Carbon Nanotube Hybrid Research Articles

Nonlinear analysis of Darcy-Forchheimer flow in EMHD ternary hybrid nanofluid (Cu-CNT-Ti/water) with radiation effect

This article aims to explore the influence of non-linear Darcy-Forchheimer on the EMHD (Electromagnetohydrodynamic) flow of a couple stress water-based nanofluid, hybrid nanofluid, and ternary hybrid nanofluid with thermal radiation on a stretching sheet. The significant improvement in thermal efficiency and the energy exchange rate used in fuel dynamics and vehicle cooling has led to an increasing understanding of hybrid nanofluids. However, the concept of a water-based nanofluid containing three distinct solid nanoparticles (referred to as a ternary hybrid nanofluid) is nevertheless remarkable. The ternary hybrid nanoparticles copper (Cu), carbon nanotubes (CNT), and titanium (Ti) are suspended in the base fluid water (H2O). Established mathematical equations are nonlinear, which are resolved for velocity, the temperature in addition to the skin friction coefficient, and the rate of heat transfer by using bvp4c with MATLAB solver. The connotations of innumerable control parameters are exposed through graphical picturization and discussed in detail. The results were compared with specific references, and a righteous compromise was found. Increasing inertia coefficient values causes a decrease in velocity, but temperature causes a contradictory behavior in ternary hybrid nanofluids. The temperature profile is raised for the higher values of the Eckert number in the case ofn=0.5 and n=1.5. The ternary hybrid nanofluid has more influence than the nanofluid and hybrid nanofluid in the temperature profile.

Dry and frost resistance conductive hydrogels based on carbon nanotubes hybrids for use as flexible strain sensor

Dry and frost resistance conductive hydrogels based on carbon nanotubes hybrids for use as flexible strain sensor

Structure and interface engineering on polypyrrole-deposited conductive paper originating from nature wood enables high performance flexible all-solid-state supercapacitors

Paper is an ideal substrate for manufacturing flexible electrodes because of its lightweight, inherent mechanical flexibility, and unique structure. However, the traditional bottom-up method of manufacturing paper-based electrode is time-consuming and the active material is easy to fall off. Here, we report a polypyrrole-deposited conductive paper (PCP), which is fabricated by chemical treatment, mechanical compression, and chemical polymerization of natural wood. The post densification process eliminates the vertical arrangement of wood cell cavities, and the formed wood fiber/multi-walled carbon nanotubes hybrid conductive network has high flexibility. The further deposited polypyrrole (PPy) conductive layer can effectively boost the ion transport between electrode/electrolyte interface and increase the active center of interface reaction. Based on the well-designed electrode structure and good interfacial reaction kinetics, the resulting PCP with a PPy mass loading of only 2.4 mg·cm−2 indicates a high areal capacitance of 275.8 mF cm−2 at 20 mV·s−1 and good cycling stability. All-solid-state symmetric supercapacitor exhibits capacitance of 308.3 mF·cm−2. This structure and interface design concept show a promising method for preparing high-performance and scalable biomass-based flexible electronic devices.

Synergetic effects of hybrid nano-blended cement on mechanical properties of conventional concrete: Experimental and analytical evaluation

The present experimental and analytical study aims to modify conventional cement to create a higher strength-to-weight ratio concrete using hybrid nanomaterials, i.e., Carbon Nanotubes (CNTs) and Nano-Silica (NS), as a partial replacement for cement (Nano-blended cement). In this study, three CNTs and four NS contents were chosen to evaluate the mechanical properties of concrete. 234 tests for specimens at 7, 28, and 90 days were carried out to achieve the optimum composition of the nanoparticles for the compressive strength and splitting tensile strength. Test results of the specimens examined at 28 days illustrate that the compressive strength and tensile strength were improved by 125 % by the inclusion of 0.1 % CNT + 1.5 % NS and by 110 % by using 0.5 % CNT + 1.0 % NS, respectively. Moreover, the strength-enhancement mechanism of novel concrete was visualized by scanning electron microscopy (SEM). Since conventional high-performance concretes, due to the high amount of cement required, are not environmentally friendly, the novel Nano-blended cement can create high-performance concretes without adding more cement or any concrete ingredients. In addition, using Nano-blended concrete results in a lighter structure with smaller members' size and a more lightweight foundation, and therefore is more cost-effective and sustainable than conventional concrete.

Efficient, Robust, and Flame-Retardant Electrothermal Coatings Based on a Polyhedral Oligomeric Silsesquioxane-Functionalized Graphene/Multiwalled Carbon Nanotube Hybrid with a Dually Cross-Linking Structure.

Graphene electrothermal coatings have attracted considerable attention in recent years due to their important application prospects in a broad range of areas. So far, lots of strategies have been explored for producing them. However, these strategies usually involve a complicated process with sophisticated conditions, limiting their scalable applications. Herein, we demonstrate a facile strategy for preparing efficient, robust, and flame-retardant electrothermal coatings from liquid-phase exfoliated graphene, by combining with multiwalled carbon nanotubes (MWCNTs) and polyhedral oligomeric silsesquioxane (POSS) nanoparticles. This relies on the use of a hyperbranched polyethylene copolymer that simultaneously bears UV-reactive moieties and POSS terminal groups. As a stabilizer, the copolymer can effectively promote the exfoliation of both graphite and MWCNTs in common organic solvents under sonication, rendering the POSS-functionalized graphene and MWCNTs well dispersible in the solvent. From their dispersions, POSS-functionalized graphene/MWCNT hybrid electrothermal coatings have been successfully prepared simply by vacuum filtration and UV irradiation under mild conditions. It has been confirmed that a dually cross-linking structure can be formed in the hybrid system. This significantly improves the thermal resistance of resultant coatings, which remain exhibiting a stable work state even at a temperature high as 280 °C without the occurrence of flammation. Meanwhile, this also endows them with excellent electrothermal performance and service stability. At a relatively low voltage, 15 V, the steady temperature can reach 188.4 °C, with a response time < 30 s; after being alternately folded for 2700 cycles or scraped 200 times, the coating still maintains a stable state. In particular, the process involved is relatively simple with mild conditions. With these features, the coatings obtained herein may find their important applications in the area of wearable devices and household heating systems.

Facile Construction of Three-Dimensional Architectures of a Nanostructured Polypyrrole on Carbon Nanotube Fibers and Their Effect on Supercapacitor Performance

Conducting polymer and carbon nanotube hybrids have been researched intensively in recent years for electrodes of fiber-shaped supercapacitors (FSSCs) toward flexible and wearable energy storage devices. Here, three-dimensional (3D) hierarchical polypyrrole (PPy)/carbon nanotube fiber (CNTF) architectures have been prepared by a facial electrodeposition method for flexible FSSC electrodes. PPy nanoparticles, vertically aligned nanowire arrays (VANAs), and nanowire networks were synthesized on CNTFs, respectively, to construct three types of 3D architectures by controlling the electrodeposition condition of PPy. The influence of the 3D architectures of PPy/CNTF electrodes on the performance of the assembled quasi-solid-state FSSCs has been carefully studied. The FSSCs with PPy VANAs showed a much higher specific capacitance than that with PPy nanoparticles because the hierarchical porous structure of PPy VANAs provides a higher accessibility of electrolytic ions and a higher Coulombic efficiency than that with the PPy nanowire network. The PPy VANA-/CNTF-based FSSCs displayed high flexibility, stability, and a specific capacitance of 178.14 F g–1 at 0.4 A g–1, which is much higher than that based on common PPy cauliflower-like film/CNTF electrodes (92.06 F g–1) and pure CNTF electrodes (8.48 F g–1) under the same conditions, demonstrating the great advantages of the 3D hierarchical structure.

Microstructures, thermal and mechanical properties of Al–Si-CNT composites for thermal management applications

In this work, a novel electronic packaging material, Al–Si-CNT composite, is fabricated by ball milling and hot extrusion of Al20Si powder blended with different amount of carbon nanotubes (CNTs). The influences of CNTs content on the microstructures, thermal properties and mechanical properties of the composites are investigated. The ball milling produces flake powders in which CNTs, accompanied by refined Si particles and in-situ formed k'-Al2O3, are uniformly dispersed in the Al matrix. The homogenous microstructures are subsequently inherited by the extruded composites. Compared to the Al20Si sample without CNT addition, the CNT-contained composites are more thermally stable and resistant to structural coarsening caused by Ostwald ripening effect. The composite with 2 wt % CNT content exhibits the best properties among all samples. It has a high tensile yield strength ∼235 MPa, and low thermal expansion coefficient ∼16.8 × 10−6 K−1 (at 50–400 °C) as well as acceptable thermal conductivity ∼102 Wm−1K−1 (at 50–400 °C). This study using hybrid reinforcements Si and CNTs to enhance the Al matrix composite is inspiring to design high performance thermal management materials.

Multifunctional and Washable Carbon Nanotube-Wrapped Textile Yarns for Wearable E-Textiles.

Carbon nanotube (CNT) yarns are promising for wearable electronic applications due to their excellent electromechanical and thermal properties and structural flexibility. A spinning system was customized to produce CNT-wrapped textile yarns for wearable applications. By adjusting the spinning parameters and core yarn, a highly tailored hybrid CNT yarn could be produced for textile processing, e.g., knitting and weaving. The electrical resistance and mechanical properties of the yarn are influenced by the core yarn. The high flexibility of the yarn enabled state-of-the-art three-dimensional (3D) knitting of the CNT-wrapped yarn for the first time. Using the 3D knitted technology, CNT-wrapped textile yarns were seamlessly integrated into a wrist band and the index finger of a glove. The knitted structure exhibited a large resistance change under strain and precisely recorded the signal under the different movements of the finger and wrist. When the knitted fabric was connected to a power source, rapid heating above skin temperature was observed at a low voltage. This work presents a novel hybrid yarn for the first time, which sustained 30 washing cycles without performance degradation. By changing the core yarn, a highly stretchable and multimodal sensing system could be developed for wearable applications.

Co nanoparticles/N-doped carbon nanotubes hybrids as highly efficient catalysts for microwave-induced catalytic degradation of tetracycline

Large-scale magnetic Co nanoparticles/N-doped carbon nanotubes (Co@NCNTs) hybrids have been designed by pyrolyzing the mixture of cobalt nitrate and melamine for microwave (MW)-induced tetracycline (TC) degradation. The results demonstrated that Co@NCNTs-5, annealed from cobalt nitrate and melamine (mole ratio: 1:5), possessed a good MW absorption ability, resulting in excellent degradation performance towards TC. Specifically, 99.5 % TC (20 mg/L, natural pH) could be removed after 6 min of MW irradiation (520 W) in the presence of Co@NCNTs-5. Meanwhile, Co@NCNTs-5 exhibited competitive degradation efficiency over TC at various concentrations (20–100 mg/L) and pH values (3−8). Results of reusability experiments identified the magnetic recovery ability and stability of Co@NCNTs-5. Based on free radical experiments and electron paramagnetic resonance (EPR) results, HO• and O2−• radicals participated in the catalytic degradation process. The degradation pathway of TC was proposed with the assistance of ultrahigh-performance liquid chromatography-mass spectrometry (UPLC-MS). This work develops a facile, low-cost and large-scale method to synthesize Co@NCNTs, which demonstrates great potential in MW-induced catalytic treatment of antibiotic pollutants as high-efficient catalysts.

Ultralight coaxial fiber-shaped zinc-ion hybrid supercapacitor with high specific capacitance and energy density for wearable electronics

Zinc-ion hybrid supercapacitors (ZHSs) with a fiber-shaped form are strongly desired for flexible electronics, but the construction still remains a great challenge. Herein, by using a graphene/multi-walled carbon nanotubes (MWCNTs) hybrid tube (GMHT) as cathode and a 2D nanostructured Zn modified graphene/MWCNTs tube (Zn@GMHT) as anode, we, for the first time, fabricate a ‘sword-scabbard’ like coaxial fiber-shaped all-solid-state ZHSs. The core-sheath structure notably accelerates electron transport and ion diffusion, and in comparison with the commonly used Zn metal electrode, an astounding 84.1 % anode mass reduction has been realized. Specifically, the optimized GMHT//Zn@GMHT ZHSs presents a superb length specific capacitance of 470.6 mF cm−1 (relevant to an outstanding areal/volumetric capacitance of 735.3 mF cm−2/19.6 F cm−3) at the current density of 1 mA cm−1, which is obviously better than most of the reported fiber-shaped ZHSs. Meanwhile, the device shows a maximum energy density of 167.3 μWh cm−1 at the power density of 533.5 μW cm−1, and an attractive power density of 5988.1 μW cm−1 at 16.8 μWh cm−1. Moreover, the capacitance retentions of 84.6 % after 5000 charge–discharge cycles and 100–88.3 % under bending angles from 0 to 150° demonstrate great electrochemical stability and mechanical flexibility of the device. The admirable properties, together with this creative architecture and ultralight function, endow GMHT//Zn@GMHT with a broad prospect in wearable application.

Magneto-hydrodynamic boundary layer flow and heat transfer of hybrid carbon nanotube over a moving surface

The boundary layer flow and heat transfer of hybrid carbon nanotubes over a moving surface with magneto-hydrodynamic effect are studied numerically in this paper. Single-wall (SWCNT) and multi-wall (MWCNT) carbon nanotubes are combined with water as the base fluid to form hybrid carbon nanotubes. The governing partial differential equations were transformed into a set of nonlinear ordinary differential equations using the similarity transformation, which were then numerically solved in the Matlab software using bvp4c. The influence of the nanoparticle volume fraction, magnetic parameter and velocity ratio parameter, on velocity and temperature profiles, local skin friction and local Nusselt number are discussed and presented in graphical forms. The results show that dual solutions appear when the free stream and plate move in the opposite direction, and the rate of heat transfer for hybrid carbon nanotubes is higher than viscous fluid and carbon nanotubes.

A novel catalyst derived from Co-ZIFs to grow N-doped carbon nanotubes for all-solid-state supercapacitors with high performance.

Carbon nanotubes (CNTs) have been widely used as electrode materials for electrochemical energy storage devices (e.g., supercapacitors) due to their excellent chemical and physical properties. However, conventional approaches (e.g., electron-beam vapor deposition and atomic layer deposition) to fabricate catalysts for the growth of CNTs are complex and demand high energy consumption. Herein, we report a facile method to synthesize catalysts derived from cobalt-containing zeolitic imidazolate frameworks (Co-ZIFs), which is exploited to in situ construct the three-dimensional (3D) CNT hybrid materials for all-solid-state supercapacitors. In brief, Co-ZIFs with a controllable structure is first grown on the inner porous surface of carbon foams pyrolyzed from commercial melamine foams, followed by thermal annealing and chemical vapor deposition to grow CNTs, achieving 3D free-standing CNT-based hybrids. The well-distributed Co-ZIFs in the carbon foam enable the grown CNTs with uniform structures and morphologies. Using the fabricated CNT-based hybrid as electrodes, the assembled all-solid-state supercapacitors show a high specific capacitance of 19.4 mF cm-2 at a current density of 0.5 mA cm-2, which could be further optimized to as high as 871.8 mF cm-2 by incorporating the pseudocapacitive material of manganese dioxide in CNT-based hybrids. This study provides a facile solution approach to fabricate the catalyst for the growth of a CNT inner porous substrate; the resultant 3D free-standing hybrids could be used as efficient electrodes for high-performance energy storage devices beyond supercapacitors.

Highly proton conductive and mechanically robust SPEEK composite membranes incorporated with hierarchical metal–organic framework/carbon nanotubes compound

The preparation of composite proton exchange membranes (PEMs) by incorporating metal- organic frameworks (MOFs) into polymeric substrates has become a hot research topic in the field of fuel cells in recent years. In this work, ZSC was prepared by in-suit reacted with the precursor of ZIF-8 (Zeolitic Imidazolate Framework 8) and silica coated carbon nanotubes (SiO2@CNTs). The as-prepared ZSC was introduced into sulfonated poly (ether ether ketone) (SPEEK) to fabricate a series of composite proton exchange membranes SPEEK/ZSC-x (where x is the mass percentage between ZSC and SPEEK). The coating treatment of carbon nanotubes (CNTs) by silica not only can avoid the direct contacting among CNTs and enhance the dispersion in SPEEK matrix, but also realize the regulation of nucleation and crystallization process of ZIF-8 particles along the morphology of CNTs. The obtained SPEEK/ZSC composite membranes show improved performance owing to construction of interconnected network architecture and the compositional advantages of the ZSC materials. The proton conductivity of SPEEK/ZSC-0.5 membrane was up to 38.10 mS/cm at 80 °C, which was 1.8 times that of the pure SPEEK membrane (21.12 mS/cm) under the same condition. Moreover, the SPEEK/ZSC-0.5 showed better performance with peak power density of 38.9 mW/cm2 in 2 M methanol solution, which was 1.3 times that of the pure SPEEK membrane of 30.3 mW/cm2, the further stability tests confirmed that the composite film maintained good voltage stability even after 100 h of continuous operation at 80 °C. These results indicate that the strategy of construction MOFs and functional CNTs hybrid materials show promising application prospects in the preparation of high performance PEMs.

Preparation and properties of CNTs-Cu hybrids/epoxy superhydrophobic and anticorrosive coatings

In this work, hydrophobized copper powders combined siloxane-modified carbon nanotubes (SHMWCNTs) to obtain intertwined hybrids of carbon nanotubes and copper (CNTs-Cu hybrids), and superhydrophobic CNTs-Cu hybrids/epoxy coatings were prepared on the surface of AH36 carbon steel by drop coating. The surface morphology and wettability of coatings were changed by adjusting the ratios of SHMWCNTs to hydrophobized copper powders. The obtained coating can show a water contact angle of 167.2°, a water sliding angle of 2.9°, a plant oil contact angle of 134.3°, and self-cleaning properties. The coating maintains superhydrophobicity after 300 tape-peeling times, exhibiting excellent mechanical durability. The fouled area percentages of chlorella on the coating and a pure epoxy resin were 0.23(±0.07)% and 12.18(±1.22)%, respectively, displaying anti-biofouling resistances. The coating has excellent corrosion resistance, and its corrosion current density reached 9.55 × 10-8 A/cm2.

RGO/MWCNTs-COOH 3D hybrid network as a high-performance electrochemical sensing platform of screen-printed carbon electrodes with an ultra-wide detection range of Cd(II) and Pb(II)

• Developed a high-performance SPCE sensor based on rGO-MWCNTs-COOH 3D hybrid. • The detection of Cd 2+ and Pb 2+ with an ultra-wide linear range was performed. • The electrochemical behaviour of modified SPCE reveals the sensing mechanism. • Shows an application potential for directly detecting high-concentration samples. In this study, we develop a high-performance screen-printed carbon electrodes (SPCE) based on reduced graphene oxide (rGO) - carboxy-functionalized multi-walled carbon nanotubes (MWCNTs-COOH) hybrids for simultaneous detection cadmium ions (Cd 2+ ) and lead ions (Pb 2+ ). The surface morphology and electrochemical behaviour of the modified SPCE was characterised by SEM, AFM, EIS and CV. The control steps of the redox reaction on the modified SPCE and the influence of the morphology of modified SPCE on the shape of stripping peak have also been studied. In addition, Nafion and in-situ bismuth film (BFE) methods were introduced in this detection system to enhance the stability and stripping performance. Under the optimal experimental conditions, the Nafion/rGO-MWCNTs-COOH/SPCE showed excellent catalytic activity towards Cd 2+ and Pb 2+ (pH = 4.5) with a significantly increased SWASV peak current compared to the unmodified SPCE. The developed sensor obtains an ultra-wide dynamic concentration range from 0.1 to 1350 μg·L −1 due to the introduction of 3D hybrid material and the optimisation of the detection parameters. The limit of detection (S/N = 3) for Cd 2+ and Pb 2+ was 0.04 μg·L −1 and 0.02 μg·L −1 , respectively. Furthermore, the applicability of the developed SPCE was demonstrated by detecting Cd 2+ and Pb 2+ in tap water and lake water.

Synergistic effect of two-dimensional additives on carbon nanotube film electrodes towards high-performance all-solid-state flexible supercapacitors

Flexible supercapacitors (SCs) have attracted growing interest as the power source for portable and wearable electronics. In the present work, we report the CNTs (Carbon Nanotubes) buckypaper integrated with electroactive 2D materials including graphene, graphene oxide (GO), and transition metal sulphides (TMDs), especially tin sulphide (SnS2). The flexible and free-standing, interface-enhanced CNT paper having homogeneously dispersed 2D materials was prepared using a traditional scalable casting method. The hybridized CNT films were thoroughly characterized to elucidate their structural and surface properties. Finally, such hybrid CNT films were used as free-standing electrodes without any binder for the fabrication of flexible-solid-state supercapacitor (FSSSs) devices. In the FSSS, the electrochemical interactions between hybrid CNT paper electrodes and a polymer gel electrolyte were studied. In the symmetric configuration, the CNT-SnS2 electrodes reach the highest areal and volumetric capacitance of 533 mF/cm2 and 63 mF/cm3, respectively, almost four times that of pristine CNT electrodes, whereas CNT-GO-based electrodes display high-rate capability. The CNT-SnS2-based symmetric FSSS devices exhibit an extended voltage window of 1.5 V with a high capacitance of 133 mF/cm2 and show high cyclic stability for 5000 cycles under 180 0 bendings.

High-Performance FeCo/NC-Mo2TiC2/Carbon Nanotube Hybrid Support Catalyst toward Oxygen Reduction for Alkaline Anion Exchange Membrane Fuel Cell

High-Performance FeCo/NC-Mo₂TiC₂/Carbon Nanotube Hybrid Support Catalyst toward Oxygen Reduction for Alkaline Anion Exchange Membrane Fuel Cell

Effect of Edge-Chemistry on Graphene-Based Hybrid Electrode Materials for Energy Storage Device

Owing to the rapid climate change, a high-performance energy storage system (ESS) for efficient energy consumption has been receiving considerable attention. ESS, such as capacitors, usually has issues with the ion diffusion of electrode materials, resulting in a decrease in their capacitance. Notably, appropriate pore diameter and large specific surface area (SSA) may result in an effective ion diffusion. Therefore, graphene and multi-walled carbon nanotube (graphene@MWCNT) hybrid nanomaterials, with covalent bonds between the graphene and MWCNT, were prepared via an edge-chemistry reaction. The properties of these materials, such as high porosity, large SSA, and high electroconductivity, make them suitable to be used as electrode materials for capacitors. The optimal ratio of graphene to MWCNT can affect the electrochemical performance of the electrode material based on its physical and electrochemical properties. The supercapacitor using optimal graphene-based hybrid electrode material exhibited highest specific capacitance value as 158 F/g and excellent cycle stability.

Energy, economic and environmental analysis of an evacuated tube solar collector using hybrid nanofluid

Hybrid nanofluids are novel advanced fluids that improve sustainable energy production. In the current study, the performance of the evacuated tube solar collector is experimentally investigated using hybrid nanofluids of magnesium oxide and multi-walled carbon nanotubes with water base. The experiments are carried out at various weight ratios and at three flow rates ranging from 1 to 3 L/min. The results show an improvement in the optical efficiency of the collector by up to 78.1% with the increase in the weight ratio of multi-walled carbon nanotubes nanoparticles. The average heat energy gain has increased from 240 W to 495 W. The utilization of the hybrid nanofluid shows an enhancement in the inlet–outlet temperature difference of the fluid by 56% and a reduction in the area of the collector by 36%. Economic and environmental analyses are conducted to investigate the role of magnesium oxide/multi-walled carbon nanotubes hybrid nanofluid in energy savings and CO2 emission reduction. The period for Carbon Payback Time and Simple Payback Period declines by 36.2% and 34.6%, respectively, for magnesium oxide/multi-walled carbon nanotubes (50:50) hybrid nanofluid. The Energy Yield Factor reaches 27.09 throughout the lifetime of the collector. According to the findings, magnesium oxide/multi-walled carbon nanotubes hybrid nanofluid is a viable working fluid alternative to multi-walled carbon nanotubes nanofluid that provides enhanced properties and a more economical raw material cost.

Hybrid, dual visible and near-infrared fluorescence emission of (6,5) single-walled carbon nanotubes modified with fluorescein through aryl diazonium salt chemistry

The aryl diazonium salt chemistry offers enhancement of near-infrared (NIR) emission of single-walled carbon nanotubes (SWCNTs), although, the attachment of functional molecules which could bring hybrid properties through the process is underdeveloped. In this work, we utilize aryl diazonium salt of fluorescein to create sp 3 defects on (6,5) SWCNTs. We study the influence of pH on the grafting process identifying that pH 5–6 is necessary for a successful reaction. The fluorescein-modified (6,5) SWCNTs (F-(6,5) SWCNTs) exhibit red-shifted E 11* emission in the NIR region attributed to luminescent sp 3 defects, but also visible (Vis) fluorescence at 515 nm from surface-attached fluorescein molecules. The fluorescence in both Vis and NIR regions of F-(6,5) SWCNTs exhibit strong pH-dependency associated with the dissociation of fluorescein molecules with an indication of photoinduced-electron transfer quenching the Vis emission of fluorescein dianion. The F-(6,5) SWCNTs could potentially be used for dual-channel medical imaging as indicated by our preliminary experiments. We hope that our research will encourage new, bold modifications of SWCNTs with functional molecules introducing new, unique hybrid properties.