Arif Riza

Heriot-Watt University · School of Engineering and Physical Sciences

Effective output optimization in various industries requires precise monitoring of all processes and data involved. To facilitate further optimization, information must be easily accessible and traceable. While data traceability can be achieved using various technologies, some methods may have limitations, such as a lack of real-time monitoring or...

Fiber Bragg grating (FBG) based sensors require functional chemical coating for relative humidity (RH) sensing. However, the cladding of the fiber may impede the mechanical strain that is induced in the sensing region of the FBG. This study focuses on the humidity sensing performance of FBGs etched with several different diameters. Silica-based uni...

Zinc oxide (ZnO) possesses unique nanostructures. Most ZnO nanostructures have yet seen its use as coating for fiber Bragg grating (FBG) sensors. The properties of zinc oxide nanostructure can be greatly influenced by different additives added with the precursor. This study reports on the influence of different concentration of hexamethylenetetrami...

Hygroscopic materials are often explored and utilized as a sensing element in various devices for many different industries. Optical based sensors operate in conjunction with materials that are reactive to the parametric changes in the environment. Modified synthesis process allows formation of unique and novel nanostructures that can potentially b...

A humidity sensing material is usually hygroscopic in nature and can allow sites for water adsorption. The hygroscopic material is usually coated in various devices for sensing enhancement. A zinc oxide additive‐enhanced nanostructure (ZnO‐HMT) was coated repeatedly on fiber Bragg grating (FBG) have been fabricated. The sensing material was synthes...

The hygroscopic properties of a material allow water retention and release of water vapor from surface of a nanostructure. Most nanostructure exhibit morphological change due to swelling or directional expansion upon water intake. The study focuses on characterizing the hygroscopic properties of additive enhanced zinc oxide via weighing method and...

Materials that have hygroscopic capabilities are potent sensing elements for humidity sensors. The hygroscopic behaviour of zinc oxide (ZnO) with modified nanostructure was synthesized and characterized. Heterocyclic additive was added on ZnO to improve its hygroscopic capability for humidity sensitization. ZnO capability of water molecule adsorpti...

Sensor-based optical fibers require thinner cladding for enhanced interaction between the evanescence wave and the environment. Fiber Bragg grated fiber sensors relying on an axial strain require chemical etching to weaken the fiber allowing more sensitivity in terms of strain. Ease of sensor multiplexing can be achieved through etching the mid-sec...

This paper presents a humidity sensing based on perovskites nanostructured thin film for improved sensitivity and optical performance. The nickel-doped zinc thin oxide (NZTO) perovskites thin film was used as a sensing material for the humidity sensing application. The NZTO was deposited on borosilicate glass substrates via aerosol-assisted chemica...

Sensors play a large role in monitoring and ensuring that environmental parameters satisfy industrial requirements. They offer crucial safety measures in the early detection of hazards. Conventional electrical sensors possess several drawbacks that hinder their use in environmental sensing. Research has explored and optimized optical-based sensors...

Perovskites are materials that have many potential applications, such as humidity sensors, transparent conductive oxides, photocatalysts and capacitors. Strontium stannate (SrSnO 3 ) is a perovskite semi-conductor material with a wide band gap. Several synthesis methods are commonly used to form SrSnO 3 , including solid-state reaction (SSR), sol-g...

This study focuses on the properties of ZTO which have been deposited by a low-cost method namely aerosol assisted chemical vapor deposition (AACVD). The precursors used in this method were zinc acetate dihidrate and tin chloride dihydrate for ZTO thin film deposition. Both precursors were mixed and stirred until fully dissolved before deposition....

Tin (IV) oxide (SnO2) is a stable semiconductor and has been used in a wide range of applications. In this work, aerosol-assisted chemical vapor deposition (AACVD) technique is employed to deposit SnO2 thin film with different layer thicknesses by controlling the deposition time. The morphological and optical properties of SnO2 layer are investigat...

Perovskite structured materials are gaining recognisant due to some of its favorable properties. A perovskite can be made into a transparent conductive oxides (TCO) and with doped materials that reduce its resistivity while maintaining high transparency it. Perovskites can be synthesized in many methods, which are solid state reaction, sol-gel, pec...

Transparent conductive oxides (TCOs) have been used in a wide variety of applications as sensors and electronic displays and for solar harvesting for the past decades. TCOs are made of conductive materials such as metals. Many studies have been conducted to improve the properties of materials for TCOs. The properties that make a TCO effective are h...