties causes an effective debundling, and the nanotube bundle decreases in size as the polymer concentration is reduced [36].…”

Section: Introductionmentioning

confidence: 99%

Quenching of fluorene fluorescence by single-walled carbon nanotube dispersions with surfactants: application for fluorene quantification in wastewater

et al. 2015

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The fluorescence of fluorene in aqueous solutions of surfactants of different natures, anionic sodium dodecylsulphate (SDS), cationic cetyltrimethyl ammonium chloride (CTAC) and non-ionic polyoxyethylene-23-lauryl ether (Brij 35), as well as in single-walled carbon nanotube (SWCNT) dispersions in these surfactants, has been studied and compared. A fluorescence quenching phenomenon has been observed in the presence of SWCNT, the effect being stronger for dispersions in CTAC, related to the improved dispersion capability of this surfactant as revealed by microscopic observations and its stronger adsorption onto the SWCNT surfaces as inferred from the Raman spectra. SWCNT interact with fluorene causing a fluorescence quenching. The fluorescence intensity ratio, calculated in the absence and in the presence of SWCNT, follows the SternVolmer equation. For the CTAC concentration that provides the highest quenching effect, the analytical characteristics of the fluorimetric method like sensitivity, detection and quantification limits, repeatability, reproducibility and robustness have been calculated. Results demonstrate that it is possible to determine fluorene in a fortified wastewater sample in aqueous solutions of CTAC and SWCNT/CTAC dispersions, showing recoveries close to 100 %. The quenching effect found in this work could be useful for the development of an optical device that uses SWCNT-based receptors for fluorene detection and quantification in aqueous surfactant solutions.

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“…length) for applications [18], including in vivo behavior. While CNT chemical reactivity has been well-established over the years to produce a variety of functionalization protocols over a range of conditions [19][20][21], new routes and mechanisms continue to emerge [22][23][24][25][26]. Briefly, there are two main methods: non-covalent and covalent functionalization, both aimed at reducing the tendency of hydrophobic, pristine CNTs to aggregate together into bundles that are difficult to disperse and handle.…”

Section: Cnt Functionalizationmentioning

confidence: 99%

The winding road for carbon nanotubes in nanomedicine

et al. 2015

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Carbon nanotubes (CNTs) are recognized as promising nanomaterials for technological advancement. However, the stigma of structural similarity with asbestos fibers has slowed down progress of CNTs in nanomedicine. Nevertheless, it also prompted thorough studies that have revealed that functionalized CNTs (fCNTs) can biologically behave in a very different and safer manner. Here we review pristine and fCNT fate in biological settings, focusing on the importance of protein interaction, formation of the protein corona, and modulation of immune response. The emerging consensus on the desirable fCNT properties to achieve immunological neutrality, and even biodegradation, shows great promise for CNT adoption in medicine

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Highly Selective Dispersion of Single-Walled Carbon Nanotubes via Polymer Wrapping: A Combinatorial Study via Modular Conjugation

Cited by 56 publications

References 45 publications

All‐Carbon Thin‐Film Transistors as a Step Towards Flexible and Transparent Electronics

All‐Carbon Thin‐Film Transistors as a Step Towards Flexible and Transparent Electronics

Quenching of fluorene fluorescence by single-walled carbon nanotube dispersions with surfactants: application for fluorene quantification in wastewater

The winding road for carbon nanotubes in nanomedicine

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