Phutung Research Institute

Research

Publications

25 publications from Phutung Research Institute — journal articles, conference proceedings and preprints, 2016–2025.

25 results · showing 1–12 · page 1 of 3

Outcomes of the Fifth International Conference on Bioscience and Biotechnology, 2024 (ICBB-2024): Planetary Health—A Local Discourse

Suvechhya Bastola, Maria Alba Abad, Anurag Adhikari, Gaurav Adhikari, Aagat Awasthi, Ashim Dhakal, Rijan Maharjan, Rojlina Manandhar, Rukumesh Paudyal, Sunil Pokhrel, Amina Singh, Neha Shrestha, Lekhendra Tripathee, Remco Kort, and Prajwal Rajbhandari

Conference Report: Challenges

he Fifth International Conference on Bioscience and Biotechnology, 2024 (ICBB-2024), held in Godawari, Nepal, from 21 to 24 April 2024, aimed to address planetary health challenges within the local context of Nepal while fostering global dialogue. Bringing…

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Autofluorescence spectroscopy meets UNICEF’s target for water quality detection

Anish Dahal, Anusa Thapa, Rijan Maharjan, Suvechhya Bastola, Sishir Gautam, Prashant Waiba, Prajwal Rajbhandari, Emiliano R. Martins, Thomas F. Krauss, Ashim Dhakal

Preprint (Research Square)

More than half of the global population lacks access to safe and tested drinking water. Recommended culture-based microbiological water quality assessment methods are impractical in resource-limited settings because they are slow, require costly reagents,…

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Research institutes from nest eggs: challenges and the way forward

Rijan Maharjan, Anusa Thapa, Prajwal Rajbhandari & Ashim Dhakal

Nature Reviews Methods Primers

Small economies with limited financial, technical, governmental and human resources and governance capacity encounter a number of challenges in addressing research and development needs. We share our attempts to face these challenges in Nepal, as well as key…

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When a lensless fluorometer outperforms a lensed system

Asim Maharjan, Prashant Waiba, Shreya Shrestha, Rijan Maharjan, Augusto Martins, Kezheng Li, Emiliano R. Martins, Thomas F. Krauss, and Ashim Dhakal

Optica

The excitation and collection of optical signals using lenses form the basis for many applications in imaging, nephelometry, fluorometry, and spectroscopy. While lenses are needed for imaging systems, their use is not so obvious for volume sensing…

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A Case for Optics-based Microbial Risk Assessment of Potable Water

Rijan Maharjan, Anusa Thapa, Prajwal Rajbhandari, Daniele Faccio, Emiliano R. Martins, Thomas F Krauss, and Ashim Dhakal

CLEO 2024 Technical Digest Series (Optica Publishing Group, 2024), paper ATu4A.2

Reagentless optics-based techniques, such as fluorimetry, outperform all current methods in all key requirement categories for microbial risk assessment of potable water in resource-limited settings, provided that their specificity for viable bacteria is…

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Low-cost Dynamic Light Scattering to Detect Rotavirus Particles in Drinking Water

Anish Dahal, Shishir Gurung, Avash Kattel, Rijan Maharjan, Jack Radford, Philip Binner, Ilya Starshynov, Daniele Faccio, and Ashim Dhakal

FiO+LS

We demonstrate a simple method that uses dynamic light scattering for the detection of rotavirus particles in water. Our method uses low-cost and reagent-free instrumentation and materials feasible for implementation in resource-limited settings.

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Spectrometer based on a compact disordered multimode interferometer.

Poudel Ankit, Pravin Bhattarai, Rijan Maharjan, Maddison Coke, Richard J. Curry, Iain F. Crowe, and Ashim Dhakal.

Optics Express 31, no. 8 (2023): 12624-12633.

We present a compact, CMOS compatible, photonic integrated circuit (PIC) based spectrometer that combines a dispersive array element of SiO2-filled scattering holes within a multimode interferometer (MMI) fabricated on the silicon-on-insulator (SOI) platform.…

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(Invited) Improving Detection of Fecal Contamination in Water Using Machine-Learning-Assisted Fluorescence Spectra Analysis

Rijan Maharjan, Nripesh Parajuli, Sishir Gautam, Suvechhya Bastola, Prashant Waiba, Anusa Thapa, Prajwal Rajbhandari, Thomas Krauss, and Ashim Dhakal

Optica Sensing Congress, Munich 2023

Spectral information from humic like-fluorescence, in addition to the spectra of tryptophan-like fluorescence, improve the Receiver Operating Characteristic for detection of fecal contamination in water. To demonstrate this, we apply the random forest…

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Hybrid Metalens for Miniaturised Ultraviolet Fluorescence Detection

Kezheng Li, Augusto Martins, Sanket Bohora, Ashim Dhakal, Emiliano R. Martins, Thomas Krauss

Adv. Optical Mater., 2300852. (2023)

The advantages of metalenses to enable miniaturized systems have been well established, especially in the visible and infrared wavelength regimes. The ultraviolet (UV) presents a final frontier because feature size scales as the wavelength, so realizing a…

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Nanophotonic waveguide integrated evanescent upconversion spectroscopy for biomedical applications

Ankit Poudel, Pravin Bhattarai, Rijan Maharjan, Ashim Dhakal

Presented in International Conference on Bioscience and Biotechnology, Suraha, Nepal 2022

Enormous progress has been made in demonstrating various applications of nanophotonics. This emerging application of PICs demands a broad optical wavelength range. SiN waveguide system has proven to be a prominent candidate in that regard [1]. Furthermore,…

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Fluorescence Properties of Organic Contamination in Water

Sishir Gautam, Prashant Waiba, Sanket Bohora, Suvechhya Bastola, Anusa Thapa, Prajwal Rajbhandari, and Ashim Dhakal

International Conference on Bioscience and Biotechnology, Suraha, Nepal

Increased anthropogenic inputs in the water body have dramatically changed the loads and compositions of dissolved organic matter (DOM) in urbanized streams, which has a negative impact on the water. As such, it is imperative to monitor water quality…

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