Keywords : CVD


PRAP-CVD: Up-scalable process for the deposition of PEDOT thin films

Bianca Rita Pistillo; Kevin Menguelti; Didier Arl; Renauld Leturcq; Damien Lenoble

Advanced Materials Letters, 2019, Volume 10, Issue 3, Pages 201-205
DOI: 10.5185/amlett.2019.2186

Plasma radicals assisted polymerization via CVD (PRAP-CVD) is emerging as an efficient alternative to conventional vapour based techniques to synthesise and deposit conjugated polymers. PRAP-CVD process is based on the concomitant but physically separated injection of low-energy oxidative radical initiators and vaporized monomer species into a reactor where temperature and pressure are finely controlled. Gas phase oxidative radicals are generated by a remote plasma chamber from a pure or diluted initiator. The low deposition temperature, below 100 °C, allows polymers to be directly synthesised on a wide range of substrates, including fabric, paper and plastic, without any thermal degradation and keeping a high degree of surface conformality. Additionally, the PRAP-CVD does not require post-deposition rinsing procedure which allows a wider range of application. PRAP-CVD PEDOT depositions have been carried out on different substrates with a transparency higher than 80% in the visible range. 

Deflection behavior of focused-ion-beam deposited carbon nanocantilever and overhung structures

Prashant K Sarswat; Madhusudan Jagannathan

Advanced Materials Letters, 2017, Volume 8, Issue 4, Pages 324-330
DOI: 10.5185/amlett.2017.6889

Elastic properties of nanostructures are crucial for the adequate design and long term use of nano/micro-electro-mechanical system (NEMS/MEMS) as well as their utility in nanoindentation. Carbon nanostructures were fabricated by focused ion beam (FIB) assisted deposition and milling using Naphthalene (C10H8) as a precursor gas. Cantilevers of size 3-10 µm were fabricated and their elastic properties were monitored. An end point load was applied by successive deposition of Pt or carbon in a form of vertical column. Euler–Bernoulli beam theory was applied to examine the mechanical properties of the cantilever. It has been observed that expected deflection of the carbon nano-cantilever is significantly different compared to most of the reported micro or nano-sized carbon or diamond structures. Initial investigation of such a discrepancy suggests that Ga implantation and presence of core-shell type structure are the main causes of altered mechanical properties. 

Sorption Of Divalent Metal Ions From Aqueous Solution By Oxidized carbon Nanotubes And Nanocages: A Review

Saksham Srivastava

Advanced Materials Letters, 2013, Volume 4, Issue 1, Pages 2-8
DOI: 10.5185/amlett.2013.icnano.110

This is a scientific review defining the technical feasibility of surface oxidized carbon nanotubes (CNTs) for sorption of divalent metal ions (Cd 2+ , Cu 2+ , Ni 2+ , Pb 2+ , Zn 2+ ) from aqueous solution. By conducting the detailed literature review it was found that the adsorption capacities of CNTs remarkably increased after conducting their surface oxidization with NaOCl, HNO3 and KMnO4 solutions. Unlike many microporous adsorbents, CNTs possess ï‌