Peter Hamm
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View article: Universal structure in the relaxation of photoactive proteins
Universal structure in the relaxation of photoactive proteins Open
The nonequilibrium relaxation of a series of, in part, very different photoactive proteins is compared, ranging over up to eleven decades in time. The series comprises various PDZ domains and MCL 1/peptide complexes with artificial azobenz…
View article: Versatile femtosecond laser synchronization for multiple-timescale transient infrared spectroscopy 2.0
Versatile femtosecond laser synchronization for multiple-timescale transient infrared spectroscopy 2.0 Open
A versatile and easy-to-implement concept is presented, which allows one to time-synchronize in essence any amplified Ti:Sa laser system to a high-repetition rate Yb-laser system. The oscillator round trip frequency of one of the oscillato…
View article: Bridging Evolution and Design: Mapping the Diversity of LOV Photosensors
Bridging Evolution and Design: Mapping the Diversity of LOV Photosensors Open
Light-sensitive proteins allow organisms to perceive and respond to their environment, and have diversified over billions of years. Among these, Light–Oxygen–Voltage (LOV) domains are widely distributed photosensors that control diverse ph…
View article: Unveiling the Activation Pathway of the CO<sub>2</sub> Reduction Catalyst <i>trans</i>(Cl)-[Ru(X,X′-dimethyl-2,2′-bipyridine)(CO)<sub>2</sub>Cl<sub>2</sub>] by Direct Spectroscopic Observation
Unveiling the Activation Pathway of the CO<sub>2</sub> Reduction Catalyst <i>trans</i>(Cl)-[Ru(X,X′-dimethyl-2,2′-bipyridine)(CO)<sub>2</sub>Cl<sub>2</sub>] by Direct Spectroscopic Observation Open
We report on the activation pathway of a series of CO2 reduction catalysts, trans(Cl)-[Ru(X,X'-dimethyl-2,2'-bipyridine)(CO)2Cl2], with a focus on trans(Cl)-[Ru(6,6'-dimethyl-2,2'-bipyridine)(CO)2Cl2]), in the presence of the reductive que…
View article: Toward an FPGA-based dedicated computer for molecular dynamics simulations
Toward an FPGA-based dedicated computer for molecular dynamics simulations Open
First steps toward a molecular dynamics (MD) implementation in a cluster of field-programmable gate arrays (FPGAs) are presented, reaching a simulation speed of a few microseconds/day. The nodes in this cluster are programmed into a mid-ra…
View article: 2D Raman-THz spectroscopy of imidazolium-based ionic liquids
2D Raman-THz spectroscopy of imidazolium-based ionic liquids Open
An investigation of the low-frequency (i.e., less than 5 THz), inter-molecular dynamics of three imidazolium-based ionic liquids—1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C4mim][NTf2]), 1-butyl-3-methylimidazolium dic…
View article: High-sensitivity pump-probe spectroscopy with a dual-comb laser and a PM-Andi supercontinuum
High-sensitivity pump-probe spectroscopy with a dual-comb laser and a PM-Andi supercontinuum Open
Amplifier-based pump-probe systems, while versatile, often suffer from complexity and low measurement speeds, especially when probing samples require low excitation fluences. To address these limitations, we introduce a pump-probe system t…
View article: <i>χ</i> (2)-induced artifact overwhelming the third-order signal in 2D Raman–THz spectroscopy of non-centrosymmetric materials
<i>χ</i> (2)-induced artifact overwhelming the third-order signal in 2D Raman–THz spectroscopy of non-centrosymmetric materials Open
Through comprehensive data analysis, we demonstrate that a χ(2)-induced artifact, arising from imperfect balancing in the conventional electro-optic sampling detection scheme, contributes significantly to the measured signal in 2D Raman–TH…
View article: FullThrOTTLE-TrIR: Time-Resolved IR Spectroscopy of Electrochemically Generated Species Using a Full Throughput Optically Transparent Thin-Layer Electrochemical Cell
FullThrOTTLE-TrIR: Time-Resolved IR Spectroscopy of Electrochemically Generated Species Using a Full Throughput Optically Transparent Thin-Layer Electrochemical Cell Open
An optically transparent thin-layer electrochemical cell with stopped-flow sample transport has been developed for optical-pump infrared-probe transient absorption spectroscopy of prereduced or preoxidized molecules. Time-resolved IR-spect…
View article: Force Fields for Deep Eutectic Mixtures: Application to Structure and 2D-Infrared Spectroscopy
Force Fields for Deep Eutectic Mixtures: Application to Structure and 2D-Infrared Spectroscopy Open
Parametrizing energy functions for ionic systems can be challenging. Here, the total energy function for an eutectic system consisting of water, SCN$^-$, K$^+$ and acetamide is improved vis-a-vis experimentally measured properties. Given t…
View article: High-Sensitivity Pump-Probe Spectroscopy with a Dual-Comb Laser and a PM-ANDi Supercontinuum
High-Sensitivity Pump-Probe Spectroscopy with a Dual-Comb Laser and a PM-ANDi Supercontinuum Open
Amplifier-based pump-probe systems, while versatile, often suffer from complexity and low measurement speeds, especially when probing samples requiring low excitation fluences. To address these limitations, we introduce a pump-probe system…
View article: High-Sensitivity Pump-Probe Spectroscopy with a Dual-Comb Laser and a PM-ANDi Supercontinuum
High-Sensitivity Pump-Probe Spectroscopy with a Dual-Comb Laser and a PM-ANDi Supercontinuum Open
Amplifier-based pump-probe systems, while versatile, often suffer from complexity and low measurement speeds, especially when probing samples requiring low excitation fluences. To address these limitations, we introduce a pump-probe system…
View article: $χ^{(2)}$-Induced Artifact Overwhelming the Third-Order Signal in 2D Raman-THz Spectroscopy of Non-Centrosymmetric Materials
$χ^{(2)}$-Induced Artifact Overwhelming the Third-Order Signal in 2D Raman-THz Spectroscopy of Non-Centrosymmetric Materials Open
Through comprehensive data analysis, we demonstrate that a $χ^{(2)}$-induced artifact, arising from imperfect balancing in the conventional electro-optic sampling (EOS) detection scheme, contributes significantly to the measured signal in …
View article: A billion years of evolution manifest in nanosecond protein dynamics
A billion years of evolution manifest in nanosecond protein dynamics Open
Protein dynamics form a critical bridge between protein structure and function, yet the impact of evolution on ultrafast processes inside proteins remains enigmatic. This study delves deep into nanosecond-scale protein dynamics of a struct…
View article: A billion years of evolution manifest in nanosecond protein dynamics
A billion years of evolution manifest in nanosecond protein dynamics Open
Protein dynamics form a critical bridge between protein structure and function, yet the impact of evolution on ultrafast processes inside proteins remains enigmatic. This study delves deep into nanosecond-scale protein dynamics of a struct…
View article: Breaking Barriers in Ultrafast Spectroscopy and Imaging Using 100 kHz Amplified Yb-Laser Systems
Breaking Barriers in Ultrafast Spectroscopy and Imaging Using 100 kHz Amplified Yb-Laser Systems Open
ConspectusUltrafast spectroscopy and imaging have become tools utilized by a broad range of scientists involved in materials, energy, biological, and chemical sciences. Commercialization of ultrafast spectrometers including transient absor…
View article: Versatile Femtosecond Laser Synchronization for Multiple-Timescale Transient IR Spectroscopy
Versatile Femtosecond Laser Synchronization for Multiple-Timescale Transient IR Spectroscopy Open
Data for "Versatile Femtosecond Laser Synchronization for Multiple-Timescale Transient IR Spectroscopy", to appear in J. Chem Phys. A
View article: Versatile Femtosecond Laser Synchronization for Multiple-Timescale Transient IR Spectroscopy
Versatile Femtosecond Laser Synchronization for Multiple-Timescale Transient IR Spectroscopy Open
Data for "Versatile Femtosecond Laser Synchronization for Multiple-Timescale Transient IR Spectroscopy", to appear in J. Chem Phys. A
View article: Versatile Femtosecond Laser Synchronization for Multiple-Timescale Transient IR Spectroscopy
Versatile Femtosecond Laser Synchronization for Multiple-Timescale Transient IR Spectroscopy Open
Several ways to electronically synchronize different types of amplified femtosecond laser systems are presented, based on a single freely programmable electronics hardware: Arbitrary-detuning asynchronous optical sampling, as well as activ…
View article: Breaking Barriers in Ultrafast Spectroscopy and Imaging Using 100 kHz Amplified Yb-Laser Systems
Breaking Barriers in Ultrafast Spectroscopy and Imaging Using 100 kHz Amplified Yb-Laser Systems Open
Ultrafast spectroscopy and imaging have become tools utilized by a broad range of scientists involved in materials, energy, biological, and chemical sciences. Commercialization of ultrafast spectrometers including transient absorption spec…
View article: MCL-1 promiscuity and the structural resilience of its binding partners
MCL-1 promiscuity and the structural resilience of its binding partners Open
The allosteric protein MCL-1 and its natural inhibitors, the BH3-only proteins PUMA, BIM, and NOXA regulate apoptosis by interacting promiscuously within an entangled binding network. Little is known about the transient processes and dynam…
View article: Transient 2D IR spectroscopy and multiscale simulations reveal vibrational couplings in the Cyanobacteriochrome Slr1393-g3
Transient 2D IR spectroscopy and multiscale simulations reveal vibrational couplings in the Cyanobacteriochrome Slr1393-g3 Open
Cyanobacteriochromes are bi-stable photoreceptor proteins with desirable photochemical properties for biotechnological applications such as optogenetics or fluorescence microscopy. Here, we investigated Slr1393-g3, a cyanobacteriochrome th…
View article: Low-frequency anharmonic couplings in crystalline bromoform: Theory
Low-frequency anharmonic couplings in crystalline bromoform: Theory Open
Theoretical calculations of the low-frequency anharmonic couplings of the β-phase of crystalline bromoform are presented based on density functional theory quantum chemistry calculations. The electrical and mechanical anharmonicities betwe…
View article: MCL-1 promiscuity and the structural resilience of its binding partners
MCL-1 promiscuity and the structural resilience of its binding partners Open
MCL-1 and its natural inhibitors, the BH3-only proteins PUMA, BIM, and NOXA regulate apoptosis by interacting promiscuously within an entangled binding network. Little is known about the transient processes and dynamic conformational fluct…
View article: Secure and Privacy-Preserving Identity and Access Management in CREDENTIAL
Secure and Privacy-Preserving Identity and Access Management in CREDENTIAL Open
In an increasingly interconnected world, establishing trust between end users and service providers with regards to privacy and data protection is becoming increasingly important. Consequently, CREDENTIAL, funded under the European Union's…
View article: Vibrational couplings between protein and cofactor in bacterial phytochrome Agp1 revealed by 2D-IR spectroscopy
Vibrational couplings between protein and cofactor in bacterial phytochrome Agp1 revealed by 2D-IR spectroscopy Open
Phytochromes are ubiquitous photoreceptor proteins that undergo a significant refolding of secondary structure in response to initial photoisomerization of the chromophoric group. This process is important for the signal transduction throu…
View article: Structure, Organization, and Heterogeneity of Water-Containing Deep Eutectic Solvents
Structure, Organization, and Heterogeneity of Water-Containing Deep Eutectic Solvents Open
The spectroscopy and structural dynamics of a deep eutectic mixture (KSCN/acetamide) with varying water content is investigated from 2D IR (with the C-N stretch vibration of the SCN- anions as the reporter) and THz spectroscopy. Molecular …
View article: Low-frequency anharmonic couplings in bromoform revealed from 2D Raman-THz spectroscopy: From the liquid to the crystalline phase
Low-frequency anharmonic couplings in bromoform revealed from 2D Raman-THz spectroscopy: From the liquid to the crystalline phase Open
Raw data for "Low-frequency anharmonic couplings in bromoform revealed from 2D Raman-THz spectroscopy: From the liquid to the crystalline phase"
View article: Low-frequency anharmonic couplings in bromoform revealed from 2D Raman-THz spectroscopy: From the liquid to the crystalline phase
Low-frequency anharmonic couplings in bromoform revealed from 2D Raman-THz spectroscopy: From the liquid to the crystalline phase Open
Raw data for "Low-frequency anharmonic couplings in bromoform revealed from 2D Raman-THz spectroscopy: From the liquid to the crystalline phase"