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Long live(d) CsPbBr3 superlattices: colloidal atomic layer deposition for structural stability

Author(s): Lapointe V; Green PB; Chen AN; Buonsanti R; Majewski MB;

Superlattice formation afforded by metal halide perovskite nanocrystals has been a phenomenon of interest due to the high structural order induced in these self-assemblies, an order that is influenced by the surface chemistry and particle morphology of the starting building block material. In this work, we report on the formation of superlattices from alu ...

Article GUID: 38516096


Silica-coated LiYF4:Yb3+, Tm3+ upconverting nanoparticles are non-toxic and activate minor stress responses in mammalian cells

Author(s): Bietar K; Chu S; Mandl G; Zhang E; Chabaytah N; Sabelli R; Capobianco JA; Stochaj U;

Lanthanide-doped upconverting nanoparticles (UCNPs) are ideal candidates for use in biomedicine. The interaction of nanomaterials with biological systems determines whether they are suitable for use in living cells. In-depth knowledge of the nano-bio interactions is therefore a pre-requisite for the development of biomedical applications. The current stud ...

Article GUID: 38495986


Cooperative Sensitization Upconversion in Solution Dispersions of Co-Crystal Assemblies of Mononuclear Yb3+ and Eu3+ Complexes

Author(s): Sun G; Xie Y; Wang Y; Mandl GA; Maurizio SL; Zhang H; Ottenwaelder X; Capobianco JA; Sun L;

Lanthanide upconversion luminescence in nanoparticles has prompted continuous breakthroughs in information storage, temperature sensing, and biomedical applications, among others. Achieving upconversion luminescence at the molecular scale is still a critical challenge in modern chemistry. In this ...

Article GUID: 37040148


A biophysical study of tear film lipid layer model membranes

Author(s): Keramatnejad M; DeWolf C;

Tear film lipid layer (TFLL), the final layer of the human tear film is responsible for surface tension reduction while blinking, water evaporation retardation and maintaining the stability of the tear film. The study of the composition-structure-function relationship of TFLL is paramount, as a compromised structure of TFLL leads to the emergence of dry e ...

Article GUID: 36535341


Upconversion Luminescence through Cooperative and Energy-Transfer Mechanisms in Yb3+ -Metal-Organic Frameworks

Author(s): Xie Y; Sun G; Mandl GA; Maurizio SL; Chen J; Capobianco JA; Sun L;

Lanthanide-doped metal-organic frameworks (Ln-MOFs) have versatile luminescence properties, however it is challenging to achieve lanthanide-based upconversion luminescence in these materials. Here, 1,3,5-benzenetricarboxylic acid (BTC) and trivalent Yb3+ ions were used to generate crystalline Yb-BTC MOF 1D-microrods with upconversion luminescence under ne ...

Article GUID: 36437239


Investigating the reactive oxygen species production of Rose Bengal and Merocyanine 540-loaded radioluminescent nanoparticles

Author(s): Nsubuga A; Mandl GA; Capobianco JA;

Radioluminescent nanomaterials have garnered significant attention in the past decade due to their potential to perform X-ray mediated photodynamic therapy (X-PDT). Many of these materials are assumed to produce singlet oxygen based on a single assay. Herein we demonstrate that multiple assays are required to confidently determine whether singlet oxygen o ...

Article GUID: 36132856


On the photostability and luminescence of dye-sensitized upconverting nanoparticles using modified IR820 dyes

Author(s): Kaur M; Mandl GA; Maurizio SL; Tessitore G; Capobianco JA;

Dye sensitization is a promising route to enhance luminescence from lanthanide-doped upconverting nanoparticles (LnUCNPs) by improving the photon harvesting capability of LnUCNPs through the use of dye molecules, characterized by higher absorption coefficients. The literature does not fully address the poor photostability of NIR dyes, hindering solution-b ...

Article GUID: 36132705


Cytotoxicity and Genotoxicity of Azobenzene-Based Polymeric Nanocarriers for Phototriggered Drug Release and Biomedical Applications

Author(s): Londoño-Berrío M; Pérez-Buitrago S; Ortiz-Trujillo IC; Hoyos-Palacio LM; Orozco LY; López L; Zárate-Triviño DG; Capobianco JA; Mena-Giraldo P;

Drug nanoencapsulation increases the availability, pharmacokinetics, and concentration efficiency for therapeutic regimes. Azobenzene light-responsive molecules experience a hydrophobicity change from a polar to an apolar tendency by trans-cis photoisomerization upon UV irradiation. Polymeric pho ...

Article GUID: 35956634


Mechanisms of hypericin incorporation to explain the photooxidation outcomes in phospholipid biomembrane models

Author(s): Pereira LSA; Camacho SA; Almeida AM; Gonçalves RS; Caetano W; DeWolf C; Aoki PHB;

Cell membranes are the first barriers for drug binding and key for the action of photosensitizers (PS). Herein, we report on the incorporation of the PS hypericin into Langmuir monolayers of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC), 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) and 1,2-dioleoyl-sn-glycero-3-phospho-L-serine (DOPS), to represen ...

Article GUID: 35167859


Evaluation of Lanthanide-Doped Upconverting Nanoparticles for in Vitro and in Vivo Applications

Author(s): Samhadaneh DM; Mandl GA; Han Z; Mahjoob M; Weber SC; Tuznik M; Rudko DA; Capobianco JA; Stochaj U;

Because of their unique physicochemical properties, lanthanide-doped upconverting nanoparticles (Ln-UCNPs) have exceptional potential for biological applications. However, the use in biological systems is hampered by the limited understanding of their bionano interactions. Our multidisciplinary s ...

Article GUID: 35025434


Binary Cu2-xS Templates Direct the Formation of Quaternary Cu2ZnSnS4 (Kesterite, Wurtzite) Nanocrystals

Author(s): Yarur Villanueva F; Green PB; Qiu C; Ullah SR; Buenviaje K; Howe JY; Majewski MB; Wilson MWB;

Kesterite Cu2ZnSnS4 (k-CZTS) nanocrystals have received attention for their tunable optoelectronic properties, as well as the earth abundance of their constituent atoms. However, the phase-pure synthesis of these quaternary NCs is challenging due to their polymorphism, as well as the undesired fo ...

Article GUID: 34705409


Elucidating the mechanism of dual-fluorescence in carbon dots

Author(s): Macairan JR; de Medeiros TV; Gazzetto M; Yarur Villanueva F; Cannizzo A; Naccache R;

Carbon dots have garnered significant attention owing to their versatile and highly tunable optical properties; however, the origins and the underlying mechanism remains a subject of debate especially for dual fluorescent systems. Here, we have prepared carbon dots from glutathione and formamide precursors via a one-pot solvothermal synthesis. Steady stat ...

Article GUID: 34388574


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