Marek Samoć
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View article: Efficient Quenching of Two-Photon Absorption Induced Photoluminescence in Carbon Nanodots for Fe<sup>3+</sup> Ion Detection
Efficient Quenching of Two-Photon Absorption Induced Photoluminescence in Carbon Nanodots for Fe<sup>3+</sup> Ion Detection Open
This study reports on the linear and nonlinear optical (NLO) properties of water-dispersed carbon nanodots (CNDs) fabricated via a rapid one-step hydrothermal microwave-assisted technique. The CNDs exhibit two-photon excited luminescence, …
View article: Strong Enhancement of Two-Photon Absorption and Emergence of Unusual Extinction Saturation in Silver Sulfide Quantum Dots Integrated with Gold and Silica Nanostructures
Strong Enhancement of Two-Photon Absorption and Emergence of Unusual Extinction Saturation in Silver Sulfide Quantum Dots Integrated with Gold and Silica Nanostructures Open
Hybrid nanosystems, such as those combining plasmonic, dielectric, and quantum-confined nanostructures, have long been of interest for enhancing and tailoring diverse light-matter interactions. Here, we present a series of hybrid nanomater…
View article: Enhanced nonlinear optical properties of Au<sub>25</sub> nanocluster oligomers linked by bidentate dithiol
Enhanced nonlinear optical properties of Au<sub>25</sub> nanocluster oligomers linked by bidentate dithiol Open
Oligomerization of atomically-precise clusters leads to enhancements of their nonlinear optical performance (9000 GM for monomers, 66 000 GM for trimers).
View article: Two-photon excited luminescence of sulfur quantum dots for heavy metal ion detection
Two-photon excited luminescence of sulfur quantum dots for heavy metal ion detection Open
Spectrally-resolved third-order nonlinear optical properties of water-dispersed sulfur quantum dots were used as combined one- and two-photon active sensor for heavy metal ions detection.
View article: Third-Order Nonlinear Optical Properties of Aqueous Silver Sulfide Quantum Dots
Third-Order Nonlinear Optical Properties of Aqueous Silver Sulfide Quantum Dots Open
Wide spectral wavelength range (500-1600 nm) measurements of nonlinear optical properties of silver sulfide (Ag2S, with 2- or 3-mercaptopropionic acid, 2 or 3MPA ligands) quantum dots (QDs) in aqueous colloidal solutions were performed usi…
View article: Enhanced nonlinear optical properties of Au25 nanocluster oligomers linked by bidentate dithiol
Enhanced nonlinear optical properties of Au25 nanocluster oligomers linked by bidentate dithiol Open
Atomically-precise gold nanoclusters covered with thiol ligands are attractive candidates for biophotonics applications. We show that their covalent linking may offer a pathway toward atomically-precise materials with enhanced nonlinear op…
View article: Strongly Emitting Folic Acid-Derived Carbon Nanodots for One- and Two-Photon Imaging of Lyotropic Myelin Figures
Strongly Emitting Folic Acid-Derived Carbon Nanodots for One- and Two-Photon Imaging of Lyotropic Myelin Figures Open
Non-invasive imaging of morphological changes in biologically relevant lipidic mesophases is essential for the understanding of membrane-mediated processes. However, its methodological aspects need to be further explored, with particular a…
View article: Enhanced biocidal activity of Pr<sup>3+</sup> doped yttrium silicates by Tm<sup>3+</sup> and Yb<sup>3+</sup> co-doping
Enhanced biocidal activity of Pr<sup>3+</sup> doped yttrium silicates by Tm<sup>3+</sup> and Yb<sup>3+</sup> co-doping Open
We present an improvement in optically-triggered antimicrobial treatment based on visible-to-ultraviolet upconversion emission in lanthanide-doped yttrium silicates.
View article: Linear and nonlinear absorption properties of hemicyanine dyes containing 5-(4H)-oxazolone as heterocyclic ring
Linear and nonlinear absorption properties of hemicyanine dyes containing 5-(4H)-oxazolone as heterocyclic ring Open
A series of dyes containing electron-donating (D) and electron-accepting (A) groups connected through a π-conjugated linker were designed and their linear and nonlinear absorption properties were studied. The dyes combined 1,3-oxazol-5(4H)…
View article: Non-toxic Polymeric Dots with the Strong Protein-Driven Enhancement of One- and Two-Photon Excited Emission for Sensitive and Non-destructive Albumin Sensing
Non-toxic Polymeric Dots with the Strong Protein-Driven Enhancement of One- and Two-Photon Excited Emission for Sensitive and Non-destructive Albumin Sensing Open
The need for efficient probing, sensing, and control of the bioactivity of biomolecules (e.g., albumins) has led to the engineering of new fluorescent albumins' markers fulfilling very specific chemical, physical, and biological requiremen…
View article: Linear and Nonlinear Optical Properties of Azobenzene Derivatives Modified with an (Amino)naphthalene Moiety
Linear and Nonlinear Optical Properties of Azobenzene Derivatives Modified with an (Amino)naphthalene Moiety Open
The design of two-photon absorbing azobenzene (AB) derivatives has received much attention; however, the two-photon absorption (2PA) properties of bis-conjugated azobenzene systems are relatively less explored. Here, we present the synthes…
View article: One- and Two-Photon Excited Autofluorescence of Lysozyme Amyloids
One- and Two-Photon Excited Autofluorescence of Lysozyme Amyloids Open
Autofluorescence properties of amyloid fibrils are of much interest but, to date, the attention has been given mostly to one-photon excited fluorescence (1PEF), while the two-photon excited fluorescence (2PEF) properties of amyloids are mu…
View article: Nonlinear Optical Absorption in Nanoscale Films Revealed through Ultrafast Acoustics
Nonlinear Optical Absorption in Nanoscale Films Revealed through Ultrafast Acoustics Open
Herein we describe a novel spinning pump-probe photoacoustic technique developed to study nonlinear absorption in thin films. As a test case, an organic polycrystalline thin film of quinacridone, a well-known pigment, with a thickness in t…
View article: Spectrally Resolved Nonlinear Optical Properties of Doped <i>Versus</i> Undoped Quasi-2D Semiconductor Nanocrystals: Copper and Silver Doping Provokes Strong Nonlinearity in Colloidal CdSe Nanoplatelets
Spectrally Resolved Nonlinear Optical Properties of Doped <i>Versus</i> Undoped Quasi-2D Semiconductor Nanocrystals: Copper and Silver Doping Provokes Strong Nonlinearity in Colloidal CdSe Nanoplatelets Open
Nonlinear optical processes are crucial for emerging applications including multiphoton-excited fluorescence microscopy and optical power limiting. Therefore, searching for materials of high multiphoton absorption cross sections is essenti…
View article: Pr<sup>3+</sup> doped NaYF<sub>4</sub> and LiYF<sub>4</sub> nanocrystals combining visible-to-UVC upconversion and NIR-to-NIR-II downconversion luminescence emissions for biomedical applications
Pr<sup>3+</sup> doped NaYF<sub>4</sub> and LiYF<sub>4</sub> nanocrystals combining visible-to-UVC upconversion and NIR-to-NIR-II downconversion luminescence emissions for biomedical applications Open
NaYF 4 and LiYF 4 nanoparticles co-doped with Pr 3+ and Yb 3+ are reported, manifesting 980 nm excited downconversion luminescence peaked at 1320 nm for NIR-II bioimaging and 447 nm excited upconversion luminescence at 275 nm for germicide…
View article: Two-photon absorption of 28-hetero-2,7-naphthiporphyrins: expanded carbaporphyrinoid macrocycles
Two-photon absorption of 28-hetero-2,7-naphthiporphyrins: expanded carbaporphyrinoid macrocycles Open
The one- and two-photon absorption (1PA and 2PA) properties of three expanded aceneporphyrinoids, 28-thia-, 28-selena- and 28-tellura-2,7-naphthiporphyrin, have been studied.
View article: Nonlinear optical absorption in nanoscale films revealed through ultrafast acoustics
Nonlinear optical absorption in nanoscale films revealed through ultrafast acoustics Open
Herein we describe a novel spinning pump-probe photoacoustic technique developed to study nonlinear absorption in thin films. As a test case, an organic polycrystalline thin film of quinacridone, a well-known pigment, with a thickness in t…
View article: Prospects for More Efficient Multi-Photon Absorption Photosensitizers Exhibiting Both Reactive Oxygen Species Generation and Luminescence
Prospects for More Efficient Multi-Photon Absorption Photosensitizers Exhibiting Both Reactive Oxygen Species Generation and Luminescence Open
The use of two-photon absorption (TPA) for such applications as microscopy, imaging, and photodynamic therapy (PDT) offers several advantages over the usual one-photon excitation. This creates a need for photosensitizers that exhibit both …
View article: Two-Photon Excited Polarization-Dependent Autofluorescence of Amyloids as a Label-Free Method of Fibril Organization Imaging
Two-Photon Excited Polarization-Dependent Autofluorescence of Amyloids as a Label-Free Method of Fibril Organization Imaging Open
Amyloids are broadly investigated protein misfolding products with characteristic β-sheet assemblies that have an important role in neurodegenerative diseases (e.g., Alzheimer's disease). While they are usually visualized by staining with …
View article: CCDC 2008784: Experimental Crystal Structure Determination
CCDC 2008784: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Nonlinear Optical Pigments. Two-Photon Absorption in Crosslinked Conjugated Polymers and Prospects for Remote Nonlinear Optical Thermometry
Nonlinear Optical Pigments. Two-Photon Absorption in Crosslinked Conjugated Polymers and Prospects for Remote Nonlinear Optical Thermometry Open
Nonlinear optical (NLO) pigments are compounds insoluble in solvents that exhibit phenomena related to nonlinear optical susceptibilities (χ(n) where n = 2,3,...), e.g., two-photon absorption (2PA) which is related to the imaginary part of…
View article: Hybrids of gold nanoparticles and oligo(p-phenyleneethynylene)s end-functionalized with alkynylruthenium groups: Outstanding two-photon absorption in the second biological window
Hybrids of gold nanoparticles and oligo(p-phenyleneethynylene)s end-functionalized with alkynylruthenium groups: Outstanding two-photon absorption in the second biological window Open
Oligo(p-phenyleneethynylene)s (OPEs) end-capped with (alkynyl)bis(diphosphine)ruthenium and thiol/thiolate groups stabilize ca. 2 nm diameter gold nanoparticles (AuNPs). The morphology, elemental composition and stability of the resultant …
View article: Postsynthetic Framework Contraction Enhances the Two-Photon Absorption Properties of Pillar-Layered Metal–Organic Frameworks
Postsynthetic Framework Contraction Enhances the Two-Photon Absorption Properties of Pillar-Layered Metal–Organic Frameworks Open
Aggregation-induced emission (AIE) dyes have been shown to be a potential ligand class for multiphoton absorbing metal–organic frameworks (MPA-MOFs); however, the influence of framework flexibility on the local ligand conformation and its …
View article: The Two-Photon Absorption Cross-Section Studies of CsPbX3 (X = I, Br, Cl) Nanocrystals
The Two-Photon Absorption Cross-Section Studies of CsPbX3 (X = I, Br, Cl) Nanocrystals Open
The CsPbX3 nanocrystals (NCs) with X = I, Br, Cl, or the mixture of Br:I and Br:Cl in a 1:1 ratio were synthesized and characterized by TEM, DLS, and XRD. Recrystallization of the small luminescent NCs in the metastable cubic phase into bi…