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Associate Professor

Chew Beng SOH

Associate Professor
Deputy Cluster Director, Engineering
PhD (Electrical and Computer Engineering), National University of Singapore, Singapore
Cluster:
Engineering
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SIT Appointments

  • Deputy Cluster Director, Engineering
    – Present
  • Associate Professor
    – Present
  • Programme Director for Sustainable Infrastructure Engineer (Building and Services)
    –
  • Deputy Programme Director, SIT-NU BEng (Hons) Electrical Power Engineering
    –
  • Deputy Programme Director, NU BEng (Hons) Electrical Power Engineering
    –
  • Assistant Professor
    –

Education

  • PhD (Electrical and Computer Engineering)
    National University of Singapore , Singapore
  • BEng (Hons) Electrical Engineering
    National University of Singapore , Singapore

Achievements

  • Finalist for the 8th Asia Pacific Eldercare Innovation Award 2020, Nov 202, under the category, BEST SMART CARE TECHNOLOGY – PRODUCT Best technology
    –
  • Open CV Al Competition 21, 3rd Prize, Eastern Asia + South Eastern Asia Regional Prize Winner of the Team: Train and Track
    –
  • Merit Award winner, TAN Kah Kee Young Inventors’ Award 2012 entitled: "Quantum Dots incorporated Red and Blue III-Nitride LEDs on nano-hexagonal array template for greenhouse growers"
  • ICMAT Best Poster Award (2009, 2011)
    –

Professional Memberships

  • Chartered Engineer of Institute of Engineers Singapore (IES) in Built Environment Engineering
    – Present
  • Singapore Certified Energy Manager
    –
  • Member Institute of Engineers Singapore (IES)
    –
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Research Interests

  • Compound semiconductor
    • Mainly in III-V LEDs and HEMTs devices
  • Growth of III-V Nitride structures
    • MQWs, LEDs, InGaN nanostructures and other materials system
    • AlGaN, InN for Solid State Lighting (SSL) application
  • Upconversion nanoparticle

    • Design & Synthesis
      • Lanthanide-doped nanostructures (e.g., Yb³⁺, Er³⁺, Tm³⁺ systems)
      • Core–shell and multi-shell UCNP architectures for enhanced quantum yield
      • Controlled particle size, morphology, and crystallinity
    • Optical & Energy Transfer Engineering
      • Photon upconversion mechanisms (ETU, ESA, cross-relaxation)
      • Tailoring emission wavelengths (UV–visible–NIR tuning)
      • Spectral matching for energy harvesting, sensing, and photonics
    • Interface Integration
      • Coupling UCNPs with semiconductors (e.g., GaN, Si)
      • UCNP–microcavity and photonic structure integration
      • Enhancement of emission via Purcell effect and cavity confinement
    • Characterization
      • Photoluminescence spectroscopy and lifetime analysis
      • Quantum efficiency measurement
      • Structural analysis (SEM, TEM, XRD)
  • Generation of photonic structures and surface patterning technique for enhanced light extraction using
    • Nanosphere lithography, Anodized Alumina Oxidation (AAO), Electro-chemical Etching and E-Beam Lithography for single photon generations, LEDs and other devices.
  • Fabrication of porous semiconductor materials for Solid State Lighting, sensing and photovoltaic application
  • Application of artificial light source
    • LEDs for horticulture and photodynamic therapy

Current Projects

  • coPI: Holistic Programme for Improvement of Marine Tilapia Aquaculture
    – Present

    A Holistic Programme for Improvement of Marine Tilapia Aquaculture focuses on enhancing productivity, sustainability, and resilience through an integrated approach spanning genetics, nutrition, environment, and farm management. The programme combines selective breeding for salt-tolerant and disease-resistant strains, optimisation of feed formulations and feeding regimes, and improvements in water quality via advanced systems such as recirculating aquaculture systems (RAS). Within this programme, the SIT team will develop and build a prototype system to evaluate fish feed performance, specifically targeting palatability, attractivity, and digestibility, enabling controlled and quantitative assessment of feed efficiency and fish response. This is complemented by sensor-based monitoring and data analytics to correlate feeding behaviour with growth and health indicators.
  • co-PI “UrEco 2030+: Optimizing Urban Ecosystem Services Model for Urban Climate and Biodiversity in Singapore towards 2030 and Beyond”
    – Present

    UrEco 2030+ aims to develop an integrated, data-driven modelling framework to quantify, optimize, and enhance urban ecosystem services in Singapore, with a focus on urban climate resilience and biodiversity outcomes. As Singapore intensifies its efforts toward sustainability and climate adaptation, the project addresses the need for science-based tools to guide planning decisions that balance urban development with ecological performance.

     

    The project will advance existing urban ecosystem service models by incorporating high-resolution spatial data, climate projections, and biodiversity indicators into a unified platform. Key ecosystem services of interest include urban heat mitigation, carbon sequestration, stormwater regulation, air quality improvement, and habitat connectivity. By coupling environmental monitoring data with predictive modelling, UrEco 2030+ seeks to evaluate how different urban design strategies such as green infrastructure, vertical greenery, urban forests, and water-sensitive planning affect both microclimate regulation and ecological health.

  • PI: BIZE_UrFarm: Building Integrated Zero Emission Urban Farming towards sustainable farmscape in Milan and Singapore
    – Present

    BIZE_UrFarm: Building Integrated Zero Emission Urban Farming towards Sustainable Farmscape in Milan and Singapore is a collaborative initiative aimed at developing scalable, climate-resilient urban agriculture systems that achieve near-zero emissions. The project integrates advanced controlled-environment farming, energy-efficient systems, circular resource management (water, nutrients, and waste), and smart digital monitoring to optimise productivity within dense urban settings. By leveraging complementary expertise from both Milan and Singapore, BIZE_UrFarm seeks to demonstrate sustainable farmscape models that can enhance local food security, reduce environmental footprint, and support urban biodiversity, while providing a replicable framework for future smart city agriculture developments.
  • Lead co-PI Micro-grid Digital Twin Development for Effective Energy Management and Deployment
    – Present

    EMA  Exploiting  Distributed  Generation  Programme  (EDGE)

Past Projects

  • coPI: Understanding the Transmission Risks of SARS-CoV-2 and the Fundamental Rethinking of HVAC System Design in the Post-Pandemic World
    –

    Understanding the Transmission Risks of SARS-CoV-2 and the Fundamental Rethinking of HVAC System Design in the Post-Pandemic World focuses on how airborne transmission of respiratory pathogens has reshaped the design and operation of indoor ventilation systems. The project examines aerosol dynamics, airflow patterns, and occupant exposure risks to inform safer built environments, leading to a paradigm shift from conventional comfort-based HVAC design to health-centric, resilient systems. This includes enhanced ventilation strategies, air filtration (e.g., HEPA), UV-C disinfection, and intelligent monitoring of indoor air quality. Ultimately, the work aims to establish new design guidelines and standards that mitigate infection risks while maintaining energy efficiency and sustainability in future buildings.
  • Co-PI: Embedded Fastener Inspection and Monitoring
    –

    Urban Mobility Grand Challenge Funding Initiative, LTA (UMGC-L015 )

  • Lead PI: Urban-metabolic Farming-module (UmFm): a novel farming module towards eco-resilient megacity farmscape in 2030
    –

    Singapore food Story (SFS) R&D Programme 1st Grant Call (Theme 1 “Sustainable Urban Food Prodcution”  (SFS_RND_SUFP_001_09)

  • Co-PI Study on the Use of Probiotics to Increase Yield and Nutritional Value in an Integrated Rooftop Hydroponic Farming and Solar Photovoltaics (PV) System
    –

    Temasek Foundation – SMF Research Grant Programme – 10th Grant Call

  • Lead Co-PI Development of Next Generation Lithium-Ion ESS solution & Smart Distributed ESS management application for fire hazard mitigation under Hot-Humid climatic condition
    –

    Energy Programme EMA-KETEP Joint Grant Call 2019 (EMA-EP004-EKJGC-0008)

  • Co PI: Study on the Acceptable Reflectance Level of Body Wrap, Paintwork and Windscreen on Road Vehicles
    –
    External Funded Project by LTA - Land  Transport Innovation Fund (LTIF)
  • Lead PI Bio-inspired hip protector based on exo-skeleton of mantis shrimp
    –

    External funded project by MOE, (ID: MOE2017-TIF-1-G-011)

  • PI : Generation of submicron SiO2 structure with stripe pattern on glass substrate
    –

    External funded project by DSO   (DSOCL14072)

  • Co-PI/ collaborator for A*STAR SERC-NSF program “III-Nitride Nano-materials Growth and Control for Solid-State Cavity Quantum Electrodynamics”
    –

    Jan 2013 –Dec 2015 

  • Co-PI/ collaborator for A*STAR JCO program, “Effects of different light qualities on skin and their use in photodynamic therapy in cosmetics and skin disorders”
    –

    July 2012- July 2015 
     

  • Co-PI/ collaborator for A*Car program titled “Gallium Nitride Power Devices for Automotive Applications (Phase 2)”
    –

    June 2012 – Dec 2014

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Journal Papers

  • Feng Wei, Xuebing Chen. Shuyu Cao, Chew beng Soh et al ,”Coordinate Control of Grid-Side Energy Storage Power Station with Consideration of Communication Delays in Grid-Connected Micro-Grids” IEEE X’plore (2021) DOI: 10.1109/ICEPE50861.2021.9404414

  • C. B. Soh et al Absorptive protective padding with electrospinned polyester fibers with hydrogel matrix.: Mater. Sci. Eng. 744 012017 (2020)

  • Samuel W.Y. Lim et al Comparison of Tensile and Impact Absorption properties of Bio-Inspired Helicoidal stacked with Cross-Ply Stacked Carbon Fiber Laminate”, Mater. Sci. Eng. 744 012018 (2020)

  • Xuebing Chen. Feng Wei, Shuyu Cao, Chew Beng Soh et al PMU Placement for Measurement Redundancy Distribution Considering Zero Injection Bus and Contingencies”, IEEE Systems Journal, 1937-9234 (2020)

  • Htet Kywa Ye, S. R. Shannigrahi, C.B.Soh et al, “Development of (Zr, Mn) doped X-type hexaferrites for high frequency EMI shielding applications”, J. Magn. Magn. Mater, v465, pp716-726 (2018).

  • C. B. Soh, C. M. Simon Yu, Samuel Lim, G. S. Kwang, “Plasmonic enhanced emission from nanostructured embedded InGaN/GaN MQWs with silver nanoparticles”, IEEE Xplore (2018) 10.1109/ISEMC.2018.8393915

  • Kwadwo Konadu Ansah-Antwi, Chew Beng Soh, Hongfei Liu et al.“Growth Optimization and characterization of Gan epilayers on multi-faceted (111) surfaces etched on SI(100) substrates”,  Journal of Vacuum Science and Technology A, 33, p061517 (2015)

  • H. F. Liu, J. Huang, C. G. Li, C. B. Soh et al. "Effect of Morphological and structural properties on SIMS Depth profiles of InGaN/GaN MQWs grown on sapphire by MOCVD" J. of Molecular and Engineering Materials vol(3), 4, p1550002- 1550008 (2015)

  • Xinke Liu, M. A. Bhulyan, P. Somasuntharam, Chew Beng Soh et al. “High voltage AlGaN/GaN metal-oxide semiconductor high electron mobility transistors with regrown InGaN contact using a CMOS compatible gold free process”, Applied Physics Express 7, 12, p126501 (2014).

  • I. P. Seetoh, C. B. Soh, E. A. Fitzgerald, and S. J. Chua, “Auger recombination as the dominant recombination process in indium nitride at low temperatures during steady-state photoluminescence”, Appl. Phys. Lett, 102, 101112 (2013)

  • C.B. Soh, C. B. Tay, Rayson Tan J. N. et al, “Nanopore morphology in porous GaN template and its effect in LEDs emission”, J. of Phys D: Appl. Phys, 46, p365102 (2013)

  •  K. K. Ansah Antwi, C.B. Soh, Q. Wee et al. "Crystallographically tilted and partially strained relaxed GaN grown on inclined (111) facets etched on Si(100) substrates” J. of Appl Phys, 114, p243512 (2013).

  • Siah Hong Tan, Chew Beng Soh, “Tapered and aperiodic silicon nanostructures with very low reflectance for solar hydrogen evolution”, Appl. Phys. Lett, 101, 133906 (2012).

  • C. B. Soh, W. Liu, H. Hartono, S.J. Chua, “Enhanced optical performance of amber emitting quantum dots incorporated InGaN/GaN light-emitting diodes with growth on UV-enhanced electrochemically etched nanoporous GaN”, Appl. Phys. Lett. 98, 191906 (2011)

  • K.H. Dai, C. B. Soh, S. J. Chua, “Influence of the alignment of ZnO nanorod arrays on light extraction enhancement of GaN-based light-emitting diodes”, J. Appl. Phys. 109, 083110 (2011)

  • C. B. Soh, S. J. Chua, W. Liu’ “Dots deliver beautiful whites”, Compound Semiconductor Magazine, , p40-43 Nov/Dec 2010

  • C.B. Soh, “Singapore researchers create amber light for nitride LEDs”, Semiconductor Today: Weekly E-Brief, http://www.semiconductor-today.com/news_items/2010/NOV/ASTAR_091110.htm, 9 Nov 2010

  • C. B. Soh, W. Liu, A. M. Yong, S. J. Chua, S. Y. Chow, S. Tripathy, R. J. N. Tan, ”Phosphor-Free Apple-White LEDs with Embedded Indium-Rich Nanostructures Grown on Strain Relaxed Nano-epitaxy GaN” Nanoscale Res. Lett. 5 p1788-1794, 2010

  • C. B. Soh, C. B. Tay, S. J. Chua, H.Q. Le, N. S. S. Ang, J. H. Teng, ”Optimization of hydrothermal growth ZnO Nanorods for enhancement of light extraction from GaN blue LEDs” J. Cryst, Growth 312, p1848-1854 2010

  • W. Liu, Rayson J. N. Tan, C. B. Soh, S. J. Chua, “The effects of cap layers on electrical properties of Indium Nitride films”, Appl. Phys. Lett. 97 p042110, 2010.

  • C. B. Soh, W. Liu, S. J. Chua, N. S. S. Ang, A. M. Yong. C. Lai, J. H. Teng, “Stress relaxed nano-epitaxy GaN for growth of phosphor-free Indium rich nanostructures incorporated in apple white LEDs.” Phys. stat. Solidi A, 207, p1400, 2010

  • S. K. Mohanta, S. Tripathy, X. H. Zhang, D. C. Kim, C. B. Soh, A. M. Yong, W. Liu, and H. K. Cho, "Exciton recombination in ZnO nanorods grown on GaN/sapphire template", Appl. Phys. Lett., 94, p041901, 2009.

  • C. B. Soh, S. Y. Chow, L. Y. Tan, H. Hartono, W. Liu, and S. J. Chua, "Enhanced luminescence efficiency due to carrier localization in InGaN/GaN heterostructures grown on nanoporous GaN templates", Appl Phys Lett, 93, p173107, 2008.

  • C. B. Soh, B Wang, S J Chua, J. N. Tan, K. X. Lin, "Fabrication of a nano-cone array on a p-GaN surface for enhanced light extraction efficiency from GaN based tunable wavelength LEDs", Nanotechnology, 19, 405303, 2008.

  • C.B. Soh, W. Liu, J. H. Teng, S. Y. Chow, S. S. Ang, S. J. Chua "Cool white III-Nitride light emitting diodes based on phosphor-free indium-rich InGaN nanostructures" Appl. Phys. Lett, 92, p261909, 2008.

  • S. K. Mohanta, D. C. Kim, H. K. Cho, C. B. Soh, S. J. Chua, and S.Tripathy,* "Influence of Buffer Layer on Structural and Optical Properties of ZnO Nanorods Grown on Glass Substrates by Metalorganic Chemical Vapor Deposition", Electrochem Solid State Letters, 11, H143-H146, 2008.

  • C. B. Soh, S. Y. Chow, S. Tripathy, S. J Chua, "Reduction of V-pit and threading dislocation density in InGaN/GaN heterostructures grown on cracked AlGaN templates" J. Phys.: Condens. Matter 20, p095210, 2008.

  • H. Hartono, C.B. Soh , S. J. Chua, E. A. Fitzgerald, "High quality GaN grown from nanoporous GaN Template" J. Electrochemical Soc. 154 (12) H1004-H1007, 2007.

  • H. Hartono, C.B. Soh, S. Y. Chow, S. J. Chua, E.A. Fitzgerald "Reduction of threading dislocation density in Gan grown on strain relaxed nanoporous GaN template" Appl. Phys. Lett. 90, p171917, 2007.

  • C.B. Soh, H. Hartono, S. Y. Chow, S. J. Chua, E.A. Fitzgerald "Dislocation annihilation in regrown GaN on nanoporous GaN template with optimization of buffer layer growth" Appl. Phys. Lett, 90, p053112, 2007.

  • C. B. Soh, S. J. Chua, S. Tripathy, S. Y. Chow, D.Z. Chi and W. Liu, "Influence of composition pulling effect on two-dimensional electron gas induced at AlyInxGa1-x-yN/GaN interface" J. Appl. Phys. 98, p103704, 2005

  • C. B. Soh, S. J. Chua, S. Tripathy, H. F. Lim, D. Z. Chi, W. Liu, “ Assignment of deep levels causing yellow luminescence in GaN", J. Appl. Phys, 96, p1341 (2004)

  • C. B. Soh, S. J. Chua, H. F. Lim, D. Z. Chi, W. Liu and S. Tripathy, "Identification of deep levels in GaN associated with dislocations" J. Phys.: Condens. Matter 16, p6305, 2004

  • C. B. Soh, W. Liu, S. J. Chua, S. Tripathy and D. Z. Chi,"Inverted hexagonal pits formation in AlInGaN epilayer" Journal of Cryst. Growth, 268, p478-483, 2004

Conferences

  •  Neelakantam V. Venkatarayalu; W. W. Lee;. D. Tan; C. B. Soh, "Effect of Resistivity of ITO Thin Film When Used in transparent checkerboard Surfaces for RCS Reduction", PIERS 2017 

     

  • Sim Yu Ying, Soh Chew Beng, Lim Wei Yang, “Faraday Cage Shielding for Electronic Sensitive Device using High Permittivity Patterned Oxide Thin Film” ICMAT 2017. 9th International Conference on. Materials for Advanced Technologies. 18 – 23 June 2017. Suntec Singapore

  • C. B.Soh , Neelakantam Venkat, C. M. Simon Yu, Darren J. R. Chng, "Reduction of Electromagnetic Interference from mobile devices with high permittivity BaTiO3 and Fe3O4- TiO2 thin film" Published 2016 in 2016 IEEE Region 10 Conference (TENCON)

  • C. B. Soh, Axel C. S. Tan, Ronnie. J. W. Teo, Simon C. M. Yu, "Enhancement in Light Extraction Efficiency from LEDs grown on porous GaN deposited on patterned sapphire substrate", Proceedings of the World Engineer’s Summit (WES) on Climate Change 2015

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