A5004309474- Carbon Nanotubes in Composites
- Graphene research and applications
- Conducting polymers and applications
- Nanowire Synthesis and Applications
- Fullerene Chemistry and Applications
- Nanotechnology research and applications
- Catalytic Processes in Materials Science
- Inhalation and Respiratory Drug Delivery
- Diamond and Carbon-based Materials Research
- Perovskite Materials and Applications
- Mechanical and Optical Resonators
- Thermochemical Biomass Conversion Processes
- Organic Electronics and Photovoltaics
- nanoparticles nucleation surface interactions
- Coagulation and Flocculation Studies
- Electrocatalysts for Energy Conversion
- Aerosol Filtration and Electrostatic Precipitation
- Electrohydrodynamics and Fluid Dynamics
- Coal and Its By-products
- Cyclone Separators and Fluid Dynamics
- Fuel Cells and Related Materials
- Particle Dynamics in Fluid Flows
- Chemical and Physical Properties of Materials
- Advanced Fiber Laser Technologies
- Supercapacitor Materials and Fabrication
Aalto University
2016-2025
The University of Tokyo
2025
Canatu (Finland)
2010-2021
Espoo Music Institute
2015-2020
Google (United States)
2018
Laboratoire d'Étude des Microstructures
2018
Office National d'Études et de Recherches Aérospatiales
2018
Tokyo University of Agriculture and Technology
2015
VTT Technical Research Centre of Finland
2004-2013
Chinese Academy of Sciences
2013
Recent progress in chemical vapour deposition and aerosol synthesis of single-walled carbon nanotubes (SWCNTs) is reviewed with an emphasis on the role metal nanoparticles processes. The effect various parameters SWCNT formation reported basis published experiments. Evolution catalyst particle size distribution due to collision, sintering evaporation during discussed. active has been demonstrated be a reduced form by comparison experimental data calculations regarding equilibrium...
Advances in the synthesis and scalable manufacturing of single-walled carbon nanotubes (SWCNTs) remain critical to realizing many important commercial applications. Here we review recent breakthroughs SWCNTs highlight key ongoing research areas challenges. A few applications that capitalize on properties are also reviewed with respect ways which science can enable advances these While primary focus this is framework SWCNT growth, draw connections mechanisms underlying other 1D 2D materials...
We demonstrate an aerosol CVD process to dry deposit large-area SWCNT networks with tunable conductivity and optical transmittance on a wide range of substrates including flexible polymers. These can be chemically doped reach sheet resistance as low 110 Ω/⟨ at 90% transmittance. A application potential these is demonstrated by fabricating network-based devices such transparent capacitive touch sensors, thin-film transistors (TFTs), bright organic light-emitting diodes (OLEDs).
We report a simple and rapid method to prepare multifunctional free-standing single-walled carbon nanotube (SWCNT) films with variable thicknesses ranging from submonolayer few micrometers having outstanding properties for broad range of exceptionally performing devices. have fabricated state-of-the-art key components the same single component SWCNT material several high-impact application areas: high efficiency nanoparticle filters figure merit 147 Pa(-1), transparent conductive electrodes...
The development of effective and inexpensive hydrogen evolution reaction (HER) electrocatalysts for future renewable energy systems is highly desired. Platinum-based materials are the most active catalyzing HER, but reducing use Pt required because high price scarcity Pt. Here, we achieve pseudo-atomic-scale dispersion Pt, i.e. individual atoms or subnanometer clusters, on sidewalls single-walled carbon nanotubes (SWNTs) with a simple readily upscalable electroplating deposition method....
Efficient hydrogen evolution reaction (HER) through effective and inexpensive electrocatalysts is a valuable approach for clean renewable energy systems. Here, single-shell carbon-encapsulated iron nanoparticles (SCEINs) decorated on single-walled carbon nanotubes (SWNTs) are introduced as novel highly active durable non-noble-metal catalyst the HER. This exhibits catalytic properties superior to previously studied nonprecious materials comparable those of platinum. The SCEIN/SWNT...
Mechanically excellent native cellulose nanofibers that are cleaved from plant cell walls have been modified by functionalized few-walled carbon nanotubes for hybrid nanofiber/nanotube aerogels. They show elastic mechanical behavior in combination with reversible electrical response under compression allowing responsive conductivity and pressure sensing. The concept combines wide availability of nanocellulosics functionality synergistically.
Mixed ion perovskite solar cells (PSC) are manufactured with a metal‐free hole contact based on press‐transferred single‐walled carbon nanotube (SWCNT) film infiltrated 2,2,7,‐7‐tetrakis(N,N‐di‐p‐methoxyphenylamine)‐9,90‐spirobifluorene (Spiro‐OMeTAD). By means of maximum power point tracking, their stabilities compared those standard PSCs employing spin‐coated Spiro‐OMeTAD and thermally evaporated Au back contact, under full 1 sun illumination, at 60 °C, in N 2 atmosphere. During the 140 h...
Single-wall carbon nanotubes (SWCNTs) are ideal for fabricating transparent conductive films because of their small diameter, good optical and electrical properties, excellent flexibility. However, a high intertube Schottky junction resistance, together with the existence aggregated bundles SWCNTs, leads to degraded optoelectronic performance films. We report network isolated SWCNTs prepared by an injection floating catalyst chemical vapor deposition method, in which crossed welded graphitic...
Hybrid hole-transporting material and selective contact for perovskite solar cells was manufactured by industrially viable materials methods.
An aerosol flow reactor was used for the first time high-throughput, high yield synthesis of spherical lignin particles with given inherent hydrophilicity, depending on precursor biomolecule. In situ fractionation via Berner type impactor afforded populations characteristic sizes ranging from ∼30 nm to 2 μm. The as-produced, dry displayed excellent mechanical integrity, even after redispersion under shear in either mineral oil or water. They were effective stabilization oil-in-water (O/W)...
In this work, we fabricated indium-free perovskite solar cells (SCs) using direct- and dry-transferred aerosol single-walled carbon nanotubes (SWNTs). We investigated diverse methodologies to solve SWNTs' hydrophobicity doping issues in SC devices. These include changing wettability of poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PSS), MoO3 thermal doping, HNO3(aq) with various dilutions from 15 70 v/v% minimize its instability toxic nature. discovered that isopropanol (IPA)...
The application potential of cellulose nanofibril (CNF) aerogels has been hindered by the slow and costly freeze‐ or supercritical drying methods. Here, CNF aerogel membranes with attractive mechanical, optical, gas transport properties are prepared in ambient conditions a facile scalable process. Aqueous dispersions vacuum‐filtered solvent exchanged to 2‐propanol further octane, followed drying. resulting characterized high transparency (>90% transmittance), stiffness (6 GPa Young's...
This work focuses on the synthesis method of Au nanoparticles protected by a well-defined polymer monolayer. Nanosized, spherical gold clusters coated with poly(N-isopropylacrylamide) (PNIPA) grafts were prepared controlled radical polymerization. The polymerization N-isopropylacrylamide was initiated from surface nanoparticle modified 4-cyanopentanoic acid dithiobenzoate for reversible-addition-fragmentation chain-transfer number mean diameter core 3.2 nm as observed high-resolution...
Abstract Particle collection characteristics of the compressible flow stages 1–6 Berner low-pressure impactor (BLPI, Hauke Aeras 25-4/0.015) have been studied. A new, real-time stage efficiency measurement system has developed. It is based on use two electrometers, one connected to plate impactor, and other backup filter. This method used with singly charged, monodisperse dioctyl phthalate (DOP) particles determine shape curves BLPI. In addition, particle studied using fluorometric analysis....
Mode-locked sub-picosecond operation of Yb-, Er- and Tm:Hodoped fiber lasers operating at 1.05 microm, 1.56 microm 1.99 respectively, is demonstrated using the same sample carbon nanotube-based saturable absorber mirror. A mesh single-walled nanotubes was deposited on an Ag-mirror a one-step dry-transfer contact press method to combine broadband absorption high reflectance properties. The novel fabrication polymer-free device parameters determined nonlinear reflectivity measurement are...
We propose a simple method for the efficient and rapid synthesis of one-dimensional hematite (α-Fe2O3) nanostructures based on electrical resistive heating iron wire under ambient conditions. Typically, 1–5 μm long α-Fe2O3 nanowires were synthesized time scale seconds at temperatures around 700 ° ⊂. The morphology, structure, mechanism formation studied by scanning transmission electron microscopies, energy dispersive X-ray spectroscopy, photoelectron Raman techniques. A nanowire growth...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCoal combustion aerosols: a field studyEsko I. Kauppinen and Tuomo A. PakkanenCite this: Environ. Sci. Technol. 1990, 24, 12, 1811–1818Publication Date (Print):December 1, 1990Publication History Published online1 May 2002Published inissue 1 December 1990https://pubs.acs.org/doi/10.1021/es00082a004https://doi.org/10.1021/es00082a004research-articleACS PublicationsRequest reuse permissionsArticle Views653Altmetric-Citations152LEARN ABOUT THESE...
Controlling chirality in growth of single-walled carbon nanotubes (SWNTs) is important for exploiting their practical applications. For long it has been conceptually conceived that the structural control SWNTs potentially achievable by fabricating nanoparticle catalysts with proper structures on crystalline substrates via epitaxial techniques. Here, we have accomplished formation monometallic Co nanoparticles well-defined crystal structure and its use as a catalyst selective SWNTs. Dynamics...
A novel material, graphene nanoribbons encapsulated in single-walled carbon nanotubes (GNR@SWNT), was synthesized using confined polymerization and fusion of polycyclic aromatic hydrocarbon (PAH) molecules. Formation the GNR is possible due to confinement effects provided by one-dimensional space inside nanotubes, which helps align coronene or perylene molecules edge achieve dimerization oligomerization into long nanoribbons. Almost 100% filling SWNT with achieved while nanoribbon length...