X. Liu, F. Gädeke, M. Hohgardt, P.J. Walla, Highly Efficient and Stable Luminescent Solar Concentrator Based on Light-Harvesting and Energy-Funneling Nanodot Pools Feeding Aligned, Light-Redirecting Nanorods. Sol. RRL, (2024), 2400273.
C. Lanz, Y. Krysiak, X. Liu, M. Hohgardt, P. J. Walla, S. Polarz, Non-Classical Self-Assembly of Anisotropic Magneto-Organosilica Janus Particles Possessing Surfactant Properties and the Field-Triggered Breakdown of Surface Activity and Amphiphilic Properties. Small, (2023), 19, 2304380.
X. Liu, F. Li, M. Hohgardt, L. F. Klepzig, M. M. Willich, H.-A. Christ, A. Schaate, P. Behrens, J. Lauth, H. Menzel, P. J. Walla, "Perpendicular Alignment of 2D Nanoplatelet Emitters in Electrospun Fibers: A Result of the Barus Effect?", Macromol. Mater. Eng., 2300027, (2023).
A. Silapetere, S. Hwang, Y. Hontani, R. G. F. Lahore, J. Balke, F. V. Escobar, M. Tros, P. E, Konold, R. Matis, R. Croce, P.J. Walla, P. Heildebrandt, U. Alexiev, J. T. M. Kennis, H. Sun, T. Utesch, P. Hegemann, "QuasAr Odyssey: the origin of fluorescence and its voltage sensitivity in microbial rhodopsins", Nat Commun, 13, 5501, (2022).
J. Nowak, J. Füller, P. J. Walla, "Combined contributions of carotenoids and chlorophylls in two-photon spectra of photosynthetic pigment-protein complexes - A new way to quantify carotenoid dark state to chlorophyll energy transfer?", J. Chem. Phys, 156, 191103, (2022).
M. Hohgardt, F.E. Gädeke. L. Wegener, P. J. Walla, "A Refined Prediction Parameter for Molecular Alignability in Stretched Polymers and a New Light-Harvesting Material for AlGaAs Photovoltaics", Polymers, 14(3), 532, (2022).
T. Grothe, P. J. Walla, " Building and Using a Two-Photon Fluorescence Cross-Correlation Spectroscopy Setup Including Fluorescence Lifetime Analysis", Methods in Molecular Biology, 2417, 147-166, (2022).
T. Grothe, P. J. Walla, "Fluorescence Lifetime and Cross-correlation Spectroscopy for Observing Membrane Fusion of Liposome Models Containing Synaptic Proteins", Methods in Molecular Biology, 2417, 167-180, (2022).
R. Minner-Meinen, J.-N Weber, A. Albrecht, R. Matis, M. Behnecke, C. Tietge, S. Frank, J. Schulze, H. Buschmann, P. Walla, R.-R. Mendel, R. Hänsch, S. Kaufholdt, "Split-HaloTag imaging assay for sophisticated microscopy of protein–protein interactions in planta", Plant Communications, 2(5) 100212, (2021)
D. A. Gacek, A. Betke, J. Nowak, H. Lokstein, P. J. Walla, "Two-Photon absorption and excitation spectroscopy of carotenoids, chlorophylls and pigment-protein complexes", Phys. Chem. Chem. Phys., 23(14), 8731-8738 (2021).
T. Grothe, J. Nowak, R. Jahn, P. J. Walla, "Selected tools to visualize membrane interactions", Eur. Biophys. J., 50(2), 211-222, (2021).
Y. Becker, S. Roth, M. Scheurer, A. Jakob, D. A. Gacek, Peter J. Walla, A. Dreuw, J. Wachtveitl and A. Heckel, "Selective Modification for Red Shifted Excitability – a Small Change in Structure, a Huge Change in the Photochemistry", Chem. Eur. J., 27(6), 2212-2218, (2020).
M. M. Willich, L. Wegener, J. Vornweg, M. Hohgardt, J. Nowak, M. Wolter, C. R. Jacob, P. J. Walla, "A new ultrafast energy funneling material harvests three times more diffusive solar energy for GaInP photovoltaics", PNAS, 117(52), 32929-32938 (2020).
D. Pfennig, A. Albrecht, J. Nowak, P.J. Walla, "A device for exploring the full angular excitation space – Can more angular projections improve determination of a molecules 3D-orientation in the presence of noise?", Chemical Physics, 538, 110853 (2020)
D. A. Gacek, C.-P. Holleboom, P.-N. Liao, M. Negretti, R. Croce, P. J. Walla, "Carotenoid Dark State to Chlorophyll Energy Transfer in Isolated Light-Harvesting Complexes CP24 and CP29", Photosynth. Res., 143(1), 19-30 (2020).
A. Albrecht, D. Pfennig, J. Nowak, M. Grunwald, P. J. Walla, "On the Efficiency limits of Artificial and Ultrafast Light-Funnels", nano select, 1, 525-538 (2020).
D. A. Gacek, C.-P. Holleboom, S. Tietz, H. Kirchhoff, P. J. Walla, "PsbS-Dependent and -Independent Mechanisms Regulate Carotenoid-Chlorophyll Energy Coupling in Grana Thylakoids", FEBS Letter, 593(22), 3190-3197 (2019).
M. Ashfold, S. Bai, S. Bradforth, ... P.J. Walla, J. Woolley, "Photo-protection/photo-damage in natural systems: General discussion", Faraday Discussions., 216, 538-563 (2019).
A. Pieper, M. Hohgardt, M. Willich, D. A. Gacek, N. Hafi, D. Pfennig, A. Albrecht, P. J. Walla, "Biomimetic light-harvesting funnels for re-directioning of diffuse light", Nat. Commun., 9(1), 666 (2018).
U. Diederichsen, B. Hubrich, P. Kumar, H. Neitz, M. Grunwald, T. Grothe, P. J. Walla, R. Jahn, "Novel PNA hybrid sequences as recognition units in SNARE protein mimicking peptides", Angew. Chem. Int. Ed., 57, 14932-14936 (2018).
S. Park, A. L. Fischer, C. J. Steen, M. Iwai, J. M. Morris, P. J. Walla, K. K. Niyogi, G. R. Fleming, "Chlorophyll-Carotenoid Excitation Energy Transfer in High-Light-Exposed Thylakoid Membranes Investigated by Snapshot Transient Absorption Spectroscopy", J. Am. Chem. Soc., 140, 11965–11973 (2018).
H. Yavuz, I. Kattan, J. M. Hernandez, O. Hofnagel, A. Witkowska, S. Raunser, P. J. Walla, R. Jahn, "Arrest of trans-SNARE zippering uncovers loosely and tightly docked intermediates in membrane fusion", J. Biol. Chem., 293, 8645-8655 (2018).
Y. Becker, E. Unger, M. A. H. Fichte, D. A. Gacek,A. Dreuw, J. Wachtveitl, P. J. Walla, A. Heckel, "A red-shifted two-photon-only caging group for three-dimensional photorelease", Chem. Sci., 9, 2797-2802 (2018).
S. Schroeder, J D. Kaufman, M. Grunwald, P. J. Walla, N.-A. Lakomek, P. T. Wingfield, "HIV-1 gp41 transmembrane oligomerization monitored by FRET and FCS", FEBS. Lett., 592, 939-948 (2018).
P.J. Walla, "Photosynthesis: Nature's power switching station", Nat. Chem., 9 (8), 728-730 (2017).
D. A. Gacek, A. L. Moore, T. A. Moore, P. J. Walla, "Two-Photon Spectra of Chlorophylls and Carotenoid–Tetrapyrrole Dyads", J. Phys. Chem. B, 121 (43), 10055-10063 (2017).
I. Schmidt, A. Pieper, H. Wichmann, B. Bunk, K. Huber, J. Overmann, P.J. Walla, U. Schröder, "In Situ Autofluorescence Spectroelectrochemistry for the Study of Microbial Extracellular Electron Transfer", ChemElectroChem, 4, 2515-2519 (2017).
C.-C. Lin, H.-F. Hsu, P.J. Walla, "A One Donor-Two Acceptor Lipid Bilayer FRET Assay Based on Asymmetrically Labeled Liposomes", J. Phys. Chem. B., 120, 11085-11092 (2016).
K. Hiragami-Hamada, S. Soeroes, M. Nikolov, B. Wilkins, S. Kreuz, C.Chen, I. A. De La Rosa-Velázquez, H.M. Zenn, N. Kost, W. Pohl, A.Chernev, D.Schwarzer, T. Jenuwein, M. Lorincz, B. Zimmermann, P. J. Walla, H. Neumann, T. Baubec, H. Urlaub, W. Fischle, "Dynamic and flexible H3K9me3 bridging via HP1β dimerization establishes a plastic state of condensed chromatin", Nat. Commu., 7, 11310 (2016).
Y. Park, J. B. Seo, A. Fraind, A. Pérez-Lara, H. Yavuz, K. Han, S.-R. Jung, I. Kattan, P. J. Walla, M.Y. Choi, D. S. Cafiso, D.-S. Koh & R. Jahn, "Synaptotagmin-1 binds to PIP2-containing membrane but not to SNAREs at physiological ionic strength", Nat. Struct. Mol. Biol., 22, 815-823 (2015).
N. Hafi, M. Grunwald, L.S. van den Heuvel, T. Aspelmeier, C. Steinem, M. Korte, A. Munk, P.J. Walla, Nat. Meth., 13 (1), 8-9 (2015).
J.-H. Chen, Y. Kellner, M. Zagrebelsky, M. Grunwald, M. Korte, P. J. Walla, "Two-Photon Correlation Spectroscopy in Single Dendritic Spines Reveals Fast Actin Filament Reorganization during Activity-Dependent Growth", PLoS ONE, 10(5):e0128241., doi: 10.1371/journal.pone.0128241 (2015).
C.-P. Holleboom, D. A. Gacek, P.-N. Liao, M. Negretti, R. Croce, P. J. Walla, "Carotenoid–chlorophyll coupling and fluorescence quenching in aggregated minor PSII proteins CP24 and CP29", Photosynth. Res., 124, 171-180 (2015).
C.-C. Lin, J. Seikowski, A. Pérez-Lara, R. Jahn, C. Höbartner, P. J. Walla, "Control of membrane gaps by synaptotagmin-Ca2+ measured with a novel membrane distance ruler", Nature Commu., 5, 5859 (2014).
P.-J. Walla, C.-P. Holleboom, G. R. Fleming, "Electronic Carotenoid-Chlorophyll Interactions Regulating Photosynthetic Light Harvesting of Higher Plants and Green Algae", in: Demmig-Adams B., Adams W. W. III, Garab G., Govindjee (eds.), "Non-Photochemical Fluorescence Quenching and Energy Dissipation in Plants, Algae, and Cyanobacteria", Vol. 40 Series: Advances in Photosynthesis and Respiration, 40, 229-243 (2014).
P. J. Walla,"Modern Biophysical Chemistry, 2nd Edition", Wiley-VCH (2014)
Y. Park, W. Vennekate, H. Yavuz, J. Preobraschenski, J. M. Hernandez, D. Riedel, P. J. Walla, R. Jahn,"a-SNAP Interferes with the Zippering of the SNARE Protein Membrane Fusion Machinery" J. Bio. Chem.,, 289, 16326-16335 (2014).
N. Hafi, M. Grunwald, L. S. van den Heuvel, T. Aspelmeier, J.-H. Chen, M. Zagrebelsky, O. M. Schütte, C. Steinem, M. Korte, A. Munk and P. J. Walla, "Fluorescence nanoscopy by polarization modulation and polarization angle narrowing", Nat. Methods, 11, 579-584 (2014), Nature Methods, 13, 101, (2015).
C.-P. Holleboom, P. J. Walla,"The back and forth of energy transfer between carotenoids and chlorophylls and its role in the regulation of light harvesting", Photosynth. Res., 119, 215-221 (2014).
L. Wilk, M. Grunwald, P.-N. Liao, P. J. Walla*, W. Kühlbrandt*,"Direct interaction of the major light-harvesting complex II and PsbS in nonphotochemical quenching", PNAS, 110, 5452-5456 (2013).
C.-P. Holleboom, S. Yoo, P.-N. Liao, I. Compton, W. Haase, H. Kirchhoff, and P. J. Walla, "Carotenoid-Chlorophyll Coupling and Fluorescence Quenching Correlate with Protein Packing Density in Grana-Thylakoids",J. Phys. Chem. B, 117 (38), 11022-11030 (2013)
F. Munari, S. Soeroes, H. M. Zenn, A. Schomburg, N. Kost, S. Schroeder, R. Klingberg, N. Rezaei-Ghaleh, A. Stuetzer, K. A. Gelato, P. J. Walla, S. Becker, D. Schwarzer, B. Zimmermann, W. Fischle and M. Zweckstetter,"Methylation of K9 in histon H3 directs alternative modes of highly dynamic interaction of heterochromatin protein hHP1bwith the nucleosome", J. Biol. Chem., 287, 33756-33765 (2012).
W. Vennekate, S. Schröder, C.-C. Lin, G. van den Bogaart, M. Grunwald, R. Jahn, P. J. Walla,"Cis- and trans-membrane interactions of synaptotagmin-1", PNAS, 109, 11037-11042 (2012).
J. M. Hernandez, A. Stein, E. Behrmann, D. Riedel, A. Cypionka, Z. Farsi, P. J. Walla, S. Raunser and R. Jahn,"Membrane Fusion Intermediates via Directional and Full Assembly of the SNARE Complex", Science, 336, 1581-1584 (2012).
P.-N. Liao, S. Pillai, M. Kloz, D. Gust, A. L. Moore, T. A. Moore, J. T.M. Kennis, R. van Grondelle, and P. J. Walla,"On the role of excitonic interactions in carotenoid-phthalocyanine dyads and implications for photosynthetic regulation",Photosynth. Res., 111, 237-243 (2012).
C. Ilioaia, M. P. Johnson, P.-N. Liao, A. A. Pascal, R. van Grondelle, P. J. Walla, A. V. Ruban, and B. Robert,"Photoprotection in plants involves a change in lutein 1 binding domain in the major light-harvestingcomplex of photosystem II", J. Biol. Chem., 286, 27247-27254 (2011).
P.-N. Liao, S. Pillai, D.Gust, T.A. Moore, A.L. Moore, and P.J. Walla, "Two-photon study on the electronic interactions between the first excited singlet states in carotenoid-tetrapyrrole dyads" J. Phys. Chem. A,, 115, 4082-4091 (2011).
P.-N. Liao, C.-P. Holleboom, L. Wilk, W. Kühlbrandt, P. J. Walla, "Correlation of Car S1 --> Chl with Chl --> Car S1 Energy Transfer Supports the Excitonic Model in Quenched Light Harvesting Complex II", J. Phys. Chem. B, 114, 15650-15655 (2010).
P. J. Walla, "Regulation der Photosynthese:Gangschaltung für die Speicherung solarer Energie", Chemie in unserer Zeit, 44, 1, 66-67 (2010).
P.-N. Liao, S. Bode, L. Wilk, N. Hafi, P. J. Walla, "Correlation of electronic carotenoid–chlorophyll interactions and fluorescence quenching with the aggregation of native LHC II and chlorophyll deficient mutants", Chemical Physics, 373, 1-2, 50-55 (2010).
H. Hippchen, W. H. Pohl, P. J. Walla, "Single-Particle Identification of Encoded Nanospheres", Journal of Biomolecular Screening, 15, 2, 218-223 (2010).
A. Cypionka , A. Stein , J. M. Hernandez , H. Hippchen , R. Jahn , P. J. Walla"Discrimination between docking and fusion of liposomes reconstituted with neuronal SNARE-proteins using FCS", PNAS, 106, 44, 18575-18580 (2009).
S. Bode, C. C. Quentmeier, P. N. Liao, N. Hafi, T. Barros, L. Wilk, F. Bittner, P. J. Walla "On the regulation of photosynthesis by excitonic interactions between carotenoids and chlorophylls", PNAS, 106, 30, 12311-12316 (2009).
S. Quentmeier, C. C. Quentmeier, P. J. Walla , K.-H. Gericke "Two-Color Two-Photon Excitation of Intrinsic Protein Fluorescence: Label-Free Observation of Proteolytic Digestion of Bovine Serum Albumin", ChemPhysChem, 10, 1607-1213 (2009).
P. J. Walla,"Modern Biophysical Chemistry", Wiley-VCH (2009)
U. Haupts, O. Hesse, M. Strerath, P. J. Walla and W. M. Coco "Confocal and Conventional Fluorescence-Based High Throughput Screening in Protein Engineering", in Protein Engineering Handbook , Lutz, Stefan / Bornscheuer, Uwe Theo (eds.) (2008).
S. Bode, C. C. Quentmeier; P.-N. Liao, T. Barros, P. J. Walla,"Xanthophyll-cycle dependence of the energy transfer between carotenoid dark states and chlorophylls in NPQ mutants of living plants and in LHC II", Chemical Physics Letters, 450, Issues 4-6, 379-385 (2008).
A. Wehling, W. H. Pohl, B. Gerke, S. Kipp, P. J. Walla, "Generation of nanopores down to 10 nm for the use in deep-nulling interferometry", ChemPhysChem 9, Issue 2, 327-331 (2008).
P. J. Walla, "Microscope" WO/2007/020272 (2007)
P. J. Walla, U. Kettling, A. Koltermann,"Multi-Parameter fluorimetric analysis in a massively parallel multi-focal arrangement and the use thereof"" US7170598 (2007).
C. C. Quentmeier, A. Wehling and P. J. Walla,"A bioassay based on the ultrafast response of a reporter molecule", Journal of Biomolecular Screening 2 No.3, 341-350, (2007).
D. Zwilling, A. Cypionka, W. Pohl, D. Fasshauer, P. J. Walla, M. Wahl, R. Jahn,"Early endosomal SNAREs form a structurally conserved SNARE complex and fuse liposomes with multiple topologies",EMBO Journal 26 (1),9-18, (2007).
A. Wehling and P. J. Walla,"A Two-Photon Excitation Study on the Role of Carotenoid Dark States in the Regulation of Plant Photosynthesis", Photosynthesis Research 90 Nr. 2, 101-110, (2006).
See also Erratum, Photosynthesis Research, 90 (3), 263-264 (2006).
W. Pohl, H. Hellmuth, M. Hilbert, J. Seibel and Peter J. Walla,"A two-photon fluorescence correlation study of lectins interacting with carbohydrated 20 nm beads", ChemBioChem 7, 268-274, (2006).
Jan S. Frähmcke and Peter J. Walla,"Coulombic couplings between pigments in the major light-harvesting complex LHC II calculated by the transition density cube method", Chemical Physics Letters 430, Issues 4-6, 397-403 2006).
M. Hilbert, H. Hippchen, A. Wehling and P. J. Walla,"Correlational analysis of proteins and non-metallic nano particles in a deep-nulling microscope", Journal of Physical Chemistry B , 109, 18162-18170, (2005)
A. Wehling and P. J. Walla, "Timeresolved Two-Photon Spectroscopy of PS I determines hidden Energy Path Ways", The Journal of Physical Chemistry B 109, 24510-24516(2005).
P. J. Walla and B. Nickel "Intramolecular proton transfer and tunnelling reactions of hydroxyphenylbenzoxazole derivatives in Xenon at 15 K", ,Chemical Physics 312, 177-185 (2005).
P. J. Walla, "New Frontiers in optical single molecule detection - Nanoparticle analysis based on deep-nulling interferometry?", MPIbpc News 1-2, 1-5 (2005).
M. Hilbert, P. J. Walla "Correlational analysis of proteins and non-metallic nano particles in a deep-nulling microscope", MPIbpc News 9, 18-19 (2005).
P. J.Walla, "Wellenfront-Analyse Mikroskop", patent application (2005).
M. Hilbert, A. Wehling, E. Schlodder and P. J. Walla,"Two-photon sensitized fluorescence and excitation spectra of photosystem I of Thermosynechococcus elongatus", The Journal of Physical Chemistry B 108, 13022-13030 (2004).
P. J. Walla, U. Kettling, A. Koltermann, M. Scharte, "Multi-Parameter fluorimetric analysis in a massively parallel multi-focal arrangement and the use thereof" WO/2004/036195, PCT/EP2003/011437, EP 1411345 (2004).
P. J. Walla, P. A. Linden, K. Ohta, G. R. Fleming,"Excited-State Kinetics of the Carotenoid S1 State in LHC II and Two-Photon Excitation Spectra of Lutein and β-Carotene in Solution: Efficient Car S1 → Chl Electronic Energy Transfer via Hot S1 States?", The Journal of Physical Chemistry A 106, 1909-1916 (2002).
C.-P. Hsu, P. J. Walla, M. Head-Gordon, G. R. Fleming,"The Role of the S1 State of carotenoids in Photosynthetic Energy Transfer: The Light Harvesting Complex II of Purple Bacteria", The Journal of Physical Chemistry B 105, 11016-11025 (2001).
P. J. Walla, P. A. Linden, C.–P. Hsu, G. D. Scholes and G. R. Fleming,"Femtosecond dynamics of the forbidden carotenoid S1 state in light-harvesting complexes of purple bacteria observed after two-photon excitation", Proc. Natl. Acad. Sci. 97, 10808–-0813 (2000).
P. J. Walla, P. A. Linden and G. R. Fleming, "Fs-transient Absorption and Fluorescence Upconversion after Two-Photon Excitation of Carotenoids in solution and in LHC II", in Ultrafast Phenomena XII, T. Elsaesser,S. Mukamel, M. Murmane, N. F., Eds., Springer: New York, 671-673, (2000).
P. J. Walla, J. Yom, B. P. Krueger and G. R. Fleming,"Two-Photon Excitation Spectrum of Light-Harvesting Complex II and Fluorescence Upconversion after One- and Two-photon Excitation of the Carotenoids", The Journal of Physical Chemistry B 104, 4799-4806 (2000).
B. P. Krueger, J. Yom, P. J. Walla and G. R. Fleming,"Observation of the S1 state of spheroidene in LH2 by two-photon fluorescence excitation", Chem. Phys. Lett. 310, 57-64 (1999).
P. J. Walla, F. Jelezko, Ph. Tamarat, B. Lounis and M. Orrit,"Perylene in biphenyl and anthracene crystals: an example of the influence of the host on single-molecule signals", Chem. Phys. 233, 117-125 (1998).
B. Nickel and P. J. Walla,"Peculiarity of triplet-triplet energy transfer from 2-(2´-hydroxyphenyl)benzoxazole to diacetyl. Evidence for radiative keto-enol transitions 3K*→1E and 1E→1K* ", Chem. Phys. 237, 371–394 (1998).
B. Nickel, K. H. Grellmann, J. S. Stephan and P. J. Walla, "Keto-enol tautomerism in the triplet state of hydroxyphenylbenzoxazoles in an alkane glass: hydrogen tunneling and isotope effects down to 2 K", Ber.Bunsenges. Phys. Chem. 102, 436-447 (1998).