by Seong Soo Choi  , Byung Seong Bae  , Yong Min Lee  , Myoung JIn Park  , Hyun Tae Kim  , Soo Bong Choi  and Kyoung JIn Kim

Received: 22 December 2020;  Published: 05 February 2021;  doi: 10.21926/rpm.2101004

We fabricated various nanoaperture plasmonic platforms for single-molecule detection. We fabricated nanoapertures like nanopores on a pyramid and nanoslits on an Au flat membrane using a Ga ion focused ion beam drilling technique, followed by irradiating with a high energy electron beam, dependent on the electron beam current density to obtain nanoapertures with a few nanometer sizes (circular nanopore, nanoslit pores). We examined their optical characteristics with varying aperture sizes and sample thicknesses. We [...]

by Ahalapitiya H Jayatissa  , Bodhi R Manu  , Adam M Schroeder  and Omer Ahmed

Received: 13 August 2020;  Published: 22 January 2021;  doi: 10.21926/rpm.2101003

The tribological properties of ZnO thin film coated on an aluminium work piece by RF magnetron sputtering were studied as a function of deposition power, substrate coating temperature, heat treatment and rotation speed. The variation in the coefficient of friction of ZnO films produced under various levels of coating parameters and conditions were experimentally determined using a pin-on-disk tribometer. The results showed that with change in deposition conditions and heat treatment, there are significant microstru [...]

by Mohammed Faruqi  , Zachary Scott Dean  , Francisco Aguiniga  and Breanna Bailey

Received: 15 November 2020;  Published: 15 January 2021;  doi: 10.21926/rpm.2101002

Prestressed concrete members have gained popularity as an efficient and effective way of designing a structural member with the best engineering and material properties. The method of prestressing a structural concrete member has the capability of controlling increased service loads with less depth over longer spans. However, deflections from over-loading or loading over time give a disadvantage to the common steel reinforced concrete members by the effect of corrosion as the structural concrete develop cracks. To [...]

by Recent Progress in Materials Editorial Office

Received: 07 January 2021;  Published: 07 January 2021;  doi: 10.21926/rpm.2101001

The editors of Recent Progress in Materials would like to express their sincere gratitude to the following reviewers for assessing manuscripts in 2020. We greatly appreciate the contribution of expert reviewers, which is crucial to the journal's editorial process. We aim to recognize reviewer contributions through several mechanisms, of which the annual publication of reviewer names is one. Reviewers receive a voucher entitling them to a discount on their next LIDSEN publication and can download a certificate of re [...]

by Ki-Won Jeong  , Jeong Chan Kim  and In-Sung Yeo

Received: 13 August 2020;  Published: 17 December 2020;  doi: 10.21926/rpm.2004024

A connection structure using both a screw and friction is advantageous to secure an abutment to an implant. Understanding the biomechanics of the implant-abutment connection is necessary for the long-term clinical survival of a dental implant with decreased complications. The internal conical friction connection structure and micro-threads have shown favorable biological hard tissue response with exceptional structural features. The internal conical connection structure maintains the soft tissue seal and the margin [...]

by Hassan-Ali Hakemi

Received: 11 October 2020;  Published: 08 December 2020;  doi: 10.21926/rpm.2004023

In this work, the experimental data on flexible PDLC films at the industrial scale and the effect of cure temperature (Tc) on the morphology and electro-optical properties of a UV-cured PDLC system via polymer-induced phase separation (PIPS) method were studied. Under constant UV radiation intebsity and thickness, the morphological parameters such as dimension, number density, and volume fraction of the phase-separated liquid crystal droplets as well as the optical transmissions and switching voltages as a function [...]

by Maathar Al Qasimi  , Dhafer Manna Al Zulayqa  and Mostafa Seifan

Received: 29 July 2020;  Published: 23 October 2020;  doi: 10.21926/rpm.2004022

Additive manufacturing is a recent revolution in the construction field since cementitious materials became printable. This extrusion technique has enabled the construction of very complex geometry with a reduction in costs, time and labour interventions. This study aims to evaluate the possibility of reinforcing 3D printable cementitious composites with the use of nano and micro materials, particularly nano silica, micro silica and microfibrillated cellulose (MFC) which are known for their ability to enhance the f [...]

by Babak Jahani  , Xinnan Wang  and Amanda Brooks

Received: 26 June 2020;  Published: 08 September 2020;  doi: 10.21926/rpm.2003021

Bone tissue engineering (BTE) as a modern and more effective treatment for bone defects has recently received lots of attention. One of the pivotal parts of BTE is the “scaffold”, which functions as an indwelling carrier of cells and additives, as well as, providing a foundation for cell growth and eventually forming new, native-like bone. Up to now, many methods and materials have been employed to manufacture bone scaffolds. This review focuses on providing both basic knowledge of BTE as well as possible methods o [...]

by Evelyne El Masri  and Tat-Hean Gan

Received: 28 May 2020;  Published: 27 August 2020;  doi: 10.21926/rpm.2003020

Carbon fibre reinforced polymer (CFRP) systems as sheets or plates are commonly used to strengthen and retrofit damaged reinforced concrete beams. In general, the bond between the FRP element and concrete defines the effectiveness of the externally bonded FRP materials. In most cases, the interface bonding behaviour is usually tested via static loading conditions. In this paper, the bonding is verified under dynamic conditions. Wave propagation is modelled in delaminated CFRP strengthened reinforced concrete beam. [...]

by Kiril Fedorov  , Sonia Sheikh  , Alex Romaschin  and Michael Thompson

Received: 03 May 2020;  Published: 18 August 2020;  doi: 10.21926/rpm.2003019

During a variety of medical procedures such as renal dialysis, bypass surgery, and lung transplantation patient blood is exposed to the surface of a number of polymeric materials such as polycarbonate (PC), poly (vinyl chloride) (PVC) and polysulfone (PS) for a period up to several days. Such exposure may result in undesirable protein-material interactions that can potentially trigger deleterious biological processes including thrombosis, which may be responsible for other complications such as cognitive disability [...]