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Braun, S. (author), Kraska, T. (author), Kalikmanov, V.I. (author)Binary clusters formed by vapor-liquid nucleation are frequently nonhomogeneous objects in which components are not well mixed. The structure of a cluster plays an important role in nucleation and cluster growth. We demonstrate structuring effects by studying high-pressure nucleation and cluster growth in the n-nonane/methane mixture by means of...conference paper 2013
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Binder, T. (author), Hibbe, F. (author), Chmelik, C. (author), Kärger, J. (author), Martinez-Joaristi, A. (author), Gascon, J. (author), Kapteijn, F. (author), Ruthven, D. (author)Nanoporous host materials giving rise to transient guest profiles of cylindrical symmetry during molecular uptake and release are shown to provide particularly advantageous conditions for the study of guest diffusion by micro-imaging. Considering zeolites of structure type DDR (Deca-dodecasil 3R) as a host system and short-chain length...journal article 2012
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Ren, Y. (author), Hayton, D.J. (author), Hovenier, J.N. (author), Cui, M. (author), Gao, J.R. (author), Klapwijk, T.M. (author), Shi, S.C. (author), Kao, T.Y. (author), Hu, Q. (author), Reno, J.L. (author)We demonstrate an experimental scheme to simultaneously stabilize the frequency and amplitude of a 3.5 THz third-order distributed feedback quantum cascade laser as a local oscillator. The frequency stabilization has been realized using a methanol absorption line, a power detector, and a proportional-integral-derivative (PID) loop. The amplitude...journal article 2012
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Harry, K.J. (author), Strobel, S.. (author), Yang, J.K.W. (author), Duan, H. (author), Berggren, K.K. (author)In order to better characterize the development of the electron-beam resist hydrogen silsesquioxane (HSQ), the authors used a quartz crystal microbalance (QCM) to study its rate of dissolution in situ. The authors determined the effect of both salt concentration and applied electric potential on the development rate of HSQ. The development rates...journal article 2011
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Ren, Y. (author), Hovenier, J.N. (author), Higgins, R. (author), Gao, J.R. (author), Klapwijk, T.M. (author), Shi, S.C. (author), Bell, A. (author), Klein, B. (author), Williams, B.S. (author), Kumar, S. (author), Hu, Q. (author), Reno, J.L. (author)A terahertz (THz) heterodyne spectrometer is demonstrated based on a quantum cascade laser (QCL) as a local oscillator (LO) and an NbN hot electron bolometer as a mixer, and it is used to measure high-resolution molecular spectral lines of methanol (CH3OH) between 2.913–2.918 THz. The spectral lines are taken from a gas cell containing methanol...journal article 2010
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Wnuk, J.D. (author), Gorham, J.M. (author), Rosenberg, S.G. (author), Madey, T.E. (author), Hagen, C.W. (author), Fairbrother, D.H. (author)Focused electron beam induced processing (FEBIP) of volatile organometallic precursors has become an effective and versatile method of fabricating metal-containing nanostructures. However, the electron stimulated decomposition process responsible for the growth of these nanostructures traps much of the organic content from the precursor’s ligand...journal article 2010
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Chen, P. (author), Salemink, H.W.M. (author), Alkemade, P.F.A. (author)The authors report the results of investigating two models for ion-beam-induced deposition (IBID). These models describe IBID in terms of the impact of secondary electrons and of sputtered atoms, respectively. The yields of deposition, sputtering, and secondary electron emission, as well as the energy spectra of the secondary electrons were...journal article 2009
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Gross, J. (author)A Helmholtz energy functional for inhomogeneous fluid phases based on the perturbed-chain polar statistical associating fluid theory (PCP-SAFT) equation of state is proposed. The model is supplemented with a capillary wave contribution to the surface tension to account for long-wavelength fluctuations of a vapor-liquid interface. The functional...journal article 2009
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Sidorkin, V. (author), Van Veldhoven, E. (author), Van der Drift, E.W.J.M. (author), Alkemade, P.F.A. (author), Salemink, H. (author), Maas, D. (author)Scanning helium ion beam lithography is presented as a promising pattern definition technique for dense sub-10-nm structures. The powerful performance in terms of high resolution, high sensitivity, and a low proximity effect is demonstrated in a hydrogen silsesquioxane resist.journal article 2009
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Sidorkin, V. (author), Van der Drift, E.W.J.M. (author), Salemink, H. (author)Performance of hydrogen silsesquioxane (HSQ) resist material with respect to the temperature during electron beam exposure was investigated. Electron beam exposure at elevated temperatures up to 90?°C shows sensitivity rise and slight contrast (?) degradation compared to lower temperature cases. Ultrahigh resolution structures formed at elevated...journal article 2008
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Colonna, P. (author), Guardone, A. (author), Nannan, N.R. (author)This paper presents a new class of Bethe-Zel’dovich-Thompson fluids, which are expected to exhibit nonclassical gasdynamic behavior in the single-phase vapor region. These are the linear and cyclic siloxanes, light silicon oils currently employed as working fluids in organic Rankine cycle turbines. State-of-the-art multiparameter equations of...journal article 2007
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Deachapunya, S. (author), Stefanov, A. (author), Berninger, M. (author), Ulbricht, H. (author), Reiger, E. (author), Doltsinis, N.L. (author), Arndt, M. (author)The authors present new measurements of thermal and electrical properties for two porphyrin derivatives. They determine their sublimation enthalpy from the temperature dependence of the effusive beam intensity. The authors study H2TPP and Fe(TPP)Cl in matter-wave interferometry. Both molecules have nearly equal de Broglie wavelengths but...journal article 2007
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Bruining, J. (author), Marchesin, D. (author)This paper deals with the application of steam to enhance the recovery from petroleum reservoirs. We formulate a mathematical and numerical model that simulates coinjection of volatile oil with steam into a porous rock in a one-dimensional setting. We utilize the mathematical theory of conservation laws to validate the numerical simulations....journal article 2007
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Castelijns, H.J. (author), Huinink, H.P. (author), Pel, L. (author), Zitha, P.L.J. (author)The coupled mass transfer and chemical reactions of a gel-forming compound in a two-phase system were studied in detail. Tetra-methyl-ortho-silicate (TMOS) is often used as a precursor in sol-gel chemistry to produce silica gels in aqueous systems. TMOS can also be mixed with many hydrocarbons without chemical reaction, which allows for various...journal article 2006
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Fontaine-Vive, F. (author), Johnson, M.R. (author), Kearley, G.J. (author), Cowan, J.A. (author), Howard, J.A.K. (author), Parker, S.F. (author)Recent work on understanding why protons migrate with increasing temperature in short, strong hydrogen bonds is extended here to three more organic, crystalline systems. Inelastic neutron scattering and density functional theory based simulations are used to investigate structure, vibrations, and dynamics of these systems as functions of...journal article 2006
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Kearley, G.J. (author), Johnson, M.R. (author), Tomkinson, J. (author)The lattice dynamics and molecular vibrations of benzene and deuterated benzene crystals are calculated from force constants derived from density-functional theory (DFT) calculations and compared with measured inelastic neutron-scattering spectra. A very small change (0.5%) in lattice parameter is required to obtain real lattice-mode frequencies...journal article 2006
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Senthilkumar, K. (author), Grozema, F.C. (author), Bickelhaupt, F.M. (author), Siebbeles, L.D.A. (author)Values of charge transfer integrals, spatial overlap integrals and site energies involved in transport of positive charges along columnar stacked triphenylene derivatives are provided. These parameters were calculated directly as the matrix elements of the Kohn–Sham Hamiltonian, defined in terms of the molecular orbitals on individual...journal article 2003
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Burns, G.R. (author), Favier, F. (author), Jones, D.J. (author), Rozière, J. (author), Kearley, G.J. (author)Tetrathiafulvalene (TTF) is a key molecule in the family of charge-transfer salts of interest for their novel transport properties. The correspondence between transport property and electron-molecular vibration coupling requires that we understand the phonon density of states for these materials. Here we report the results of a low temperature...journal article 2003
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Grozema, F.C. (author), Candeias, L.P. (author), Swart, M. (author), Van Duijnen, P.T. (author), Wildeman, J. (author), Hadziioanou, G. (author), Siebbeles, L.D.A. (author), Warman, J.M. (author)In this paper a combined experimental and quantum chemical study of the geometry and opto-electronic properties of unsubstituted and dialkoxy-sustituted phenylene–vinylene oligomers (PV’s) is presented. The optical absorption spectra for PV cations with different chain lengths and substitution patterns were measured using pulse radiolysis with...journal article 2002
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- Dekker, C. (author), Tans, S.J. (author), Oberndorff, B. (author), Meyer, R. (author), Venema, L.C. (author) journal article 1997
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