Applications of the Porous Structures Obtained with the Breath-Figures Self-Assembly

Rodríguez‐Hernández, Juan; Bormashenko, Edward

doi:10.1007/978-3-030-51136-4_8

Cited by 5 publications

(5 citation statements)

References 61 publications

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“…These honeycomb micrometer-scaled polymer patterns were caused by the condensation of water droplets, which occurs when water vapor contacts a cold surface. This phenomenon is associated with the rapid evaporation of polymer solutions exposed to humidity [ 29 , 30 , 31 ]. The mechanism behind the formation of this honeycomb morphology is complex, involving thermodynamics and transport phenomena.…”

Section: Resultsmentioning

confidence: 99%

Bilayer Scaffolds of PLLA/PCL/CAB Ternary Blend Films and Curcumin-Incorporated PLGA Electrospun Nanofibers: The Effects of Polymer Compositions and Solvents on Morphology and Molecular Interactions

Tuanchai,

Iamphring,

Suttaphakdee

et al. 2024

Polymers

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Tissue engineering scaffolds have been dedicated to regenerating damaged tissue by serving as host biomaterials for cell adhesion, growth, differentiation, and proliferation to develop new tissue. In this work, the design and fabrication of a biodegradable bilayer scaffold consisting of a ternary PLLA/PCL/CAB blend film layer and a PLGA/curcumin (CC) electrospun fiber layer were studied and discussed in terms of surface morphology, tensile mechanical properties, and molecular interactions. Three different compositions of PLLA/PCL/CAB—60/15/25 (TBF1), 75/10/15 (TBF2), and 85/5/10 (TBF3)—were fabricated using the solvent casting method. The electrospun fibers of PLGA/CC were fabricated using chloroform (CF) and dimethylformamide (DMF) co-solvents in 50:50 and 60:40 volume ratios. Spherical patterns of varying sizes were observed on the surfaces of all blend films—TBF1 (17–21 µm) > TBF2 (5–9 µm) > TBF3 (1–5 µm)—caused by heterogeneous surfaces inducing bubble nucleation. The TBF1, TBF2, and TBF3 films showed tensile elongation at break values of approximately 170%, 94%, and 43%, respectively. The PLGA/CC electrospun fibers fabricated using 50:50 CF:DMF had diameters ranging from 100 to 400 nm, which were larger than those of the PLGA fibers (50–200 nm). In contrast, the PLGA/CC electrospun fibers fabricated using 60:40 CF:DMF had diameters mostly ranging from 200 to 700 nm, which were larger than those of PLGA fibers (200–500 nm). Molecular interactions via hydrogen bonding were observed between PLGA and CC. The surface morphology of the bilayer scaffold demonstrated adhesion between these two solid surfaces resembling “thread stitches” promoted by hydrophobic interactions, hydrogen bonding, and surface roughness.

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Section: Resultsmentioning

confidence: 99%

Bilayer Scaffolds of PLLA/PCL/CAB Ternary Blend Films and Curcumin-Incorporated PLGA Electrospun Nanofibers: The Effects of Polymer Compositions and Solvents on Morphology and Molecular Interactions

Tuanchai,

Iamphring,

Suttaphakdee

et al. 2024

Polymers

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“…[ 14,15 ] Furthermore, the potential for unwanted chemical reactions or phase transformations during solvent evaporation can obscure the process. [ 15,16 ] Despite the inherent complexities of these materials, the successful optoelectronic applications [ 17–20 ] of BFs to certain metal halides can be achieved by selecting appropriate solvents and modifying the process conditions.…”

Section: Introductionmentioning

confidence: 99%

Nature‐Inspired Halide Perovskite Breath Figures: Unleashing Enhanced Light‐Matter Interaction

Sarkar,

Maitra,

Hossain

et al. 2024

Advanced Optical Materials

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Halide perovskites offer a transformative potential for optoelectronics through tailoring the light‐matter interactions at the nanoscale. However, their susceptibility to environmental factors and limited compatibility with standard lithography techniques present significant challenges in precise nanopatterning. This work unveils a nature‐inspired breath figures (BFs) approach to pattern halide perovskites and enhancing their optoelectronic performance. The fabrication of BFs based on BiI3 allows for changes in nanopore size (ranging from 247 to 423 nm) and their distribution. Subsequently, these BiI3 BFs are transformed into hybrid halide MA3Bi2I9 BFs using a vapor‐assisted technique while retaining the nanoporous topology of the BiI3 structure. The resultant MA3Bi2I9 BFs show significantly enhanced light absorption compared to conventional thin films, attributed to the increased extinction and lower refractive index. The optoelectronic performance of the MA3Bi2I9 BFs is showcased by constructing a photodetector, which exhibits three orders of magnitude higher responsivity and detectivity, up to 1 AW−1 and 1.3 × 1012 Jones, respectively, outperforming the photodetectors based on solution‐processed A3B2I9 halide perovskite thin films. The BFs method provides flexibility in tuning nanoscale morphology, showcasing its potential in advancing lead‐free optoelectronics and paving the way for next‐generation optoelectronic devices.

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“…The facile nature of the classical BF approach lends itself to the passive coupling between the solvent evaporation and polymer curing that foresees both the initiation of condensation and termination of droplet growth with the curing of the pattern. 17–20 While offering opportunities to create varied self-assembled patterns, 21–23 this complex interconnection between the dynamic and non-equilibrium condensation/evaporation processes restricts the direct translation of the mechanistic knowledge of drop-wise condensation kinetics 24 towards predictive design of pore size and spacing in the classical evaporation-driven BF 21,25,26 approach. Substituting the passive evaporation-driven cooling of the polymer interface with external film cooling, we eliminate the coupling and enable in situ interrogation and modulation of the BF patterns through access to discrete intermediate designs within a single dynamic process.…”

Section: Introductionmentioning

confidence: 99%

Exploiting breath figure reversibility for in situ pattern modulation and hierarchical design

et al. 2023

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Applications of the Porous Structures Obtained with the Breath-Figures Self-Assembly

Cited by 5 publications

References 61 publications

Bilayer Scaffolds of PLLA/PCL/CAB Ternary Blend Films and Curcumin-Incorporated PLGA Electrospun Nanofibers: The Effects of Polymer Compositions and Solvents on Morphology and Molecular Interactions

Bilayer Scaffolds of PLLA/PCL/CAB Ternary Blend Films and Curcumin-Incorporated PLGA Electrospun Nanofibers: The Effects of Polymer Compositions and Solvents on Morphology and Molecular Interactions

Nature‐Inspired Halide Perovskite Breath Figures: Unleashing Enhanced Light‐Matter Interaction

Exploiting breath figure reversibility for in situ pattern modulation and hierarchical design

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