Chee Kiang Ivan Tan
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View article: Bioaerosol Inactivation by a Cold Plasma Ionizer Coupled with an Electrostatic Precipitator
Bioaerosol Inactivation by a Cold Plasma Ionizer Coupled with an Electrostatic Precipitator Open
Despite best efforts in air purification, airborne infectious diseases will continue to spread due to the continuous emission of bioaerosols by the host/infected person. Hence, a shift in focus from air purification to bioaerosol inactivat…
View article: Ultrahigh electromechanical response from competing ferroic orders
Ultrahigh electromechanical response from competing ferroic orders Open
Materials with electromechanical coupling are essential for transducers and acoustic devices as reversible converters between mechanical and electrical energy 1–6 . High electromechanical responses are typically found in materials with str…
View article: Bioaerosol Disinfection by a Cold Plasma Ionizer Coupled with an Electrostatic Precipitator
Bioaerosol Disinfection by a Cold Plasma Ionizer Coupled with an Electrostatic Precipitator Open
Despite the best efforts in air-purification, airborne infectious diseases do and will continue to spread due to continuous emission of bioaerosols by the host/infected person. To tackle the rapid spread of airborne infectious diseases, a …
View article: Reply to: Mobility overestimation in MoS$_2$ transistors due to invasive voltage probes
Reply to: Mobility overestimation in MoS$_2$ transistors due to invasive voltage probes Open
In this reply, we include new experimental results and verify that the observed non-linearity in rippled-MoS$_2$ (leading to mobility kink) is an intrinsic property of a disordered system, rather than contact effects (invasive probes) or o…
View article: Sb Alloying for Engineering High‐Thermoelectric <i>zT</i> of CuGaTe<sub>2</sub>
Sb Alloying for Engineering High‐Thermoelectric <i>zT</i> of CuGaTe<sub>2</sub> Open
Decades of studies on thermoelectric materials have enabled the design of high‐performance materials based on basic materials properties, such as bandgap engineering. In general, bandgap energies correspond to the temperature at which the …
View article: Publisher's Note: “Emerging multi-frequency surface strain force microscopy” [J. Appl. Phys. 133, 040901 (2023)]
Publisher's Note: “Emerging multi-frequency surface strain force microscopy” [J. Appl. Phys. 133, 040901 (2023)] Open
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View article: Laser-treatment-induced surface integrity modifications of stainless steel
Laser-treatment-induced surface integrity modifications of stainless steel Open
Scanning of a high-power laser beam on the surface of martensitic stainless steel (SS420) has been studied, addressing the effect of scanning rate V on integrity modifications in the near-surface regions. Structural, compositional, and cry…
View article: Emerging multi-frequency surface strain force microscopy
Emerging multi-frequency surface strain force microscopy Open
During the past decade, Scanning Probe Microscopy (SPM) based surface strain detection techniques have been extensively used in the characterization of functional materials, structures, and devices. Here, we refer these techniques as Surfa…
View article: Laser-induced in-plane curving of ripples on biomedical stainless steel and their relationship to biological functions
Laser-induced in-plane curving of ripples on biomedical stainless steel and their relationship to biological functions Open
Laser-induced periodic surface structures (LIPSS) on biomedical stainless steel in air and water were systematically studied. The LIPSS exhibit in-plane curves near the ripple centres in the individual tracks of laser scan and the curving …
View article: On functional boron nitride: Electronic structures and thermal properties
On functional boron nitride: Electronic structures and thermal properties Open
The past two decades have witnessed extensive explorations of boron nitride (BN) largely due to its unique optoelectronic properties, mechanical robustness, high thermal conductivity, thermal and chemical stability. Crystal growth and func…
View article: Controlled Formation of Conduction Channels in Memristive Devices Observed by X‐ray Multimodal Imaging
Controlled Formation of Conduction Channels in Memristive Devices Observed by X‐ray Multimodal Imaging Open
Neuromorphic computing provides a means for achieving faster and more energy efficient computations than conventional digital computers for artificial intelligence (AI). However, its current accuracy is generally less than the dominant sof…
View article: Comparisons on localized surface modifications of stainless steels induced by laser shock peening and robotic hammer peening
Comparisons on localized surface modifications of stainless steels induced by laser shock peening and robotic hammer peening Open
Localized surface peening processes have been carried out on single spots by employing laser-shock peening (LSP) and robotic hammer peening (RHP) on stainless steels SS304L and SS316L. The LSP process has induced apparent γ-to-ɛ martensite…
View article: Improved <i>zT</i> in Nb<sub>5</sub>Ge<sub>3</sub>–GeTe thermoelectric nanocomposite
Improved <i>zT</i> in Nb<sub>5</sub>Ge<sub>3</sub>–GeTe thermoelectric nanocomposite Open
Doping high electrical conductivity Nb 5 Ge 3 precipitates into GeTe results in nanoprecipitates phonon scattering, while retaining electrical mobility. As a result, thermoelectric zT of GeTe is drastically enhanced to 2.0 at 723 K.
View article: Physical Intuition to Improve Electronic Properties of Thermoelectrics
Physical Intuition to Improve Electronic Properties of Thermoelectrics Open
Thermoelectrics convert heat to electricity and vice versa. They are of technological importance in cooling and energy harvesting. Their performances are defined by figure of merit, zT . Decades of studies have largely focused on the devel…
View article: A Systematic Approach for Semiconductor Half-Heusler
A Systematic Approach for Semiconductor Half-Heusler Open
The key to designing a half-Heusler begins from the understanding of atomic interactions within the compound. However, this pool of knowledge in half-Heusler compounds is briefly segregated in many papers for specific explanations. The nat…
View article: Risk assessment of airborne COVID-19 exposure in social settings
Risk assessment of airborne COVID-19 exposure in social settings Open
The COVID-19 pandemic has led to many countries oscillating between various states of lock-down as they seek to balance keeping the economy and essential services running and minimizing the risk of further transmission. Decisions are made …
View article: The Efficacy of Plant-Based Ionizers in Removing Aerosol for COVID-19 Mitigation
The Efficacy of Plant-Based Ionizers in Removing Aerosol for COVID-19 Mitigation Open
Small-sized droplets/aerosol transmission is one of the factors responsible for the spread of COVID-19, in addition to large droplets and surface contamination (fomites). While large droplets and surface contamination can be relatively eas…
View article: Giant piezoelectricity in oxide thin films with nanopillar structure
Giant piezoelectricity in oxide thin films with nanopillar structure Open
Simple strain enhancement Piezoelectric materials are important as sensors and transducers for applications such as ultrasonics. Liu et al. discovered nanopillar regions in a sodium-niobium-oxide film that substantially improve the piezoel…
View article: Robotic hammer peening-induced martensite in austenitic steels: Spatial distributions of plastic deformation and phase transformation
Robotic hammer peening-induced martensite in austenitic steels: Spatial distributions of plastic deformation and phase transformation Open
We studied the effect of robotic hammer peening (RHP) on plastic deformation, martensite transformation, and electrochemical process of austenitic stainless steels (SS304L) by employing microscopy and X-ray diffraction (XRD) characterizati…