Model Polyhedral Oligomeric Silsesquioxane Thin Films for Coating Applications

2002 ◽  
Author(s):  
Brent Viers ◽  
Shawn Phillips ◽  
Timothy Haddad ◽  
Alan Esker ◽  
Joe Polidan
Keyword(s):  
Thin Films ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Oligomeric Silsesquioxane

Enhanced Photoluminescence Properties of Polyhedral Oligomeric Silsesquioxane-Based Hybrid Phosphors for Anti-Counterfeiting and Flexible Composite Applications

2021 ◽  
Vol 13 (5) ◽  
pp. 748-754
Author(s):  
Jae Yong Jung ◽  
Soung Soo Yi
Keyword(s):  
Thin Films ◽  
Colloidal Solution ◽  
Uv Light ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Photoluminescence Properties ◽  
Enhanced Photoluminescence ◽  
Pyridinedicarboxylic Acid ◽  
Hybrid Complex ◽  
Plastic Card ◽  
Oligomeric Silsesquioxane

We have described a novel organic-inorganic hybrid polyhedral oligomeric silsesquioxane (POSS) type monomer ligand 2,6-pyridinediamine-bis-propanylheptaisobutyl POSS (PDC-POSS) and synthesized it using rare-earth (RE = Eu3+, Tb3+) doped hybrid complex PDC-POSS phosphors. The PDC-POSS precursor was prepared by (3-aminopropyl) heptaisobutyl POSS, 2,6-pyridinedicarboxylic acid chloride (PDC), and then coordinated with RE3+ using europium and terbium nitrate regents to yield PDC-POSS:RE3+ phosphors. Under UV light (A = 285 nm) excitation, photoluminescence (PL) spectra of Eu3+-doped PDC-POSS were detected at 591, 615, 650, and 693 and those of Tb3+-doped PDC-POSS were monitored at 488, 544, 584, 619, and 647 nm. The thin films with good transmittance were deposited from aqueous colloidal solution of hybrid phosphors on bank notes, plastic card substrates, and cotton fibers to demonstrate the transparency of phosphor thin films, which are feasible for use in anti-counterfeiting applications, which require concealment and identification by the naked eye. In addition, a polymer composite with good flexibility that can be applied to LED chips and display was produced. Finally, it was suggested that PDC-POSS:RE3+ phosphors can be used in various applications.

Structure and Dewetting Behavior of Polyhedral Oligomeric Silsesquioxane-Filled Polystyrene Thin Films

Langmuir ◽  
2007 ◽  
Vol 23 (2) ◽  
pp. 902-907 ◽  
Author(s):  
Nao Hosaka ◽  
Naoya Torikai ◽  
Hideyuki Otsuka ◽  
Atsushi Takahara
Keyword(s):  
Thin Films ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Oligomeric Silsesquioxane

Studies of dodecaphenyl polyhedral oligomeric silsesquioxane thin films on Si(100) wafers

2014 ◽  
Vol 1065-1066 ◽  
pp. 248-253 ◽  
Author(s):  
Bartosz Handke ◽  
Łukasz Klita ◽  
Jacek Nizioł ◽  
Witold Jastrzębski ◽  
Anna Adamczyk
Keyword(s):  
Thin Films ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Oligomeric Silsesquioxane

scholarly journals High-temperature molecular screening of hybrid polyOAPS-imide networks based on octa(aminophenyl)silsesquioxane for increased thermomechanical resistance

2021 ◽  
Author(s):  
Sylvie Neyertz ◽  
Saman Salimi ◽  
Farzaneh Radmanesh ◽  
Nieck E. Benes ◽  
David Brown
Keyword(s):  
Thin Films ◽  
High Temperature ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Interfacial Polycondensation ◽  
Molecular Screening ◽  
New Family ◽  
Oligomeric Silsesquioxane ◽  
Covalently Bound

A new family of hybrid hyper-cross-linked thin films based on inorganic polyhedral oligomeric silsesquioxane (POSS) cages covalently bound with short organic imides has recently been developed using interfacial polycondensation followed...

Ultra-Low-k Thin Films of Polyhedral Oligomeric Silsesquioxane/Epoxy Nanocomposites via Covalent Layer-by-Layer Assembly

2009 ◽  
Vol 9 (3) ◽  
pp. 1839-1843 ◽  
Author(s):  
Ying-Ling Liu ◽  
Chuan-Shun Liu ◽  
Wei-Hong Chen ◽  
Shi-Yi Chen ◽  
Ko-Shung Wang ◽  
...  
Keyword(s):  
Thin Films ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Layer By Layer ◽  
Epoxy Nanocomposites ◽  
Layer By Layer Assembly ◽  
Oligomeric Silsesquioxane ◽  
Layer Assembly

Polyhedral Oligomeric Silsesquioxane /Platelets Rich Plasma/Gelrite-Based Hydrogel Scaffold for Bone Tissue Engineering

2020 ◽  
Vol 26 (26) ◽  
pp. 3147-3160
Author(s):  
Saeedeh Ahmadipour ◽  
Jaleh Varshosaz ◽  
Batool Hashemibeni ◽  
Leila Safaeian ◽  
Maziar Manshaei
Keyword(s):  
Bone Fractures ◽  
Compressive Strain ◽  
Gelation Time ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Local Drug Delivery ◽  
Gelling Agent ◽  
Control Group ◽  
Hydrogel Scaffold ◽  
Alizarin Red ◽  
Oligomeric Silsesquioxane

Background: Polyhedral oligomeric silsesquioxane (POSS) is a monomer with silicon structure and an internal nanometric cage. Objective: The purpose of this study was to provide an injectable hydrogel that could be easily located in open or closed bone fractures and injuries, and also to reduce the possible risks of infections caused by bone graft either as an allograft or an autograft. Methods: Various formulations of temperature sensitive hydrogels containing hydroxyapatite, Gelrite, POSS and platelets rich plasma (PRP), such as the co-gelling agent and cell growth enhancer, were prepared. The hydrogels were characterized for their injectability, gelation time, phase transition temperature and viscosity. Other physical properties of the optimized formulation including compressive stress, compressive strain and Young’s modulus as mechanical properties, as well as storage and loss modulus, swelling ratio, biodegradation behavior and cell toxicity as rheometrical parameters were studied on human osteoblast MG-63 cells. Alizarin red tests were conducted to study the qualitative and quantitative osteogenic capability of the designed scaffold, and the cell adhesion to the scaffold was visualized by scanning electron microscopy. Results: The results demonstrated that the hydrogel scaffold mechanical force and injectability were 3.34±0.44 Mpa and 12.57 N, respectively. Moreover, the scaffold showed higher calcium granules production in alizarin red staining compared to the control group. The proliferation of the cells in G4.5H1P0.03PRP10 formulation was significantly higher than in other formulations (p<0.05). Conclusion: The optimized Gelrite/Hydroxyapatite/POSS/PRP hydrogel scaffold has useful impacts on osteoblasts activity, and may be beneficial for local drug delivery in complications including a break or bone loss.

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