Growth of novel polythiophene and polyphenyl films via surface polymerization by ion-assisted deposition

Langmuir : the ACS Journal of Surfaces and Colloids
Sanja TepavcevicL Hanley

Abstract

Surface polymerization by ion-assisted deposition (SPIAD) is used here to grow novel polythiophene and polyphenyl thin films on a silicon surface by hyperthermal, mass-selected thiophene cations coincident with a thermal beam of alpha-terthiophene or p-terphenyl neutrals. X-ray photoelectron spectroscopy (XPS) observes a large enhancement in film growth for SPIAD compared with either thiophene ions or alpha-terthiophene exposure alone. Changes in S/Si and C/Si ratios from XPS, direct observation of higher polymerization products by mass spectrometry, characteristic vibrations in the Raman data, and enhanced stability in a vacuum all indicate that 200 eV SPIAD polythiophene films are most efficiently polymerized at a 1/150 ion/neutral ratio. Other ion/neutral ratios are less efficient at film growth, in the order 1/150 > 1/450 > 1/900 > direct ion deposition > 1/50. Changes in C/Si ratios and higher polymerization products indicate polymerization occurs in SPIAD polyphenyl films grown with a 1/100 ion/neutral ratio. Furthermore, thiophene ions are found to incorporate into some, but not all, of the polymerization products observed in mass spectrometry.

References

Nov 15, 1995·Physical Review. B, Condensed Matter·F BiscariniC Taliani
Apr 15, 1996·Physical Review. B, Condensed Matter·J W RabalaisW K Chu
Apr 11, 2001·Proceedings of the National Academy of Sciences of the United States of America·J J ThomasG Siuzdak
Apr 25, 2002·Annual Review of Physical Chemistry·Dennis C Jacobs
Feb 27, 2003·Journal of the American Chemical Society·Sanja TepavcevicLuke Hanley
Jun 6, 2003·Physical Review Letters·L CasalisG Scoles
Sep 11, 2003·Chemical Reviews·Konstantin P Gritsenko, Anatoly M Krasovsky

❮ Previous
Next ❯

Citations

Aug 24, 2012·Chemical Reviews·Jobin CyriacR G Cooks
Oct 15, 2005·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Jan van StamChristopher H Evans
Dec 14, 2005·Journal of Biomedical Materials Research. Part a·Manshui ZhouLuke Hanley
Apr 2, 2010·ACS Applied Materials & Interfaces·Adam M ZacharyLuke Hanley

❮ Previous
Next ❯

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.