Chair of Physics (460)
Organisational unit: Chair
Research output
- 2007
- Published
Selbstorganisation bei Wachstum und Ionenbeschuss von Halbleiteroberflächen und deren Ausnutzung zur Herstellung magnetischer Nanostrukturen
Hofer, C. R., 2007Research output: Thesis › Doctoral Thesis
- Published
Self-Organized Hexagonal Patterns of Independent Magnetic Nanodots
Bobek, T., Mikuszeit, N., Camarero, J., Kyrsta, S., Yang, L., Nino, M. A., Hofer, C., Gridneva, L., Arvanitis, D., Miranda, R., de Miguel, J. J., Teichert, C. & Kurz, H., 2007, In: Advanced materials. 19, p. 4375-4380Research output: Contribution to journal › Article › Research › peer-review
- Published
Surface Morphology of Solid-supported Phospholipid Membranes on Self-organized, Nanostructured Semiconductor Substrates
Trummer, G., 2007Research output: Thesis › Diploma Thesis
- Published
Tailoring of Ultra Thin Hexaphenyl (6P) Films on Mica (001) through Surface Modifications
Frank, P., Hlawacek, G., Teichert, C. & Winkler, A., 2007.Research output: Contribution to conference › Poster › Research › peer-review
- Published
The importance of a wetting layer for the initial film growth of p-Hexaphenyl on various substrates
Frank, P., Müllegger, S., Hlawacek, G., Teichert, C., Hernandez-Sosa, G., Sitter, H. & Winkler, A., 2007.Research output: Contribution to conference › Poster › Research › peer-review
- Published
The influence of substrate temperature on the structure and morphology of sexiphenyl thin films on Au(111)
Müllegger, S., Hlawacek, G., Haber, T., Frank, P., Teichert, C., Resel, R. & Winkler, A., 2007, In: Applied physics / A (Series A, Materials science & processing). 87, p. 103-111Research output: Contribution to journal › Article › Research › peer-review
- Published
Topography and conductivity measurements on nanostructures using atomic-force microscopy
Hou, Y., 2007Research output: Thesis › Diploma Thesis
- Published
Using organic Thin Film Transistors with thin reactive layers for Ammonia Detection
Pacher, P., Lex, A., Proschek, V., Werzer, O., Frank, P., Temmel, S., Tchernychova, E., Sezen, M., Hlawacek, G., Shen, Q., Teichert, C., Grogger, W., Resel, R., Schennach, R., Winkler, A., Slugovc, C., Trimmel, G. & Zojer, E., 2007.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Wide band gaps and low-loss wave guiding in ceramic high-dielectric-contrast photonic crystals
Meisels, R., Oberhumer, P., Kuchar, F., Aldrian, F. & Gajic, R., 2007, In: Journal of applied physics. 102, p. 094106-1-094106-4Research output: Contribution to journal › Article › Research › peer-review
- Published
Zeno effect and step edge barrier in organic thin films
Hlawacek, G., Frank, P., Winkler, A. & Teichert, C., 2007.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Zeno effect and step edge barrier in organic thin films
Hlawacek, G., Frank, P., Winkler, A. & Teichert, C., 2007.Research output: Contribution to conference › Poster › Research › peer-review
- 2006
- Published
28th International Conference on the Physics of Semiconductors ICPS
Kuchar, F. (Co-editor), 2006, Eigenverlag.Research output: Book/Report › Anthology › Research
- Published
AFM measurements on cross-sectional samples of isoprene treated fibers without OsO4 treatment
Schmied, F. J. & Teichert, C., 2006Research output: Book/Report › Commissioned report › Transfer › peer-review
- Published
All-angle left-handed negative refraction in Kagomé and honeycomb lattice photonic crystals
Gajic, R., Meisels, R., Kuchar, F. & Hingerl, K., 2006, In: Physical review : B, Condensed matter and materials physics. 73, p. 165310-1-165310-5Research output: Contribution to journal › Article › Research › peer-review
- Published
A New Criterion for Focussing in Photonic Crystals
Meisels, R., Kuchar, F. & Gajic, R., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
B-MCL 2006-65
Danzer, R., Supancic, P., Grünbichler, H., Bermejo Moratinos, R., Kreith, J. & Binder, R., 2006Research output: Book/Report › Commissioned report › Transfer › peer-review
- Published
Characterisation of fibrillar and pore structure in natural and man-made cellulose fibres by modern imaging techniques
Teichert, C., 2006, Proceedings Int. Conf. on Polymer Fibres 2006, Manchester, July 12-14 2006, 4 pages. p. 1-4Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
- Published
Characterization of 6H-SiC surfaces after ion implantation and annealing using positron annihilation spectroscopy and atomic force microscopy
Brauer, G., Anwand, W., Skorupa, W., Brandstetter, S. & Teichert, C., 2006, In: Journal of applied physics. 99, p. 023523-1-023523-8Research output: Contribution to journal › Article › Research › peer-review
- Published
Characterization of a SiC/SiC composite by X-ray diffraction, atomic force microscopy and positron spectroscopies
Brauer, G., Anwand, W., Eichhorn, E., Skorupa, W., Hofer, C., Teichert, C., Kuriplach, J., Cizek, J., Prochazka, I., Coleman, P. G., Nozawa, T. & Kohyama, A., 2006, In: Applied surface science. 252, p. 3342-3351Research output: Contribution to journal › Article › Research › peer-review
- Published
Characterization of cellulose fiber surfaces and cross-sections using atomic force microscopy
Hosemann, P., Schmied, F., Teichert, C. & Schuster, K. C., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Characterization of piezo ceramics on the nano scale by Conducting AFM
Hou, Y., Andreev, A. & Teichert, C., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Characterization of piezo ceramics on the nano scale by Conducting AFM
Hou, Y., Andreev, A. & Teichert, C., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Characterization of semi-conducting nanorods by AFM
Hou, Y., Andreev, A. & Teichert, C., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Characterization of semiconducting nanorods by AFM and conducting AFM
Andreev, A., Hou, Y. & Teichert, C., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Circuit type simulation of magento transport in the quantum Hall effect regime
Oswald, J. & Oswald, M., 2006, In: Journal of physics (Condensed matter). 18, p. R101-R138Research output: Contribution to journal › Article › Research › peer-review
- Published
Circuit type simulations of magneto transport in the quantum Hall effect regime
Oswald, J., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Circuit type simulations of magneto-transport in the quantum Hall effect regime
Oswald, J., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Classical and Quantum Mechanical Simulations in Open Quantum Dot Arrays
Brunner, R., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Coherent random lasing in the deep blue from self-assembled organic nanofibers
Andreev, A., Quochi, F., Cordella, F., Mura, A., Bongiovanni, G., Sitter, H., Hlawacek, G., Teichert, C. & Sariciftci, N. S., 2006, In: Journal of applied physics. 99, p. 034305-1-034305-6Research output: Contribution to journal › Article › Research › peer-review
- Published
Controlling molecular orientation of sexiphenyl thin films
Hlawacek, G., Andreev, A. & Teichert, C., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Controlling molecular orientation of sexiphenyl thin films
Hlawacek, G., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Controlling molecular orientation of sexiphenyl thin films
Hlawacek, G., Andreev, A. & Teichert, C., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Controlling molecular orientation of sexiphenyl thin films
Hlawacek, G., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Counterdiabatic suppression of background state population in resonance leaking by controlling intermediate branching
Uiberacker, C., Jakubetz, W. & Etinski, M., 2006, In: Journal of chemical physics (The journal of chemical physics). 124, p. 124110-1-124110-7Research output: Contribution to journal › Article › Research › peer-review
- Published
Current filament model of the microwave induced zero-resistance state
Oswald, J., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Detailed Investigation with conductive AFM on a cross sectional PZT sample
Hou, Y., Andreev, A. & Teichert, C., 2006Research output: Book/Report › Commissioned report › Transfer › peer-review
- Published
Diffusion versus sticking anisotropy: anisotropic growth of organic molecular films
Berkebile, S., Koller, G., Hlawacek, G., Teichert, C., Netzer, F. P. & Ramsey, M. G., 2006, In: Surface Science. 600, p. L313-L317Research output: Contribution to journal › Article › Research › peer-review
- Published
Dynamical Tunneling in Open Quantum Dot Arrays
Brunner, R., Meisels, R., Kuchar, F., Akis, R., Ferry, D. K. & Bird, J. P., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Effect of Material Structure and Additives on the Optical Properties of PP Cast Films
Wallner, G., Resch, K., Teichert, C., Gahleitner, M. & Binder, W., 2006, In: Monatshefte für Chemie = Chemical monthly. 137, p. 887-897Research output: Contribution to journal › Article › Research › peer-review
- Published
Electrical transport properties of hot wall epitaxially grown para-sexiphenyl nano-needles
Singh, T. B., Hernandez-Sosa, G., Neugebauer, H., Andreev, A., Sitter, H. & Sariciftci, N. S., 2006, In: Physica status solidi / B. 243, p. 3329-3332Research output: Contribution to journal › Article › Research › peer-review
- Published
Final Report Acciones Integradas 2004-2005 Projekt Nr. 17/2004 "Preparation and characterisation of ordered arrays of metallic nanoparticles on ion-eroded semiconductor surfaces"
Teichert, C., 2006Research output: Book/Report › Commissioned report › Transfer › peer-review
- Published
High Permittivity Photonic Crystals Investigated in the Microwave Range by Experiment and Simulation
Oberhumer, P. M., 2006, 70 p.Research output: Thesis › Diploma Thesis
- Published
Influence of film growth conditions on carrier mobility of hot wall epitaxially grown fullerene based transistors
Montaigne Ramil, A., Singh, T. B., Haber, N. T., Marjanovic, N. S., Grünes, S., Andreev, A., Matt, G. J., Resel, R., Sitter, H. & Sariciftci, S., 2006, In: Journal of crystal growth. 288, p. 123-127Research output: Contribution to journal › Article › Research › peer-review
- Published
INFLUENCE OF GROWTH METHODE ON MORPHOLOGY AND STRUCTURE OF SEXIPHENYL THIN FILMS
Hlawacek, G., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
International Workshop on Nanomagnets by Self-organization
Teichert, C. (Co-editor), 2006, Eigenverlag.Research output: Book/Report › Anthology › Research
- Published
Investigation with conductive AFM of a cross sectional PZT reference sample
Hou, Y., Andreev, A. & Teichert, C., 2006Research output: Book/Report › Commissioned report › Transfer › peer-review
- Published
Magnetotransport in a doubly connected two-dimensional quantum Hall system in the low magnetic field regime
Oswald, J. & Oswald, M., 2006, In: Physical review : B, Condensed matter and materials physics. 74, p. 153315-1-153315-4Research output: Contribution to journal › Article › Research › peer-review
- Published
Measurements of I-V-characteristics on a cross-sectional PZT sample with conductive AFM
Hou, Y., Andreev, A. & Teichert, C., 2006Research output: Book/Report › Commissioned report › Transfer › peer-review
- Published
Microwave Studies of Photonic Crystals
Kuchar, F., Meisels, R., Oberhumer, P. & Gajic, R., 2006, In: Advanced engineering materials. 8, p. 1156-1161Research output: Contribution to journal › Article › Research › peer-review
- Published
Mikrowellen-Untersuchungen von Halbleiter-Quanten-Punkten
Kuchar, F. & Meisels, R., 2006Research output: Book/Report › Commissioned report › Transfer › peer-review
- Published
MNA Networking project (BMWA)
Kuchar, F., 2006Research output: Book/Report › Commissioned report › Transfer › peer-review
- Published
Model reaction studies on vanadium oxide nanostructures on Pd(111)
Kratzer, M., Surnev, S., Netzer, F. P. & Winkler, A., 2006, In: Journal of Chemical Physics. 125, 7, 074703.Research output: Contribution to journal › Article › Research › peer-review
- Published
Morphologic characterization of organosilane self-assembled monolayers on SiO2
Shen, Q., Hlawacek, G., Teichert, C., Lex, A., Slugovc, C., Trimmel, G., Pacher, P., Proschek, V. & Zojer, E., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Morphology of sexiphenyl films on anisotropic substrates
Hlawacek, G., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
NAMSOS Project (EC-STRP NMP 505854-1)
Hofer, C. & Teichert, C., 2006Research output: Book/Report › Commissioned report › Transfer › peer-review
- Published
NAMSOS Project (EC-STRP NMP 505854-1), Final Report 2006
Hofer, C. & Teichert, C., 2006Research output: Book/Report › Commissioned report › Transfer › peer-review
- Published
Nanomagnet Arrays Fabricated by Shadow Deposition on Self-organized Semiconductor Templates
Hofer, C. & Teichert, C., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Nanomagnet arrays fabricated on self-organized semiconductor templates
Teichert, C. & Hofer, C., 2006, Nanomagnet arrays fabricated on self-organized semiconductor templates. AIP, American Inst. of Physics, p. 278-278Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
- Published
Nanomagnet arrays fabricated on self-organized semiconductor templates
Hofer, C. & Teichert, C., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Nanomagnet arrays fabricated on self-organized semiconductor templates
Hofer, C., Teichert, C. & Abermann, S., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Nanomagnet arrays fabricated on self-organized semiconductor templates
Teichert, C. & Hofer, C., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Nano-scale characterization of high-k dielectric materials by conducting atomic force microscopy
Kremmer, S., Wurmbauer, H., Andreev, A., Teichert, C., Tallarida, G., Spiga, S., Wiemer, C. & Fanciulli, M., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Nanostructure formation on ion eroded SiGe and Si surfaces
Teichert, C., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Nanostructure formation on ion eroded SiGe and Si surfaces
Hofer, C. & Teichert, C., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Nanostructure formation on ion eroded SiGe and Si surfaces
Hofer, C. & Teichert, C., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Negative refraction and flat-lens focusing in a 2D square-lattice photonic crystal at microwave and millimeter wave frequencies
Meisels, R., Gajic, R., Kuchar, F. & Hingerl, K., 2006, In: Optics express. 14, p. 6766-6777Research output: Contribution to journal › Article › Research › peer-review
- Published
Network based simulation of non-equilibrium currents in the
Oswald, J., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Oligophenyl thin films for Organic Field Effect Transistors
Andreev, A., Hlawacek, G., Sitter, H., Winkler, A., Ramsey, M., Resel, R., Teichert, C. & Sariciftci, N. S., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Optical Properties of Highly Transparent Polypropylene Cast Films: Influence of Material Structure, Additives and Processing Conditions
Resch, K., Wallner, G., Teichert, C., Maier, G. & Gahleitner, M., 2006, In: Polymer engineering and science. p. 520-531Research output: Contribution to journal › Article › Research › peer-review
- Published
Para-Sexiphenyl Thin Films Grown by Hot Wall Epitaxy on KCI(001)substrates
Andreev, A., Montaigne, A., Hlawacek, G., Sitter, H. & Teichert, C., 2006, In: Journal of vacuum science & technology / A (JVST). 24, p. 1660-1663Research output: Contribution to journal › Article › Research › peer-review
- Published
Para-sexiphenyl thin films grown on dielectric substrates
Andreev, A., Hou, Y., Hlawacek, G. & Teichert, C., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Para-sexiphenyl thin films grown on dielectric substrates
Andreev, A., Montaigne, A., Hlawacek, G., Hou, Y., Haber, T., Resel, R., Teichert, C., Sitter, H. & Sariciftci, N. S., 2006, Para-sexiphenyl thin films grown on dielectric substrates. AIP, American Inst. of Physics, p. 328-328Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
- Published
Positional Disorder in the Regime of Negative Refraction in Photonic Crystals
Meisels, R., Kuchar, F. & Gajic, R., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Quantum Chaology in Open Quantum Dot Arrays
Brunner, R., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Quantum-Dot Arrays: a Periodic KAM-island System for the Study of Dynamical Tunneling and Enviromental Dephasing
Brunner, R., Kuchar, F., Bird, J., Elhassan, M., Ferry, D. K., Ochiai, Y., Ishibashi, K. & Akis, R., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Reactive Gate Oxide Modification for Organic Thin Film Transistors
Pacher, P., Lex, A., Proschek, V., Hlawacek, G., Shen, Q., Teichert, C., Satka, A., Kovac, J., Werzer, O., Temmel, S., Frank, P., Resel, R., Schennach, R., Winkler, A., Slugovc, C., Trimmel, G. & Zojer, E., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Self-organization of Nanostructures in Inorganic and Organic Semiconductor Systems
Teichert, C., Hofer, C. & Hlawacek, G., 2006, In: Advanced engineering materials. 8, p. 1057-1065Research output: Contribution to journal › Article › Research › peer-review
- Published
Shadow deposition on self-organized semiconductor templates to fabricate arrays
Teichert, C., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Si and SiGe Surfaces: Nanostructure Formation During Growth and Ion-Bombardment
Hofer, C., Abermann, S. & Teichert, C., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Single crystalline nature of para-sexiphenyl crystallites grown on KCl(100)
Haber, T., Oehzelt, M., Resel, R., Andreev, A., Thierry, A., Sitter, H., Smilgies, D.-M., Schaffer, W. & Grogger, W., 2006, In: Journal of nanoscience and nanotechnology. 6, p. 698-703Research output: Contribution to journal › Article › Research › peer-review
- Published
Spin Resonance in High Mobility Heterostructures
Meisels, R., Ziouzia, F., Kuchar, F. & Deutschmann, R., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Spontaneous rearrangement of para-sexiphenyl crystallites into nano-fibers
Teichert, C., Hlawacek, G., Andreev, A., Sitter, H., Frank, P., Winkler, A. & Sariciftci, N. S., 2006, In: Applied physics / A (Series A, Materials science & processing). 82, p. 665-669Research output: Contribution to journal › Article › Research › peer-review
- Published
Structure and Mechanical Properties of Carbon- and Silica-based Nanomaterials
Zickler, G., 2006, 160 p.Research output: Thesis › Doctoral Thesis
- Published
The epitaxial sexiphenyl (001) monolayer on TiO2(110): A grazing incidence X-ray diffraction study
Resel, R., Hlawacek, G. & Teichert, C., 2006, In: Surface Science. 600, p. 4645-4649Research output: Contribution to journal › Article › Research › peer-review
- Published
Wave propagation in photonic crystals with positional disorder
Meisels, R. & Kuchar, F., 2006.Research output: Contribution to conference › Poster › Research › peer-review
- 2005
- Published
Reaction and desorption kinetics of H2 and H2O on activated and non-activated palladium surfaces
Pauer, G., Kratzer, M. & Winkler, A., 14 Oct 2005, In: Vacuum. 80, 1-3, p. 81-86 6 p.Research output: Contribution to journal › Article › Research › peer-review
- Published
Behavior of SiO2 nanostrures under intense extreme ultraviolet illumination
Teichert, C. & Kremmer, S., 2005, In: Journal of applied physics. 97Research output: Contribution to journal › Article › Research › peer-review
- Published
Bestimmung des Kontaktwinkels und der Oberflächenenergie von beschichteten Stahlproben
Hlawacek, G., Gürkan, N. & Teichert, C., 2005Research output: Book/Report › Commissioned report › Transfer › peer-review
- Published
Characterization of cellulose fiber surfaces using atomic-force microscopy
Teichert, C., 2005.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Characterization of MBE grown HfO2 films on Ge(001)
Teichert, C., 2005.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Circular Polarization Dependent Study of the Microwave Photoconductivity in a Two-Dimensional Electron System
Smet, J., Gorshunov, B., Jiang, C., Pfeiffer, L., West, K., Umansky, V., Meisels, R., Kuchar, F. & von Klitzing, K., 2005, In: Physical review letters. 95, p. 116804-1-116804-4Research output: Contribution to journal › Article › Research › peer-review
- Published
Classical Analysis of Trajectories in an Open Quantum Dot
Brunner, R., Meisels, R. & Kuchar, F., 2005.Research output: Contribution to conference › Poster › Research › peer-review
- Published
Classical and Quantum Mechanical Behaviour in the Low-Field Magneto-Resistance in Open Quantum Dots
Brunner, R., 2005Research output: Thesis › Doctoral Thesis
- Published
Conductive-AFM measurements on cross sectional samples
Andreev, A. & Teichert, C., 2005Research output: Book/Report › Commissioned report › Transfer › peer-review
- Published
Das Institut für Physik, Montanuniversität Leoben
Teichert, C. & Kuchar, F., 2005, Handbuch der Nanoanalytik, Steiermark. p. 253-254Research output: Chapter in Book/Report/Conference proceeding › Chapter › Research
- Published
Effect of Material Structure and Additives on the Optical Properties of PP Cast Films
Resch, K., Wallner, G. & Teichert, C., 2005, 7th Austrian Polymer Meeting. p. 2-2Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
- Published
Electron spin resonance and related phenomena of low-dimensional electronic systems in III-V compounds
Meisels, R., 2005, In: Semiconductor science and technology. 20, p. R1-R18Research output: Contribution to journal › Article › Research › peer-review
- Published
Enhanced mobility of organic field-effect transistors with epitaxially grown C60 film by in-situ heat treatment of the organic dielectric
Andreev, A. & Sitter, H., 2005, Materials Research Society symposium proceedings. Materials Research Society : MRSResearch output: Chapter in Book/Report/Conference proceeding › Conference contribution
- Published
Freestanding, Highly Flexible, Large Area, Nanoporous Alumina Membranes with Complete Through-Hole Pore Morphology
Teichert, C., 2005, In: European journal of inorganic chemistry. 12, p. 2352-2359Research output: Contribution to journal › Article › Research › peer-review
- Published
Imaging of magnetic nanodots on self-organized semiconductor substrates
Teichert, C., Hofer, C. & Kasper, E., 2005, In: Physical review : B, Condensed matter and materials physics. 71Research output: Contribution to journal › Article › Research › peer-review