Publication list for Talos for Materials Science

Title: Gas-assisted electron-beam-induced nanopatterning of high-quality titanium oxide
Authors: A V Riazanova, B N Costanzi, A I Aristov, Y G M Rikers, J J L Mulders, A V Kabashin,E Dan Dahlberg and L M Belova 
References: Nanotechnology ,Volume 27, Number 11
Date: February 2016
Abstract
Title: Gas-assisted electron-beam-induced nanopatterning of high-quality titanium oxide
Authors: A V Riazanova, B N Costanzi, A I Aristov, Y G M Rikers, J J L Mulders, A V Kabashin,E Dan Dahlberg and L M Belova 
References: Nanotechnology ,Volume 27, Number 11
Date: February 2016
Abstract: Electron-beam-induced deposition of titanium oxide nanopatterns is described. The precursor is titanium tetra-isopropoxide, delivered to the deposition point through a needle and mixed with oxygen at the same point via a flow through a separate needle. The depositions are free of residual carbon and have an EDX determined stoichiometry of TiO2.2. High resolution transmission electron microscopy and Raman spectroscopy studies reveal an amorphous structure of the fabricated titanium oxide. Ellipsometric characterization of the deposited material reveals a refractive index of 2.2−2.4 RIU in the spectral range of 500−1700 nm and a very low extinction coefficient (lower than 10−6 in the range of 400−1700 nm), which is consistent with high quality titanium oxide. The electrical resistivity of the titanium oxide patterned with this new process is in the range of 10-40 GΩ cm and the measured breakdown field is in the range of 10-70 V  μ m−1. The fabricated nanopatterns are important for a variety of applications, including field-effect transistors, memory devices, MEMS, waveguide structures, bio- and chemical sensors.
Title: Stability of Y-Ti-O nanoparticles during laser melting of advanced oxide dispersion-strengthened steel powder
Authors: Hye Jung Chang, Hye Young Cho, Jeoung Han Kim
References: Journal of Alloys and Compounds, Volume 653, December 25, 2015, Pages 528-533
Date: December 2015
Abstract
Title: Stability of Y-Ti-O nanoparticles during laser melting of advanced oxide dispersion-strengthened steel powder
Authors: Hye Jung Chang, Hye Young Cho, Jeoung Han Kim
References: Journal of Alloys and Compounds, Volume 653, December 25, 2015, Pages 528-533
Date: December 2015
Abstract: The microstructural stability of Y-Ti-O nanoparticles during spot laser beam melting of oxide dispersion- strengthened steel powder is investigated. After the spot laser beam melting, Y2Ti2O7 oxide nanoparticles are successfully retained without dissolution or transformation. However, their particle size is considerably coarser than typical Y2Ti2O7 nanoparticles due to the active agglomeration of the Y-Ti-O nanoparticles, Cr-carbides, and Ar bubbles. In particular, an unexpectedly large volume of Ar bubbles embedded or attached to the Y2Ti2O7 nanoparticles is observed. The Ar gas bubbles seem to accelerate the particle agglomeration. No other phase is observed than Y2Ti2O7 oxide, Cr-carbide and Ar bubble in the sample.
Title: Catalysis: The complexity of intimacy
Authors: Roger Gläser
References: Nature 528, 197-198. December, 10 2015
Date: December 2015
Abstract
Title: Catalysis: The complexity of intimacy
Authors: Roger Gläser
References: Nature 528, 197-198. December, 10 2015
Date: December 2015
Abstract: Catalysts that contain two types of active site split long hydrocarbon molecules into more-useful shorter ones Research into controlling the nanoscale separation of the sites challenges accepted design rules for such catalysts.
Title: Three-dimensional characterization of Gd nanoparticles using STEM-in-SEM tomography in a dual-beam FIB- SEM
Authors: Brandon Van Leer; Cedric Bouchet-Marquis; Huikai Cheng
References: SPIE 9636, Scanning Microscopies 2015, 963606. October 21, 2015
Date: October 2015
Abstract
Title: Three-dimensional characterization of Gd nanoparticles using STEM-in-SEM tomography in a dual-beam FIB- SEM
Authors: Brandon Van Leer; Cedric Bouchet-Marquis; Huikai Cheng
References: SPIE 9636, Scanning Microscopies 2015, 963606. October 21, 2015
Date: October 2015
Abstract: A thin section sample of gadolinium nanoparticles ranging in size up to 50 nm mounted on an aluminum substrate was prepared using in-situ lift-out (INLO) by FIB. The sample was thinned using 30 kV Ga+ FIB to approximately 125 nm. Using an in-situ stage with 360 degree continuous tilt, the thin section was imaged every 1 degree with 30 keV SEM and the STEM detector through approximately 125 degrees of tilt. The data set was then reconstructed into a 3D rendering using FEI's tomography reconstruction software, Inspect3D Express, and visualized using FEI's Avizo image and data analysis software. The technique and results compared with conventional TEM and STEM tomography using a 200 keV FEI Talos TEM will be discussed.
Title: Enhanced oxidation-resistant Cu-Ni core-shell nanowires: controllable one-pot synthesis and solution processing to transparent flexible heaters
Authors: Chen J, Chen J, Li Y, Zhou W, Feng X, Huang Q, Zheng JG, Liu R, Ma Y, Huang W.
References: Nanoscale. 7(40):16874-9. October 8, 2015.
Date: October 2015
Abstract
Title: Enhanced oxidation-resistant Cu-Ni core-shell nanowires: controllable one-pot synthesis and solution processing to transparent flexible heaters
Authors: Chen J, Chen J, Li Y, Zhou W, Feng X, Huang Q, Zheng JG, Liu R, Ma Y, Huang W.
References: Nanoscale. 7(40):16874-9. October 8, 2015.
Date: October 2015
Abstract: Coating nickel onto copper nanowires (Cu NWs) by one-pot synthesis is an efficient approach to improving the oxidation resistance of the nanowires. Because Ni is much less conductive than Cu, it is of great importance to understand the relationship between the thickness of the Ni coating layer and the properties of NWs. Here we demonstrate one-pot synthesis of Cu-Ni core-shell NWs with a tunable Ni thickness by simply varying the Cu and Ni mole ratio in the precursor.
Title: Direct carbon coating at high temperature on LiNi0.5Mn1.5O4 cathode: Unexpected influence on crystal structure and electrochemical performances
Authors: Wang, Hailong; Shi, Zhongqi; Li, Jiawen; Yang, Shuo; Ren, Ruibo; Cui, Jianyou; Xiao, Jiali; Zhang, Bo
References: Journal of Power Sources, Volume 288, p. 206-213. August 15, 2015
Date: August 2015
Abstract
Title: Direct carbon coating at high temperature on LiNi0.5Mn1.5O4 cathode: Unexpected influence on crystal structure and electrochemical performances
Authors: Wang, Hailong; Shi, Zhongqi; Li, Jiawen; Yang, Shuo; Ren, Ruibo; Cui, Jianyou; Xiao, Jiali; Zhang, Bo
References: Journal of Power Sources, Volume 288, p. 206-213. August 15, 2015
Date: August 2015
Abstract: Carbon coated LiNi0.5Mn1.5O4/C composite has been directly synthesized at 800 °C without using reducing gas or introducing additional low temperature treatments. Scanning/transmission electron microscope (S/TEM) observation shows clear coating layer on the particle's surface, which has been verified by Energy Dispersive X-Ray Spectroscopy (EDX), Raman spectra and Brunauer-Emmett-Teller (BET); and the results indicate the coating layer is amorphous carbon which significantly increases the BET surface area, and the carbon content is around 0.6 wt%.
Title: Design of Base Zeolite Catalysts by Alkali-Metal Grafting in Alcoholic Media
Authors: Tobias C. Keller, Kartikeya Desai, Sharon Mitchell, and Javier Pérez-Ramírez
References: ACS Catal., 2015, 5 (9), pp 5388-5396. August 4, 2015
Date: August 2015
Abstract
Title: Design of Base Zeolite Catalysts by Alkali-Metal Grafting in Alcoholic Media
Authors: Tobias C. Keller, Kartikeya Desai, Sharon Mitchell, and Javier Pérez-Ramírez
References: ACS Catal., 2015, 5 (9), pp 5388-5396. August 4, 2015
Date: August 2015
Abstract: This study investigates the synthesis of base catalysts through the postsynthetic grafting of alkali cations (Li, Na, K, Rb, or Cs) onto USY zeolites in alcoholic solutions of the corresponding metal hydroxides. In contrast to previous studies conducted in aqueous media, the utilization of alcohols (MeOH, EtOH, or iPrOH) offers increased control over the metalation process while simultaneously averting degradation and dissolution of the crystalline framework. The achievement of close to an atomic dispersion of the alkali metals in the zeolite is confirmed by in-depth characterization combining 23Na MAS NMR, microscopy, elemental mapping, and CO2 chemisorption.
Title: Light emission from silicon with tin-containing nanocrystals
Authors: Søren Roesgaard, Jacques Chevallier, Peter I. Gaiduk, John Lundsgaard Hansen, Pia Bomholt Jensen, Arne Nylandsted Larsen, Axel Svane, Peter Balling and Brian Julsgaard
References: AIP Advances 5, 077114, July 8, 2015
Date: July 2015
Abstract
Title: Light emission from silicon with tin-containing nanocrystals
Authors: Søren Roesgaard, Jacques Chevallier, Peter I. Gaiduk, John Lundsgaard Hansen, Pia Bomholt Jensen, Arne Nylandsted Larsen, Axel Svane, Peter Balling and Brian Julsgaard
References: AIP Advances 5, 077114, July 8, 2015
Date: July 2015
Abstract: Tin-containing nanocrystals, embedded in silicon, have been fabricated by growing an epitaxial layer of Si_{1-x-y} Sn_{x}C_{y}, where x = 1.6 % and y = 0.04 %, followed by annealing at various temperatures ranging from 650 to 900 degrees C. The nanocrystal density and average diameters are determined by scanning transmission-electron microscopy to ~ 10^{17} cm^{-3} and ~ 5 nm, respectively. Photoluminescence spectroscopy demonstrates that the light emission is very pronounced for samples annealed at 725 degrees C, and Rutherford back-scattering spectrometry shows that the nanocrystals are predominantly in the diamond-structured phase at this particular annealing temperature. The origin of the light emission is discussed.
Title: Graphene oxide nanoparticle attachment and its toxicity on living lung epithelial cells
Authors: Linnea Ahlinder; Jiří Henych; Susanne Wiklund Lindström; Barbro Ekstrand-Hammarström; Václav Stenglc and Lars Österlund
References: RSC Adv., 2015,5, 59447-59457. July 1, 2015
Date: July 2015
Abstract
Title: Graphene oxide nanoparticle attachment and its toxicity on living lung epithelial cells
Authors: Linnea Ahlinder; Jiří Henych; Susanne Wiklund Lindström; Barbro Ekstrand-Hammarström; Václav Stenglc and Lars Österlund
References: RSC Adv., 2015,5, 59447-59457. July 1, 2015
Date: July 2015
Abstract: Since its discovery, graphene and its oxidized form, graphene oxide (GO), have attracted interest in a wide range of technical applications. Concerns about their potential toxicity calls for scrutinized studies, but hitherto conflicting results have been reported which partly may be due to variations of synthesis and exposure procedures. Here we report on the attachment and toxicity of contamination-free graphene oxide nanoparticles (GONP) in living lung epithelial cells.
Title: A Facile Multi-interface Transformation Approach to Monodisperse Multiple-Shelled Periodic Mesoporous Organosilica Hollow Spheres
Authors: Teng Z, Su X, Zheng Y, Zhang J, Liu Y, Wang S, Wu J, Chen G, Wang J, Zhao D, Lu G
References: J Am Chem Soc. June, 24 2015; 137(24):7935-44
Date: June 2015
Abstract
Title: A Facile Multi-interface Transformation Approach to Monodisperse Multiple-Shelled Periodic Mesoporous Organosilica Hollow Spheres
Authors: Teng Z, Su X, Zheng Y, Zhang J, Liu Y, Wang S, Wu J, Chen G, Wang J, Zhao D, Lu G
References: J Am Chem Soc. June, 24 2015; 137(24):7935-44
Date: June 2015
Abstract: The synthesis of well-defined and complex hollow structures via a simple method is still a major challenge. In this work, a facile and controllable "multi-interface transformation" approach for preparation of monodisperse multi- shelled periodic mesoporous organosilica (PMO) hollow spheres has been established by a one-step hydrothermal treatment of successively grown organosilica particles. In addition, various organic groups (alkyl, aromatic, nd heteroelement fragments) are successfully incorporated into the multi-shelled PMO hollow spheres by successively adding different bridged organosilica precursors.
Title: Liquid phase epitaxy of binary III–V nanocrystals in thin Si layers triggered by ion implantation and flash lamp annealing
Authors: Rene Wutzler, Lars Rebohle, Slawomir Prucnal, Felipe L. Bregolin, Rene Hübner, Matthias Voelskow, Manfred Helm and Wolfgang Skorupa
References: J. Appl. Phys. 117, 175307. May 6, 2015
Date: May 2015
Abstract
Title: Liquid phase epitaxy of binary III–V nanocrystals in thin Si layers triggered by ion implantation and flash lamp annealing
Authors: Rene Wutzler, Lars Rebohle, Slawomir Prucnal, Felipe L. Bregolin, Rene Hübner, Matthias Voelskow, Manfred Helm and Wolfgang Skorupa
References: J. Appl. Phys. 117, 175307. May 6, 2015
Date: May 2015
Abstract: The integration of III-V compound semiconductors in Si is a crucial step towards faster and smaller devices in future technologies. In this work, we investigate the formation process of III-V compound semiconductor nanocrystals, namely, GaAs, GaSb, and InP, by ion implantation and sub-second flash lamp annealing in a SiO2/Si/SiO2 layer stack on Si grown by plasma-enhanced chemical vapor deposition. Raman spectroscopy, Rutherford Backscattering spectrometry, and transmission electron microscopy were performed to identify the structural and optical properties of these structures.
Title: Stabilization of iron by manganese promoters in uniform bimetallic FeMn Fischer–Tropsch model catalysts prepared from colloidal nanoparticles
Authors: M. Dad; H.O.A. Fredriksson; J. Van de Loosdrecht; P.C. Thüne; J.W. Niemantsverdriet
References: Catalysis, Structure & Reactivity, Volume 1, Issue 2 (April 2015), pp. 101-109
Date: April 2015
Abstract
Title: Stabilization of iron by manganese promoters in uniform bimetallic FeMn Fischer–Tropsch model catalysts prepared from colloidal nanoparticles
Authors: M. Dad; H.O.A. Fredriksson; J. Van de Loosdrecht; P.C. Thüne; J.W. Niemantsverdriet
References: Catalysis, Structure & Reactivity, Volume 1, Issue 2 (April 2015), pp. 101-109
Date: April 2015
Abstract: A systematic study was carried out to investigate the response of monodisperse supported Fe and FeMn nanoparticles to treatments in O2, H2 and H2/CO at temperatures between 270 and 400°C. Uniform size (7-14 nm), Fe and mixed FeMn nanoparticles were synthesised by applying thermal decomposition of Fe- and Mn-oleate complexes in a high boiling point solvent. By combining X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and energy-dispersive X-ray (EDX) analysis, the phase composition and morphology of the model catalysts were studied.
Title: Thermal stability and structural evolution of quaternary Ti–Ta–B–N coatings
Authors: M. Mikulaa, T. Rocha, D. Plašienkaa, L. Satrapinskyya, P. Švec sr.c, D. Vlčkováa, M. Dvoranováa, B. Grančiča, M. Gregora, A. Plecenika, P. Kúša
References: Surface and Coatings Technology, Volume 259, Part C, November 25, 2014, Pages 698-706
Date: November 2014
Abstract
Title: Thermal stability and structural evolution of quaternary Ti–Ta–B–N coatings
Authors: M. Mikulaa, T. Rocha, D. Plašienkaa, L. Satrapinskyya, P. Švec sr.c, D. Vlčkováa, M. Dvoranováa, B. Grančiča, M. Gregora, A. Plecenika, P. Kúša
References: Surface and Coatings Technology, Volume 259, Part C, November 25, 2014, Pages 698-706
Date: November 2014
Abstract: Nanostructured hard coatings are becoming fundamental in many application areas due to their highly enhanced mechanical properties compared to conventional materials. Among others, novel quaternary systems are attracting increasing attention since they are expected to further improve endurance of such coatings. In this work, combined experimental and ab initio analysis of thermal stability and structural evolution of quaternary Ti-Ta-B-N coatings with Ta content 0-40 at.% prepared by reactive magnetron co-sputtering is presented. All prepared Ti1-x-yTaxByN coatings in the as-deposited state exhibit amorphous structure, which is supported by ab initio calculations.