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Journal articles on the topic 'Linear dichroism (LD)'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Sharma, Vishakha, Yogita Kalra, and Ravindra Kumar Sinha. "Chiral perovskite based metasurface for linear and circular dichroism." Journal of Optics 26, no. 12 (2024): 125103. http://dx.doi.org/10.1088/2040-8986/ad80a7.

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Abstract Chiral metasurfaces provide ultracompact devices for polarization modification and detection. In this paper, high linear dichroism (LD) and dual band circular dichroism (CD) using superstructural chiral structure with inbuilt resonance cavities based on metal perovskite metal layer is proposed. Under circularly polarised incident waves, the metasurface exhibits a dual-band CD with a maximum value of 0.81. On the other hand, the suggested design also accomplishes efficient LD of 0.95. Additionally, independent control over each resonance wavelength may be attained by modifying paramete

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Takahashi, Masayuki, and Bengt Norden. "Linear Dichroism Measurements for the Study of Protein-DNA Interactions." International Journal of Molecular Sciences 24, no. 22 (2023): 16092. http://dx.doi.org/10.3390/ijms242216092.

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Linear dichroism (LD) is a differential polarized light absorption spectroscopy used for studying filamentous molecules such as DNA and protein filaments. In this study, we review the applications of LD for the analysis of DNA-protein interactions. LD signals can be measured in a solution by aligning the sample using flow-induced shear force or a strong electric field. The signal generated is related to the local orientation of chromophores, such as DNA bases, relative to the filament axis. LD can thus assess the tilt and roll of DNA bases and distinguish intercalating from groove-binding liga

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3

Razmkhah, Kasra, Nikola Paul Chmel, Matthew I. Gibson, and Alison Rodger. "Oxidized polyethylene films for orienting polar molecules for linear dichroism spectroscopy." Analyst 139, no. 6 (2014): 1372–82. http://dx.doi.org/10.1039/c3an02322b.

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4

Cheng, Bo, Yuxiao Zou, and Guofeng Song. "Full Stokes Mid-Wavelength Infrared Polarization Photodetector Based on the Chiral Dielectric Metasurface." Photonics 11, no. 6 (2024): 571. http://dx.doi.org/10.3390/photonics11060571.

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Conventional imaging techniques can only record the intensity of light while polarization imaging can record the polarization of light, thus obtaining a higher dimension of image information. We use the COMSOL software to numerically propose a circular polarization photodetector composed of the dislocated 2-hole Si chiral metasurfaces controlling the circular polarization lights and the HgCdTe (MCT) photodetector chip to detect the intensity of light signals. The chiral metasurfaces can be equated to a significant radiation source of the Z-type current density under the right circularly polari

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Xie, Huifang, Xin Ma, Wenbin Lin, et al. "Linear Dextrin as Potential Insulin Delivery System: Effect of Degree of Polymerization on the Physicochemical Properties of Linear Dextrin–Insulin Inclusion Complexes." Polymers 13, no. 23 (2021): 4187. http://dx.doi.org/10.3390/polym13234187.

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In the current study, linear dextrin (LD) was prepared using waxy potato starch debranched with pullulanase, which has attracted immense interest in the food, pharmaceutical, and cosmetic industries as a versatile ingredient. Various LDs were separated on the basis of their differential solubility in aqueous/ethanol solutions of different volumetric ratios. Three LD products—LD Fabrications with 40% ethanol (F-40); LD Fabrications with 50% ethanol (F-50); and LD Fabrications with 60%, 70%, and 80% ethanol (F-M)—were obtained with an average degree of polymerization (DP) values of 31.44, 21.84,

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Ali, Aysha, Haydn A. Little, Jake G. Carter, et al. "Combining bacteriophage engineering and linear dichroism spectroscopy to produce a DNA hybridisation assay." RSC Chemical Biology 1, no. 5 (2020): 449–54. http://dx.doi.org/10.1039/d0cb00135j.

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A novel DNA sensing method based on LD spectroscopy and using bionanoparticle scaffolds is described, as demonstrated by the rapid detection of DNA strands associated with bacterial and viral pathogens.

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Günther, Lisa M., Jasper Knoester, and Jürgen Köhler. "Limitations of Linear Dichroism Spectroscopy for Elucidating Structural Issues of Light-Harvesting Aggregates in Chlorosomes." Molecules 26, no. 4 (2021): 899. http://dx.doi.org/10.3390/molecules26040899.

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Linear dichroism (LD) spectroscopy is a widely used technique for studying the mutual orientation of the transition-dipole moments of the electronically excited states of molecular aggregates. Often the method is applied to aggregates where detailed information about the geometrical arrangement of the monomers is lacking. However, for complex molecular assemblies where the monomers are assembled hierarchically in tiers of supramolecular structural elements, the method cannot extract well-founded information about the monomer arrangement. Here we discuss this difficulty on the example of chloro

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8

Lee, Changyun, Lindan Gong, Youngku Shon, et al. "Bis-intercalation of a cationic porphyrin dimer linked with trietylene glycol derivative to DNA from the major groove." Journal of Porphyrins and Phthalocyanines 16, no. 11 (2012): 1159–66. http://dx.doi.org/10.1142/s1088424612501283.

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The binding mode of a porphyrin dimer to double stranded native DNA was investigated in this study using normal electric absorption, circular dichroism (CD) and linear dichroism (LD) spectroscopies. At the time of mixing, the spectral properties of the porphyrin dimer upon its association with DNA were characterized by hypochromism and a red shift in the absorption spectrum and by complicated CD and negative LD in the Soret region. As time elapsed, the CD spectrum became a negative single band and the negative LD signal increased. These spectral changes suggested that the majority of both porp

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9

Takanabe, Akifumi, Masahito Tanaka, Hideko Koshima, Motoo Shiro, and Toru Asahi. "Optical properties of chiral photomechanical salicylideneaniline crystal." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C379. http://dx.doi.org/10.1107/s205327331409620x.

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Mechanical motion caused by UV/VIS radiation onto bulk materials is called a photomechanical effect. In other words, the photomechanical effect is a type of energy conversion systems. Recently, a mechanical bending of photochromic diarylethene crystals was reported, and the molecular-scale motion was found to produce the macroscale bending of the crystals (Kobatake et al., 2007). Subsequently, several photomechanical crystals have been reported to provide promising opportunities for artificial molecular machinery. The mechanism of the conversion of light energy to mechanical energy, however, h

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Taniguchi, Takuya, Kazuhiko Ishikawa, Kenta Nakagawa, Masahito Tanaka, and Toru Asahi. "Measurement of chiroptical properties of nickel sulfate hexahydrate with G-HAUP." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C1779. http://dx.doi.org/10.1107/s2053273314082205.

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A crystal, which belongs to a lower crystal system than cubic one, exhibits optical anisotropies. The optical anisotropies originate from the difference in refraction and absorption between orthogonally linearly polarized lights. When molecules forming a crystal are enantiomers with the same chirality or form helical structures with the same handedness, the crystal shows chiroptical properties, which originate from the difference in refraction and absorption between right and left circularly polarized lights. The four optical phenomena are called linear birefringence (LB), linear dichroism (LD

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11

Shoarinejad, S., and M. S. Zakerhamidi. "Infrared Linear-Dichroism (IR-LD) Study of the Nematic Liquid Crystals Doped with Polymer." Molecular Crystals and Liquid Crystals 547, no. 1 (2011): 135/[1825]—141/[1831]. http://dx.doi.org/10.1080/15421406.2011.572807.

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12

Fenton, Jacob M., Madleen Busse, and Louis M. Rendina. "Synthesis and DNA-Binding Studies of a Dinuclear Gadolinium(III)–Platinum(II) Complex." Australian Journal of Chemistry 68, no. 4 (2015): 576. http://dx.doi.org/10.1071/ch14572.

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The synthesis and characterisation of a new dinuclear GdIII–PtII complex (1·PF6) containing a functionalised macrocyclic 1,4,7,10-tetraazacyclododecane-1,4,7-triacetic acid derivative linked to a PtII-terpy (terpy = 2,2′ : 6′,2″-terpyridine) unit by means of a short thiolato linker are reported. The complex was synthesised in six steps from cyclen by means of a modular synthetic strategy. A preliminary DNA-binding study with calf-thymus DNA (ct-DNA) was performed on 1·PF6 by means of linear dichroism (LD). The observed changes in the DNA LD signal in the presence of the metal complex are fully

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13

Tukova, Anastasiia, and Alison Rodger. "Spectroscopy of model-membrane liposome-protein systems: complementarity of linear dichroism, circular dichroism, fluorescence and SERS." Emerging Topics in Life Sciences 5, no. 1 (2021): 61–75. http://dx.doi.org/10.1042/etls20200354.

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A range of membrane models have been developed to study components of cellular systems. Lipid vesicles or liposomes are one such artificial membrane model which mimics many properties of the biological system: they are lipid bilayers composed of one or more lipids to which other molecules can associate. Liposomes are thus ideal to study the roles of cellular lipids and their interactions with other membrane components to understand a wide range of cellular processes including membrane disruption, membrane transport and catalytic activity. Although liposomes are much simpler than cellular membr

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Kumashiro, Munehiro, Ryoga Tsuji, Shoma Suenaga та Koichi Matsuo. "Formation of β-Strand Oligomers of Antimicrobial Peptide Magainin 2 Contributes to Disruption of Phospholipid Membrane". Membranes 12, № 2 (2022): 131. http://dx.doi.org/10.3390/membranes12020131.

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The antimicrobial peptide magainin 2 (M2) interacts with and induces structural damage in bacterial cell membranes. Although extensive biophysical studies have revealed the interaction mechanism between M2 and membranes, the mechanism of membrane-mediated oligomerization of M2 is controversial. Here, we measured the synchrotron-radiation circular dichroism and linear dichroism (LD) spectra of M2 in dipalmitoyl-phosphatidylglycerol lipid membranes in lipid-to-peptide (L/P) molar ratios from 0–26 to characterize the conformation and orientation of M2 on the membrane. The results showed that M2 c

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15

Murthy, Parvathi S., and Josef Michl. "Conformational analysis by infrared linear dichroism of solutes in stretched polyethylene: The twist angle in biphenyl and 4,4'-dibromobiphenyl." Collection of Czechoslovak Chemical Communications 53, no. 10 (1988): 2366–76. http://dx.doi.org/10.1135/cccc19882366.

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A method is proposed for using the IR linear dichroism of molecules embedded in stretched polyethylene and containing two weakly coupled symmetry-related subunits for the determination of the spatial relationship of the subunits. The procedure requires an IR LD measurement on the parent and on an isotopomer in which the equivalence of the subunits has been removed by isotopic substitution, without affecting the molecular shape or the orientation factors. The method has been tested on biphenyl, found to be planar, and 4,4'-dibromobiphenyl, found to be nearly orthogonally twisted in stretched po

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16

Buffeteau, Thierry, François Lagugné-Labarthet, and Claude Sourisseau. "Vibrational Circular Dichroism in General Anisotropic Thin Solid Films: Measurement and Theoretical Approach." Applied Spectroscopy 59, no. 6 (2005): 732–45. http://dx.doi.org/10.1366/0003702054280568.

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In this study, the measurement of the true vibrational circular dichroism (VCD) spectrum is considered from an experimental and theoretical approach for any general anisotropic thin solid sample exhibiting linear as well as circular birefringence (LB, CB) and dichroism (LD, CD) properties. For this purpose, we have made use of a simple model α-helix polypeptide, namely, the poly(γ-benzyl-L-glutamate) or PBLG, reference sample possessing a well-known VCD spectrum and giving rise to slightly oriented films by deposition onto a solid substrate. Also, we have used a different Fourier transform inf

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17

Khanh, Nguyen Phuong, Nguyen Hoang Tan, Le Thi Hoang Uyen, and Le Thi Hong Ngan. "Skin carcinogenesis in mice using UVB radiation." HO CHI MINH CITY OPEN UNIVERSITY JOURNAL OF SCIENCE - ENGINEERING AND TECHNOLOGY 12, no. 1 (2021): 98–107. http://dx.doi.org/10.46223/hcmcoujs.tech.en.12.1.1880.2022.

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Ultraviolet B (UVB) radiation is directly related to sunburn and other visible changes on the skin surface, including discoloration and skin carcinoma. This study investigates the influence of UVB rays (wavelength from 290-320nm) on the formation of cancerous tissues and also shows the differences between abnormal and normal tissue. The mice were stimulated with DMBA chemical protocol and exposure to UVB radiation for skin carcinogenesis. Normal and cancerous skin tissue were stained with Hematoxylin and Eosin, then were measured to obtain optical properties by applying Mueller-Matrix Decompos

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18

Parrish, Katherine A., Andrew Salij, Kendall R. Kamp, et al. "Differential absorption of circularly polarized light by a centrosymmetric crystal." Science 388, no. 6752 (2025): 1194–97. https://doi.org/10.1126/science.adr5478.

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Crystalline solids are governed by universal structure-property relationships derived from their crystal symmetry, leading to paradigmatic rules on what properties they can and cannot exhibit. A long-held structure-property relationship is that centrosymmetric crystals cannot differentially absorb circularly polarized light. In this study, we demonstrate the design, synthesis, and characterization of the centrosymmetric material Li 2 Co 3 (SeO 3 ) 4 , which violates this relationship not by defying symmetry-imposed selection rules but by invoking a photophysical process not previously characte

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dos Anjos, Eli Heber Martins, Maria Luiza Silveira Mello, and Benedicto de Campos Vidal. "High-Performance Polarization Microscopy Reveals Structural Remodeling in Rat Calcaneal Tendons Cultivated In Vitro." Cells 12, no. 4 (2023): 566. http://dx.doi.org/10.3390/cells12040566.

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Collagenous tissues exhibit anisotropic optical properties such as birefringence and linear dichroism (LD) as a result of their structurally oriented supraorganization from the nanometer level to the collagen bundle scale. Changes in macromolecular order and in aggregational states can be evaluated in tendon collagen bundles using polarization microscopy. Because there are no reports on the status of the macromolecular organization in tendon explants, the objective of this work was to evaluate the birefringence and LD characteristics of collagen bundles in rat calcaneal tendons cultivated in v

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20

Nguyen, Thanh Truc, Duc Minh Nguyen Huu, Thanh-Hai Le, Quoc-Hung Phan, and Thi-Thu-Hien Pham. "Skin cancer detection using effective optical parameters and the classification and regression tree algorithm: A novel framework." Ministry of Science and Technology, Vietnam 65, no. 1 (2023): 63–69. http://dx.doi.org/10.31276/vjste.65(1).63-69.

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Early detection of skin cancer matters because diagnosis, prognosis and treatment plan differ for each skin cancer type at their stages. Medical imaging taking the advantages of the non-invasive and non-ionizing polarized light is emerging as a tool for the development of screening and diagnotic tests. In this work, we proposed a novel framework to classify human melanoma and nonmelanoma skin cancer using the Classification and Regression Tree algorithm (CART). The samples were prepared from twenty-four non-melanoma skin cancer samples (consisting of twelve squamous cell carcinoma and twelve b

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21

Lundahl, P. Johan, Catherine C. Kitts, and Bengt Nordén. "A new highly adaptable design of shear-flow device for orientation of macromolecules for Linear Dichroism (LD) measurement." Analyst 136, no. 16 (2011): 3303. http://dx.doi.org/10.1039/c0an00455c.

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22

Faulhaber, Katja, Anton Granzhan, Heiko Ihmels, and Giampietro Viola. "Detection of biomacromolecules with fluorescent light-up probes." Pure and Applied Chemistry 78, no. 12 (2006): 2325–31. http://dx.doi.org/10.1351/pac200678122325.

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The emission properties of selected benzo[b]quinolizinium (acridizinium) derivatives in the presence of double-stranded DNA and proteins are presented. Spectrophotometric studies and linear dichroism (LD) spectroscopic experiments reveal that benzo[b]quinolizinium derivatives bind to DNA, mainly by intercalation. In contrast to the 9-aminobenzo[b]quinolizinium, which exhibits a moderate emission quantum yield in water, the 6-aminobenzo[b]quinolizinium ion as well as N-phenyl-9-aminobenzo[b]quinolizinium derivatives are almost nonfluorescent. The low intrinsic fluorescence quantum yields of the

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23

TAGUCHI, M., and M. ALTARELLLI. "ORBITAL ORDERING IN LaMnO3: CLUSTER MODEL CALCULATION OF RESONANT X-RAY SCATTERING AND X-RAY ABSORPTION AT THE MnL2,3 EDGE." Surface Review and Letters 09, no. 02 (2002): 1167–71. http://dx.doi.org/10.1142/s0218625x02003469.

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We report theoretical results for resonant X-ray scattering (RXS) and linear dichroism (LD) in X-ray absorption spectra at the Mn L 2,3 edge in LaMnO 3, with special attention to the observation of orbital ordering. Calculations were performed on a ( MnO 6)10- cluster with D 4h symmetry, including the effect of intra-atomic multiplet coupling in the Mn ion. Anisotropy effects are also included, through the anisotropic Mn 3d– O 2p hybridization and crystal field parameters for Mn 3d states. The agreement between theory and experiment is good. Moreover, we show that the intensity of the peaks at

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Šmidlehner, Tamara, Ivo Piantanida, and Gennaro Pescitelli. "Polarization spectroscopy methods in the determination of interactions of small molecules with nucleic acids – tutorial." Beilstein Journal of Organic Chemistry 14 (January 8, 2018): 84–105. http://dx.doi.org/10.3762/bjoc.14.5.

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The structural characterization of non-covalent complexes between nucleic acids and small molecules (ligands) is of a paramount significance to bioorganic research. Highly informative methods about nucleic acid/ligand complexes such as single crystal X-ray diffraction or NMR spectroscopy cannot be performed under biologically compatible conditions and are extensively time consuming. Therefore, in search for faster methods which can be applied to conditions that are at least similar to the naturally occurring ones, a set of polarization spectroscopy methods has shown highly promising results. E

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Shindo, Yohji, Motohide Nishio, and Shiro Maeda. "Problems of CD spectrometers (V): Can we measure CD and LD simultaneously? Comments on differential polarization microscopy (CD and linear dichroism)." Biopolymers 30, no. 3-4 (1990): 405–13. http://dx.doi.org/10.1002/bip.360300318.

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26

Sung, Giwoong, Jong Heon Shin, Raeyeong Kim, et al. "Binding Geometry of Free Base and Mn(III)meso‐Tetrakis(N‐methylpyridium‐4‐yl)porphyrin to Various Duplex and Triplex DNAs." Bulletin of the Korean Chemical Society 36, no. 2 (2015): 650–58. http://dx.doi.org/10.1002/bkcs.10127.

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The binding mode of free base and Mn(III)meso‐tetrakis(N‐methylpyridium‐4‐yl)porphyrin (TMPyP and MnTMPyP) to various duplex and triplex synthetic polynucleotides was investigated by polarized light spectroscopy, specifically circular and linear dichroism (CD and LD) spectroscopy. Both TMPyP and MnTMPyP produced a similar positive CD spectrum in the Soret absorption region when bound to poly(dA)·poly(dT) duplex and poly(dA)·[poly(dT)]2 triplex. Considering that the third poly(dT) strand blocks the major groove, this result suggested that both porphyrins bound near the minor groove where the ax

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Garazdiuk, Marta. "Time since hemorrhages of traumatic and non-traumatic genesis into the substance of the human brain formation using distribution of linear dichroism fluctuations reconstruction." Forensic-medical examination, no. 1 (October 18, 2021): 25–35. http://dx.doi.org/10.24061/2707-8728.1.2021.4.

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For a forensic expert-practitioner, it is especially important to objectively diagnose and time since the formation of hemorrhage (TSFH) in the substance of the human brain (SHB) of traumatic and non-traumatic origin, as there are cases when the external examination of the corpse at the scene are absent, and at internal research find hemorrhages in a brain. In forensic practice, to verify the cause of death, physical-optical methods are successfully used, which are based on laser irradiation of biological tissues with subsequent mathematical and statistical processing of the obtained data. Pre

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Hárosi, F. I. "Cynomolgus and rhesus monkey visual pigments. Application of Fourier transform smoothing and statistical techniques to the determination of spectral parameters." Journal of General Physiology 89, no. 5 (1987): 717–43. http://dx.doi.org/10.1085/jgp.89.5.717.

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Microspectrophotometric measurements were performed on 217 photoreceptors from cynomolgus, Macaca fascicularis, and rhesus, M. mulatta, monkeys. The distributions of cell types, for rods and blue, green, and red cones were: 52, 12, 47, and 44, respectively, for the cynomolgus, and 22, 4, 13, and 13 for the rhesus. Visual cells were obtained fresh (unfixed), mounted in various media (some containing 11-cis-retinal), and then located visually under dim red (650 nm) illumination. Absolute absorbance (A), linear dichroism (LD), and bleaching difference (BD) absorbance spectra were recorded through

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Tatsuma, Tetsu, Seung Hyuk Lee, Yuki Oba, and Genki Horiuchi. "(Invited) Near Field Photocatalysis for Site-Selective Reactions By Using ZnO Nanoplates." ECS Meeting Abstracts MA2024-01, no. 35 (2024): 1963. http://dx.doi.org/10.1149/ma2024-01351963mtgabs.

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Nanofabrication is a technology for control of the morphology, orientation, and configuration of nanomaterials. When ordinary, propagating light is employed as a processing tool, subwavelength fabrication is difficult due to the diffraction limit. However, if optical near field, which is localized in a subwavelength region is used, nanofabrication beyond the diffraction limit is possible. We have demonstrated that subwavelength nanofabrication is possible by taking advantage of the optical near field. Since hot electron-hole pairs are generated at around the plasmonic resonance sites, the ener

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Kolev, Tsonko, Bojidarka Ivanova, and Rumyana Bakalska. "6-O-acetylcodeine and its hydrogensquarate: Linear-dichroic infrared (IR-LD) spectroscopy." Journal of Molecular Structure 794, no. 1-3 (2006): 138–41. http://dx.doi.org/10.1016/j.molstruc.2006.01.050.

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Koleva, Bojidarka, Tsonko Kolev, and Rumyana Bakalska. "Linear-dichroic infrared spectral (IR-LD) analysis of codeine and its derivatives." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 67, no. 1 (2007): 196–201. http://dx.doi.org/10.1016/j.saa.2006.07.002.

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Ivanova, Bojidarka. "Solid state linear-dichroic infrared (IR-LD) spectroscopic characterization of α-and β-glycine polymorphs". Open Chemistry 4, № 1 (2006): 111–17. http://dx.doi.org/10.1007/s11532-005-0008-7.

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AbstractIR-LD spectroscopic analysis using nematic liquid crystal suspension as a solid-state orientation technique and the reducing-difference procedure for polarized spectra interpretation are applied to the α-and β-polymorphs of glycine. Both structural analysis and detailed IR band assignments were carried out.

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Kolev, Ts, B. B. Koleva, M. Emgenbroich, M. Spiteller, W. S. Sheldrick, and H. Mayer-Figge. "Crystal structure and linear-dichroic infrared (IR-LD) spectral analysis of N,N′-diethyl-4-vinylbenzamidinium squarate." Structural Chemistry 17, no. 6 (2006): 631–37. http://dx.doi.org/10.1007/s11224-006-9110-5.

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Ivanova, Bojidarka B. "Aromatic dipeptides and their salts—Solid-state linear-dichroic infrared (IR-LD) spectral analysis and ab initio calculations." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 70, no. 2 (2008): 324–31. http://dx.doi.org/10.1016/j.saa.2007.09.005.

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Zareva, Sonya. "Solid-state linear-dichroic infrared (IR-LD) spectroscopic and theoretical characterization of 2-[(2-ethoxy-3,4-dioxocyclobut-1-en-yl)amino]propanamide." Open Chemistry 4, no. 4 (2006): 695–707. http://dx.doi.org/10.2478/s11532-006-0034-0.

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Abstract2-[(2-Ethoxy-3,4-dioxocyclobut-1-en-yl)amino]propanamide (N-alaninamidoamide of squaric acid ethyl ester) has been characterized structurally and spectroscopically by ab initio calculations and IR-LD spectroscopy of oriented crystals suspended in a nematic liquid crystal. The results are compared with single crystal X-ray structures illustrating the possibilities of this experimental approach to obtaining structural information as well as assigning IR bands.

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Ivanova, Bojidarka B., and Liliya I. Pindeva. "Protonation of benzimidazoles and 1,2,3-benzotriazoles – Solid-state linear dichroic infrared (IR-LD) spectral analysis and ab initio calculations." Journal of Molecular Structure 797, no. 1-3 (2006): 144–53. http://dx.doi.org/10.1016/j.molstruc.2006.03.049.

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Li, Gang, Zheng Chen, Hanlin Zhang, et al. "Abnormal Linear Dichroism Transition in Two-Dimensional PdPS." Nanoscale, 2022. http://dx.doi.org/10.1039/d2nr03587a.

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The linear dichroism (LD) conversion shows promising applications for wavelength-selective photodetection. However, polarity reversal behavior of LD materials alway occurs at a certain wavelength, which can only distinguish two wavelength...

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Gao, Yangjun, Chenhao Zhang, Liangjie Zhao, et al. "Van der Waals GeSe with Strain‐ and Gate‐Tunable Linear Dichroism for Wearable Electronics." Small, October 31, 2024. http://dx.doi.org/10.1002/smll.202406217.

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AbstractThe direct detection of light polarization poses a crucial challenge in the field of optoelectronics and photonics. Herein, the tunable linear dichroism (LD) in GeSe‐based polarized photodetectors is presented through electronic and structural asymmetry modulation, and demonstrate their application prospects in wearable electronics. An improvement in the dichroic ratio up to 34% is achieved under a gate voltage of 20 V, and the improvement reaches 44% by applying a tensile strain along the zigzag direction. Theoretical calculations reveal that the gate regulation of barrier height betw

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Jones, Nykola C., Alison Rodger, and Søren V. Hoffmann. "Advantages of a synchrotron light source for fluorescence‐detected linear dichroism." Chirality 36, no. 4 (2024). http://dx.doi.org/10.1002/chir.23667.

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AbstractFluorescence‐detected linear dichroism (FD‐LD) enables one to collect linear dichroism spectra for oriented fluorophores in the presence of other absorbing species and light scattering. The experiment proceeds by scanning the excitation wavelength and using a filter to collect only emitted photons from the fluorophore. Thus, it has the potential to give data with enhanced selectivity and quality. By using a synchrotron radiation light source and fluorescence‐detection, we show data for a range of fluorophores in different orienting environments. Film and flow‐oriented FD‐LD spectra wer

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Little, Haydn A., Aysha Ali, Jake G. Carter, Matthew R. Hicks, Timothy R. Dafforn, and James H. R. Tucker. "A plug-and-play aptamer diagnostic platform based on linear dichroism spectroscopy." Frontiers in Chemistry 11 (May 9, 2023). http://dx.doi.org/10.3389/fchem.2023.1040873.

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A plug-and-play sandwich assay platform for the aptamer-based detection of molecular targets using linear dichroism (LD) spectroscopy as a read-out method has been demonstrated. A 21-mer DNA strand comprising the plug-and-play linker was bioconjugated onto the backbone of the filamentous bacteriophage M13, which gives a strong LD signal due to its ready alignment in linear flow. Extended DNA strands containing aptamer sequences that bind the protein thrombin, TBA and HD22, were then bound to the plug-and-play linker strand via complementary base pairing to generate aptamer-functionalised M13 b

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Gust, Domenic, Mirko Scholz, Vivien Schumacher, et al. "Annealing temperature-dependent induced supramolecular chiroptical response of copolymer thin films studied by pump-modulated transient circular dichroism spectroscopy." Scientific Reports 14, no. 1 (2024). http://dx.doi.org/10.1038/s41598-024-63126-4.

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AbstractCopolymer thin films showing induced supramolecular chirality are of considerable interest for optoelectronic applications such as organic light-emitting diodes. Here, we introduce a new helicene-like chiral additive with two octyloxy substituents which displays excellent chiral induction properties in an achiral polyfluorene copolymer, leading to a circular dichroism (CD) response of up to 10,000 mdeg. This chiral inducer also displays very good thermal stability, which enables us to perform an extended study on the induced chiroptical properties of the cholesteric copolymer thin film

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Huang, Po‐Ling, Yu‐Lung Lo, Yu‐Ren Chen, and Chih‐Yi Liu. "Mueller matrix polarimetry approach for noninvasive glucose sensing with absorbance and anisotropic parameters on fingertips." Journal of Biophotonics, July 2, 2024. http://dx.doi.org/10.1002/jbio.202400052.

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AbstractA Mueller matrix polarimetry system at 532 nm wavelength is developed for noninvasive glucose sensing in turbid media such as human's fingertip. The system extracts mean absorbance and anisotropic properties, demonstrated numerically and experimentally with phantom glucose samples. It is found that mean absorbance (), depolarization index (Δ), and linear dichroism (LD) show linear variation with glucose concentration 100–500 mg/dL. In addition, LightTools simulations indicate proportional scaling of scattering effects with , Δ, and LD. Real‐world tests on fingertip show a strong correl

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Wei, Limei, Qing Zhang, Shilei Wang, et al. "Linear Dichroism Conversion in Quasi‐1D Weyl Semimetal (TaSe₄)₂I Crystal with Giant Optical Anisotropy." Advanced Optical Materials, June 21, 2024. http://dx.doi.org/10.1002/adom.202401066.

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AbstractThe LD conversion offers great potential in providing an additional degree of freedom that may be beneficial to novel polarization‐wavelength‐selective detectors and optical switching. However, conventional crystals with optical anisotropy typically show unidirectional LD over a broad wavelength range and the materials with LD conversion behavior remain scarce. Here, by combining angle‐resolved polarized optical absorption measurements and theoretical calculations, this study demonstrates that quasi‐1D Weyl semimetal (TaSe4)2I single crystal shows unique LD conversion phenomenon at the

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Qureshi, Ubaid Ur Rahman, Shahid Basir, Fatma Mallek, and Habib Hamam. "Polarization and incident angle independent multifunctional tunable terahertz metasurface based on graphene." Scientific Reports 14, no. 1 (2024). http://dx.doi.org/10.1038/s41598-024-55676-4.

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AbstractMotivated by the imperative demand for design integration and miniaturization within the terahertz (THz) spectrum, this study presents an innovative solution to the challenges associated with singular functionality, limited application scope, and intricate structures prevalent in conventional metasurfaces. The proposed multifunctional tunable metasurface leverages a hybridized grapheme–metal structure, addressing critical limitations in existing designs. Comprising three distinct layers, namely a graphene–gold resonance layer, a Topas dielectric layer, and a bottom gold film reflective

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Maryam, Nejat Dehkordi, Lincoln Per, and Momtaz Hassan. "Comparative DNA Binding of Iron and Manganese Complexes by Spectroscopic and ITC Techniques and Antibacterial Activity." March 3, 2015. https://doi.org/10.5281/zenodo.1100312.

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Interaction of Schiff base complexes of Iron and Manganese: Iron [N, N’ Bis (5- (triphenyl phosphonium methyl) salicylidene) -1, 2 ethanediamine) chloride, [Fe Salen]Cl; Manganese [N, N’ Bis (5- (triphenyl phosphonium methyl) salicylidene) -1, 2 ethanediamine) acetate, were investigated by spectroscopic and isothermal titration calorimetry techniques (ITC). The absorbance spectra of complexes have shown hyper and hypochromism in the presence of DNA that is indication of interaction of complexes with DNA. The linear dichroism (LD) measurements confirmed the bending of DNA in the pre

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Liu, Jinxin, Miaomiao Zheng, Xiangzhe Zhang, et al. "Abnormal Linear Dichroism in Anisotropic Van der Waals Crystal CrOCl Revealed by Phase‐Dependent Polarized Raman Scattering." Advanced Optical Materials, March 14, 2024. http://dx.doi.org/10.1002/adom.202303190.

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AbstractWithin angle‐resolved polarized Raman spectroscopy (ARPRS) experiments, ensuring accurate configurations is crucial for obtaining reliable results, especially when dealing with anisotropic materials like CrOCl with anisotropic crystal structure and phonon properties. However, comprehensive understanding of phase‐dependent ARPRS and the calibration of phase angle on anisotropic phonon modes from a crystallographic perspective are still lacking. Herein, detailed investigation on phase‐dependent ARPRS and looked into the anisotropic photo‐phonon interaction in CrOCl through in situ ARPRS

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Liu, Jidong, Haibo Gan, Qiaoyan Hao, et al. "High‐performance visible and near‐infrared dual‐band photodetector based on anisotropic 2D NbS₃ with perpendicularly reversed polarization behaviors." InfoMat, October 2, 2024. http://dx.doi.org/10.1002/inf2.12625.

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AbstractDual‐band photodetectors exhibit considerable advantages in target discrimination and navigation compared to single‐band devices in complex circumstances. However, it remains a major challenge to overcome the limitations of traditional devices in terms of their integration with multiple light‐absorbing layers and complicated optical components. In this study, a visible and near‐infrared (NIR) dual‐band polarimetric photodetector with a single light‐absorbing layer is constructed by utilizing the distinctive conversion of linear dichroism (LD) polarity in two‐dimensional niobium trisulf

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Asgari, Somayyeh, and Tapio Fabritius. "Multi-band terahertz graphene-based anisotropic metamaterial absorber comprised of two circular split ring resonator arrays with two gaps and a connection rod." Optical and Quantum Electronics 57, no. 3 (2025). https://doi.org/10.1007/s11082-025-08110-6.

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Abstract A multi-band, graphene-based anisotropic metamaterial absorber designed to operate in the terahertz (THz) range features two circular split ring resonator arrays, each with two gaps and a connecting rod. This metamaterial is simulated using the frequency domain in CST Software. In addition, equivalent circuit models (ECMs) were derived to provide alternative approach to assess the characteristics of transverse electric (TE) and transverse magnetic (TM) modes using MATLAB code. The absorber is dynamically tunable, exhibiting a strong linear dichroism (LD) response of 98% within the 0.5

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Abhervé, Alexandre. "Experimental Evidence of the Molecular and Macroscopic Origins of Circular Dichroism in Chiral Metal‐Halide Networks." Advanced Optical Materials, May 25, 2024. http://dx.doi.org/10.1002/adom.202400381.

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AbstractClockwise or counter‐clockwise spin coating? In the current hot research topic of chiral metal‐halide semiconductors, several investigations have been undertaken in order to reveal their natural optical activity and have reported dissymmetry factors (gabs) for thin films of many hybrid compounds, usually without considering the macroscopic anisotropies inherent to solid‐state samples. Yet, CD in the solid state can be strongly modulated by the co‐existence of linear dichroism (LD) and linear birefringence (LB). Theoretical studies recently revealed the importance of such macroscopic in

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Asgari, Somayyeh, and Tapio Fabritius. "Graphene-based dual-functional chiral metamirror composed of complementary 90° rotated U-shaped resonator arrays and its equivalent circuit model." Scientific Reports 11, no. 1 (2021). http://dx.doi.org/10.1038/s41598-021-03457-8.

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AbstractAn equivalent circuit model (ECM) using a MATLAB code to analyze a tunable two-layered graphene-based chiral dual-function metamirror, is proposed in this work. The investigated metastructure is composed of complementary U-shaped graphene resonator arrays in the terahertz (THz) region. The ECM analysis could be used for any two-layered chiral metastructure for any frequencies, containing resonators with a thickness less than λ/50. The characteristics of the proposed tunable metamirror were analyzed numerically using the finite element method (FEM) in CST Software to verify the ECM anal

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