Formation of polypeptide-dye multilayers by electrostatic self-assembly technique

Self-assembled gold nanoparticle monolayers in sol–gel matrices: synthesis and gas sensing applications

“…16 Cooper et al used glass slides and the dip technique into a 2% (wt) solution of DAEPTMS in ethanol followed by annealing of samples at 110 C for 10 minutes. 9 The silanization method used in the present work was inspired by the work of Petri et al 17 and Barsotti et al 18 For the synthesis of CDA monolayers of NPs there are typically two approaches: one in which assembly is driven by ionic or weaker van der Waals attractions 19,[20][21][22] between surface ligands and NPs, and the other in which the formation of covalent bonds between them is the driving force. The binding of gold NP monolayers is driven by the electrostatic interactions between the carboxyl groups on the nanoparticles and the surface amine groups.…”

Exploiting Distinct Molecular Architectures of Ultrathin Films Made with Iron Phthalocyanine for Sensing

“…There is now a surge on their use for devices, for example, in photocopiers, solar cells, electrochromic displays, fuel cells, light-emitting diodes, transistors, optical limiters, in photodynamic therapy, [6][7][8][9][10][11][12][13][14][15][16][17][18] and sensors. 15,[19][20][21] In several of the possible applications, one important requirement is to produce materials in the form of thin films, which has been carried out for phthalocyanines with various methods, including Langmuir-Blodgett (LB), [22][23][24][25][26] electrostatic layer-bylayer (LbL), [27][28][29][30] physical vapor deposition (PVD), 31,32 and casting. 33 For sensing, in particular, it has been shown that film morphology and surface properties are relevant for the sensor performance.…”

Fluorescent Dyes Used in Polymer Carriers as Imaging Agents in Anticancer Therapy

“…This method enables the arrangement of "reactants" (e.g., optically active molecules with chemically reactive functional groups) at a molecular level to create theranostic tools with co-operative chemical sensitive and optical fragile properties. For example, the incorporation of a dye (e.g., anionic Congo Red) [328] into layers is affected by size, number of charge and spatial orientation of dye molecules, thus enables one to use it as a probe to obtain detailed information about local features such as a polarity and molecular mobility [329,330]. Further works in this area demonstrate that the formation of capsules with a polymer shell containing different segments can enhance drugs loading and modify the release of drugs by sequestering their molecules in both the core and shell compartments.…”