Advances in organic materials manufacturing have enabled the creation of electronic devices using solution‐processing techniques by employing soluble materials with high conductivity grade. In this exploratory study, the use of micro‐contact for poly(3,4‐ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) polymer ink deposition as high‐quality structured electrodes for organic field‐effect transistors (OFETs) in top‐contact geometry is demonstrated. The optimized OFET's solution‐processed fabrication is a promising strategy to be realized in the simple, cost‐effective roll‐to‐roll manufacturing processes. The electrical performance of the fabricated devices is comparable to transistors with gold electrodes prepared via vacuum deposition, and even exceeding the values of the charge carriers’ mobilities and featuring lower contact resistance (R_c), due to lower charge‐carrier injection barrier for carbon‐based organic electrodes. An addition of multi‐walled carbon nanotubes to the PEDOT:PSS decreases R_c even further, changing the work function for better energy alignment with semiconductor materials.

Colloidal BaTiO ₃ nanoparticles were synthesized, ligand exchanged with oxalic acid to make an ink, and their properties explored for piezoelectrics.

Understanding and controlling crystal growth mechanisms are essential for advancing materials development for optoelectronic applications. By controlling the morphology of the material, ultrathin transistors, flexible devices, surface-sensitive sensors, and the charge density wave phenomenon become realizable. Here, we report a solution-based synthesis of BaTiS3 nanostructures using tetrakis(dimethylamido)titanium, N,N'-diethylthiourea, and either barium bis(trimethylsilyl)amide (Ba[N(SiMe3)2]2) or barium iodide (BaI2) in oleylamine. The choice of barium precursor critically influences the morphology and crystal phase of the target material: Ba[N(SiMe3)2]2 yields ellipsoids that evolve into nanorods, while BaI2 produces two-dimensional (2D) nanoribbons, both in a nonperovskite hexagonal phase. Density functional theory calculations reveal that iodide ions selectively block specific crystal facets during growth, driving the formation of anisotropic nanoribbons. In situ mass spectrometry was employed to analyze gaseous species during synthesis, providing insights into the distinct growth mechanisms driven by precursor chemistry. X-ray diffraction patterns of the nanoribbons display sharp, periodic low 2θ reflections, indicative of superlattice formation, which can be tuned by varying ligand chain lengths, which enables formation of metamaterials and photonic crystals by precisely controlling the supercrystal periodicity. Establishing a robust synthetic method using widely available precursors and equipment is a key step forward in applying this material in advanced devices. This study highlights the role of precursor selection and surface chemistry in controlling the growth and assembly of BaTiS3 nanostructures, offering a pathway for designing advanced 2D materials for optoelectronic applications.