Evidence map›Paper›PMID 41188259›Full record

ArticleScientific reports2025

Eco-friendly synthesis of carbon quantum dots from lemons for enhanced uric acid detection using gold-integrated surface plasmon resonance.

Muhammad Afiz Shahmer Muhammad Noor Afandi, Yap Wing Fen, Hazwani Suhaila Hashim, Rahayu Emilia Mohamed Khaidir, Nur Alia Sheh Omar, Wan Mohd Ebtisyam Mustaqim Mohd Daniyal, Jaafar Abdullah, Huda Abdullah, Ahmad Taufiq, Faten Bashar Kamal Eddin

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Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

10 authors.

Muhammad Afiz Shahmer Muhammad Noor AfandiDepartment of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang, 43400 UPM, Selangor, Malaysia.
Yap Wing FenDepartment of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang, 43400 UPM, Selangor, Malaysia. yapwingfen@upm.edu.my.
Hazwani Suhaila HashimDepartment of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang, 43400 UPM, Selangor, Malaysia.
Rahayu Emilia Mohamed KhaidirFunctional Nanotechnology Devices Laboratory, Institute of Nanoscience and Nanotechnology, Universiti Putra Malaysia, Serdang, 43400 UPM, Selangor, Malaysia.
Nur Alia Sheh OmarFunctional Nanotechnology Devices Laboratory, Institute of Nanoscience and Nanotechnology, Universiti Putra Malaysia, Serdang, 43400 UPM, Selangor, Malaysia.
Wan Mohd Ebtisyam Mustaqim Mohd DaniyalPhysics Section, School of Distance Education, Universiti Sains Malaysia, Gelugor, Pulau Pinang, 11800, Malaysia.
Jaafar AbdullahFunctional Nanotechnology Devices Laboratory, Institute of Nanoscience and Nanotechnology, Universiti Putra Malaysia, Serdang, 43400 UPM, Selangor, Malaysia.
Huda AbdullahDepartment of Electrical, Electronic, and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, 43600 UKM, Selangor, Malaysia.
Ahmad TaufiqDepartment of Physics, Faculty of Mathematics and Natural Science, Universitas Negeri Malang, Jl. Semarang 5, Malang, 65145, Indonesia.
Faten Bashar Kamal EddinCentre for Optical and Electromagnetic Research, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310058, P. R. China.

Funding

Universiti Putra Malaysia GPB/2024/9810900
6 · The paper itself

Abstract

In this study, the preparation of carbon quantum dots (CQDs) derived from lemon juice as a precursor using hydrothermal method is described. The optical properties of the CQDs were characterized using photoluminescence spectroscopy, which exhibited a maximum emission peak at 450 nm, with the highest intensity recorded for the sample treated at 180 °C. Fourier transform infrared spectroscopy confirmed the presence of amino, carboxylic acid, carboxyl, and hydroxyl groups in the CQDs. Transmission electron microscopy analysis revealed that the CQDs were predominantly spherical in shape, with an average particle diameter of approximately 4.73 nm. The integration of the gold/CQDs thin film with surface plasmon resonance spectroscopy enabled the detection of uric acid. Using Winspall software, the refractive index of the gold/CQDs thin film was determined to be n + ik = 1.6014 + 3.7i, with a thickness of 12.00 nm. The sensor demonstrated a linear response to uric acid concentrations up to 1 µM, achieving sensitivity values of 3.968° µM

Indexed as

CarbonCitrusGoldQuantum DotsSurface Plasmon ResonanceUric AcidGreen Chemistry TechnologySpectroscopy, Fourier Transform InfraredCarbonGoldUric AcidCarbon quantum dotsOpticalSensingSurface plasmon resonanceThin filmUric acid

Identifiers

PMID41188259
PMCPMC12586430

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