High-yield production of 2D crystals by wet-jet milling

Castillo, Antonio Esaù Del Rio; Pellegrini, Vittorio; Ansaldo, Alberto; Ricciardella, Filiberto; Sun, Haiyan; Marasco, Luigi; Buha, Joka; Dang, Zhiya; Gagliani, Luca; Lago, Emanuele; Curreli, Nicola; Gentiluomo, Silvia; Palazón, Francisco; Prato, Mirko; Oropesa‐Nuñez, Reinier; Tóth, Péter S.; Mantero, Elisa; Crugliano, M.; Gamucci, A.; Tomadin, Andrea; Polini, Marco

doi:10.1039/c8mh00487k

Cited by 160 publications

(208 citation statements)

References 148 publications

Supporting

Mentioning

203

Contrasting

Order By: Relevance

“…Statistical analysis indicates that the thickness and the lateral size of the flakes approximately follow log‐normal distributions peaked at ∼470 nm (Figure b) and ∼1.67 nm (Figure d), respectively. These results indicate that the WJM‐G flakes are mainly SLG/FLG flakes (SLG thickness ∼0.34 nm), in agreement with our previous works . Raman spectroscopy measurements were performed to assess the structural properties of the WJM‐G flakes (Figure e–f).…”

Section: Resultssupporting

confidence: 90%

“…The production of graphene flakes was carried out by means of a WJM approach, whose main steps are summarised in Figure a . Briefly, a dispersion of graphite in NMP flows in a pneumatic valve that pressurises this dispersion inside the processor, reaching high‐pressures (180–250 MPa) when passing through a sequence of nozzles having different size (from 0.3 to 0.1 mm of diameter) . The use of high‐pressure generates high shear forces that promote the exfoliation of the dispersed material .…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Flexible Graphene/Carbon Nanotube Electrochemical Double‐Layer Capacitors with Ultrahigh Areal Performance

et al. 2019

Self Cite

View full text Add to dashboard Cite

The fabrication of electrochemical double‐layer capacitors (EDLCs) with high areal capacitance relies on the use of elevated mass loadings of highly porous active materials. Herein, we demonstrate a high‐throughput manufacturing of graphene/carbon nanotubes hybrid EDLCs. The wet‐jet milling (WJM) method is exploited to exfoliate the graphite into single‐few‐layer graphene flakes (WJM‐G) in industrial volumes (production rate ca. 0.5 kg/day). Commercial single‐/double‐walled carbon nanotubes (SDWCNTs) are mixed with graphene flakes in order to act as spacers between the flakes during their film formation. The WJM‐G/SDWCNTs films are obtained by one‐step vacuum filtration of the material dispersions, resulting in self‐standing, metal‐ and binder‐free flexible EDLC electrodes with high active material mass loadings up to around 30 mg cm−2. The corresponding symmetric WJM‐G/SDWCNTs EDLCs exhibit electrode energy densities of 539 μWh cm−2 at 1.3 mW cm−2 and operating power densities up to 532 mW cm−2 (outperforming most of the reported EDLC technologies). The EDCLs show excellent cycling stability and outstanding flexibility even in highly folded states (up to 180°).

show abstract

Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Flexible Graphene/Carbon Nanotube Electrochemical Double‐Layer Capacitors with Ultrahigh Areal Performance

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…The diameter of the holes could be tuned by choosing the most suitable ion current; in our case holes of 60 nm were prepared. These nanoholes were then plugged with exfoliated graphene flakes by using electrophoretic deposition . An example of the prepared substrates is reported in Figure S11 of the Supporting Information.…”

Section: Methodsmentioning

confidence: 99%

Bio‐Assisted Tailored Synthesis of Plasmonic Silver Nanorings and Site‐Selective Deposition on Graphene Arrays

Giovannini

Ardini

Maccaferri

et al. 2019

Advanced Optical Materials

View full text Add to dashboard Cite

The spontaneous interaction between noble metals and biological scaffolds enables simple and cost‐effective synthesis of nanomaterials with unique features. Here, plasmonic silver nanorings are synthesized on a ring‐like protein, i.e., a peroxiredoxin (PRX), and used to assemble large arrays of functional nanostructures. The PRX drives the seeding growth of metal silver under wet reducing conditions, yielding nanorings with outer and inner diameters down to 28 and 3 nm, respectively. The obtained hybrid nanostructures are selectively deposited onto a solid‐state 2D membrane made of graphene in order to prepare plasmonic nanopores. In particular, the interaction between the graphene and the PRX allows for the simple preparation of ordered arrays of plasmonic nanorings on a 2D‐material membrane. This fabrication process can be finalized by drilling a nanometer scale pore in the middle of the ring. Fluorescence spectroscopic measurements in combination with numerical simulations demonstrate the plasmonic effects induced in the metallic nanoring cavity. The prepared nanopores represent one of the first examples of hybrid plasmonic nanopore structures integrated on a 2D‐material membrane. The diameter of the nanopore and the atomically thick substrate make this proof‐of‐concept approach particularly interesting for nanopore‐based technologies and applications such as next‐generation sequencing and single‐molecule detection.

show abstract

“…Graphene, with a one‐atom‐thick two‐dimensional (2 D) layer structure, is regarded as a promising electrode material for supercapacitors possessing high power density and extremely long cycle life because of its large theoretical specific surface area (SSA), strong mechanical strength, and high intrinsic electrical conductivity . The preparation of graphene can be realized by various methods, such as micromechanical exfoliation of graphite, reduction of graphene oxide, chemical vapor deposition (CVD), or liquid‐phase exfoliation . The micromechanical exfoliation method, an extremely simple method for the preparation of graphene, was the earliest known method to prepare graphene.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the presence of oxygen‐containing functional groups increases the internal resistance, leading to a decrease in the electrical conductivity, and the SSA of rGO is usually less than 1000 m 2 g −1 . The liquid‐phase exfoliation method is based on exploiting cavitation or shear forces in the liquid solvent to obtain single‐ or few‐layered graphene flakes . The obtained high‐quality graphene can be applied in highly sophisticated equipment.…”

Section: Introductionmentioning

confidence: 99%

High Capacitive Energy Storage of Nest‐Like Porous Graphene Microspheres Electrode with High Mass Loading

Wang

Song

et al. 2019

ChemSusChem

View full text Add to dashboard Cite

Nest‐like porous graphene microspheres (NPGMs) are grown by using a chemical vapor deposition (CVD) method in a fluidized bed reactor from methane and basic magnesium carbonate microspheres (synthesized by a stirring‐induced crystallization approach) as carbon source and template, respectively. The CVD‐derived NPGMs have a few‐layer structure and high electrical conductivity, as well as a three‐dimensional individual macroarchitecture accompanied with well‐developed pore channels and great structural integrity. As the electrode for a symmetric supercapacitor, the effect of different mass loadings for NPGMs‐based electrodes on the capacitive energy‐storage performance is investigated. Superior electrochemical properties with respect to gravimetric, areal, and total capacitances, rate capability, and durability are shown by the NPGMs‐based symmetric supercapacitors, even at mass loadings up to 10 mg cm−2. Moreover, the electrochemical behavior of the NPGMs‐based electrode is much superior to those of two‐dimensional lamella‐like graphene and commercial activated carbon.

show abstract

High-yield production of 2D crystals by wet-jet milling

Abstract: A novel liquid-phase exfoliation of layered crystals enables the production of defect-free and high quality 2D-crystal dispersions on a large scale.

Cited by 160 publications

References 148 publications

Flexible Graphene/Carbon Nanotube Electrochemical Double‐Layer Capacitors with Ultrahigh Areal Performance

Flexible Graphene/Carbon Nanotube Electrochemical Double‐Layer Capacitors with Ultrahigh Areal Performance

Bio‐Assisted Tailored Synthesis of Plasmonic Silver Nanorings and Site‐Selective Deposition on Graphene Arrays

High Capacitive Energy Storage of Nest‐Like Porous Graphene Microspheres Electrode with High Mass Loading

Contact Info

Product

Resources

About