Article
Multidisciplinary Sciences
Zixi Hu, Jeffrey J. Donatelli, James A. Sethian
Summary: The coefficients for translational and rotational diffusion characterize Brownian motion of particles. The paper proposes a new approach for predicting rotational diffusion coefficient using angular-temporal cross-correlation analysis of XPCS data, which has been verified across a range of simulated data. This method is applicable beyond the specific wavelengths used in the experiments.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Chemistry, Multidisciplinary
Vincent F. D. Peters, Alvaro Gonzalez Garcia, Henricus H. Wensink, Mark Vis, Remco Tuinier
Summary: This study predicts the phase behavior of athermal rod-polymer mixtures using analytical equations of state for hard rod dispersions and free volume theory. It shows that various types of phase states can coexist depending on concentrations, rod aspect ratio, and polymer-rod size ratio, including novel two-, three-, and four-phase coexistences and isostructural coexistences. This work provides insight into conditions for particular multiphase coexistences in well-defined model colloidal rod-polymer mixtures.
Article
Chemistry, Applied
Andrey Vladimirovich Blinov, Shahida Anusha Siddiqui, Anastasiya Alexandrovna Blinova, Andrey Georgievich Khramtsov, Natalya Pavlovna Oboturova, Andrey Ashotovich Nagdalian, Alexander Nikolaevich Simonov, Salam A. Ibrahim
Summary: This study analyzed and diagnosed the dispersed composition of milk using photon correlation spectroscopy. The limitations of this method in complex colloidal systems were found, and the optimal measurement parameters were determined.
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
(2022)
Article
Polymer Science
Chao-Hung Cheng, Kazutaka Kamitani, Shiori Masuda, Kiyu Uno, Nattanee Dechnarong, Taiki Hoshino, Ken Kojio, Atsushi Takahara
Summary: X-ray photon correlation spectroscopy (XPCS) was used to analyze the dynamics of a polymer nanocomposite, confirming the temperature-dependent effect on SiNP core motion and the anisotropic dynamics of SiNPs during uniaxial elongation and stress relaxation.
Article
Computer Science, Software Engineering
Carlos A. Garcia-Cadena, Abraham de J. Aguilar-Uribe, Luis F. Rojas-Ochoa
Summary: PhotonSTR-T18 is a LabVIEW-based software package for calculating intensity correlation and structure functions of scattered photons. The analysis of data acquired from model colloidal nanoparticles validates the software's reliability and applicability in photon correlation spectroscopy.
Article
Chemistry, Physical
Hailong Li, Marjorie Ladd-Parada, Aigerim Karina, Francesco Dallari, Mario Reiser, Fivos Perakis, Nele N. Striker, Michael Sprung, Fabian Westermeier, Gerhard Gruebel, Werner Steffen, Felix Lehmkuehler, Katrin Amann-Winkel
Summary: This study investigates the dynamics of the transition from high-density amorphous ice (HDA) to low-density amorphous ice (LDA) using X-ray photon correlation spectroscopy (XPCS). The results reveal non-isotropic and heterogeneous dynamics in the amorphous ice and are consistent with a scenario of static LDA islands floating within a diffusive matrix of high-density liquid water.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Bing Gu, Shaul Mukamel
Summary: In this study, we theoretically investigate a photon-coincidence counting technique for measuring the entanglement between two optical cavities connected by an optical waveguide. Through the selective probe of delocalized doubly excited polariton states, we analyze the second-order correlation function of emitted photons to reveal intercavity correlations. Moreover, the coincidence counting signal in the frequency domain provides information about the transition frequencies between different polariton states.
Article
Polymer Science
Ruibin Mo, Fusheng Zhang, Xinxin Sheng, Xinya Zhang
Summary: The vibrationally resolved pyrene fluorescence probe method has become less popular due to limited sensitivity and concentration independence. However, the recent discovery of a pyrene acylhydrazone with concentration- and polarity-dependent fluorescence spectra has provided a powerful vibrationally resolved spectrum probe.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Mainak Dhar, Joseph A. Dickinson, Mark A. Berg
Summary: This study presents a nonparametric method for separating signal from noise using nonlinear-correlation functions. The method does not require a priori model, knowledge of system continuity or discreteness, fixed number of states, or knowledge of system Markovian property. The noise-corrected, nonlinear-correlation functions can be converted to system's Green's function and yield the system's equilibrium-probability distribution. Experimental results show that the proposed correlation method has better resolution in time and state space compared to other nonparametric approaches.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Jianheng Li, Meera Madhavi, Spencer Jeppson, Louie Zhong, Eric M. Dufresne, Bruce Aitken, Sabyasachi Sen, Roopali Kukreja
Summary: This study directly investigates the structural relaxation processes in a molecular chalcogenide glass sample using X-ray photon correlation spectroscopy (XPCS). Two different dynamical regimes were observed: slow dynamics dominated by X-ray-photon-induced effects at low temperatures, and dynamics primarily attributed to the intermolecular correlation of molecules at high temperatures. The length scales of the relaxation process in the glass were found to extend beyond the individual molecule, providing valuable insights into the dynamics of glassy materials.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Materials Science, Multidisciplinary
Jakob Schedlbauer, Sabrina Streicher, Michael Forster, Ullrich Scherf, Jan Vogelsang, John M. Lupton
Summary: The interaction between light and matter in organic semiconductors is influenced by the dimension of the domain within the material. In this study, the effect of exciton mobility on photon antibunching and bunching was examined using ladder-type poly(para-phenylene) nanoparticles. The results show that triplet diffusion is not significant in the singlet-triplet annihilation process.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Xue Dong, Geng Tong, Xuankun Song, Xingchen Xiao, Yiting Yu
Summary: This study demonstrates a flexible multiline scanning hyperspectral microscopy system using a digital micromirror device (DMD) that can adjust the number of scanning lines for improved detection efficiency. Imaging experiments on various samples show the great potential of this system in cellular biology and material analysis. The on-chip scanning process also makes the system compact, lightweight, portable, and not constrained by location.
MICROSYSTEMS & NANOENGINEERING
(2021)
Article
Optics
Qingmei Hu, Junhua Dong, Jianbo Yin, Bingsuo Zou, Yongyou Zhang
Summary: The study examines the scattering and correlation properties of a two-photon pulse in a four-terminal waveguide system where two one-dimensional waveguides are connected by a Jaynes-Cummings emitter (ICE). It is found that when the width of the incident two-photon Gaussian pulse is much larger than the photon wavelength, the transmission spectra approach that of single photon cases. However, when the pulse width is comparable to the photon wavelength, both transmission and correlation show strong dependence on the pulse width. Resonant scattering and photon interference play significant roles in determining the two-photon correlation in the system.
Article
Biotechnology & Applied Microbiology
Veronica Vespini, Simonetta Grilli, Pietro Ferraro, Romina Rega, Heidi Ottevaere, Yunfeng Nie, Pellegrino Musto, Marianna Pannico
Summary: The pyro-electrohydrodynamic jet printing technology was used to fabricate confined assemblies of gold nanoparticles and evaluated for its surface-enhanced Raman spectroscopy (SERS) performance. The results showed strong plasmonic effects, reproducible signals, and affinity with biomolecules, indicating potential applications in biosensing.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Remya Ann Mathews Kalapurakal, Brunno C. Rocha, Harish Vashisth
Summary: Colloids with lobed architectures can self-assemble into porous structures with biomedical applications. However, polydispersity in particle designs, which includes variations in the numbers, sizes, and positions of lobes, can significantly affect the self-assembled structures. This study uses Langevin dynamics simulations to investigate the effect of polydispersity due to non-uniform lobe sizes on self-assembly in three experimentally observable designs (dumbbell, trigonal planar, and tetrahedral) and suggests that increasing the number of lobes can minimize the effect of polydispersity and tune the self-assembled structures.
ACS APPLIED BIO MATERIALS
(2023)