E2M Lab - ITB

Energy and Environmental Materials Laboratory

Welcome to E2M Lab-ITB

Research Highlights

Materials for Battery Research

Carbon Quantum Dots

Event Highlights

Exciting news! 🚀 E2M Laboratory proudly took part in the very first KSTI Exhibition at SABUGA ITB, August 7–9, 2025. KSTI — Indonesia’s Convention of Science, Technology, and Industry — made its debut this year, bringing together innovators, researchers, and industry leaders from across the nation. What an inspiring event to showcase innovation and collaboration!

E2M booth at KSTI 2025

Prof. Brian Schmidt (Nobel Prize-winning astrophysicist ), Prof. Chennupati Jagadish (renowned semiconductor optoelectronics scientist), and Prof. Tatacipta Dirgantara (ITB Rector) at the E2M booth at KSTI.

October 10, 2024, Our member Reza Umami received the Best Presenter Award at The International Conference on Physics And Technology of Advanced Materials (ICPTAM) 2024, held at Sanur-Bali, Indonesia, 7-10 October 2024. <Photo>
July 9-11, 2024 Dr. Fitri Aulia Permatasari attended the Global Conference for Women Leaders and Emerging Researchers in Materials Science (GLOW 2024) at NTU Singapore. She was chosen to receive a travel award and presented her research on quantum dots at the conference.
March 11-17, 2024 Dr. Fitri Aulia Permatasari and Yuvita Kiki Wulandari visited the ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, UK to conduct the neutron scattering characterization
23 November 2023 Dr. Fitri Aulia Permatasari was honored as one of the recipients of L’Oréal-UNESCO For Women in Science Indonesia fellowships.
18 November 2023 Dr.Eng. Ferry Iskandar was officially inaugurated as one of the professors of Institut Teknologi Bandung
News in Detik Edu about Dr. Jotti Karunawan, the first graduate of the Nanoscience and Nanotechnology Doctoral Program of ITB. https://www.detik.com/edu/edutainment/d-6839985/itb-luluskan-doktor-sains-dan-teknologi-nano-pertama-bahas-ini-di-disertasinya
14 July 2023 Congratulations to Jotti Karunawan for successfully defending his Doctoral Dissertation!

Latest Publications

Techno-economic analysis of organic acid-based hydrometallurgical recycling of NCM cathodes , Journal of Environmental Chemical Engineering, (IF=7.2)

This study evaluates the economic feasibility of two green recycling processes for lithium-ion battery (LIB) cathodes using organic acids—ascorbic acid and DL-malic acid—as leaching agents. By scaling the processes to a 10 kg/day capacity, a techno-economic analysis was conducted considering capital costs, production costs, and financial performance metrics such as ROI, PBP, IRR, and NPV. The DL-malic acid process proved to be more economically viable, offering a shorter payback period, higher NPV, and better performance under varying capacities. Sensitivity analysis revealed that product price is the most critical factor influencing profitability. The findings support the potential of sustainable LIB recycling and offer insights for future scale-up and policy planning.

Microflower CuS:Ni as a negative electrode with battery-type behavior for all transition-metal-sufides-based high-performance asymmetric supercapacitors, Electrochimica Acta (IF=5.5)

This study focuses on the development of high-energy-density asymmetric supercapacitors (ASCs) using transition metal sulfides. A simple hot-injection method was employed to synthesize both positive and negative electrodes. The negative electrode, made of copper sulfide (CuS), was doped with nickel (Ni) to enhance redox activity, as confirmed by electrochemical tests and density functional theory (DFT) analysis. The optimized 20% Ni-doped CuS (CuS:Ni) electrode achieved a high specific capacity of 714 C/g at 1 A/g. When paired with NiS as the positive electrode, the resulting ASC delivered a specific capacity of 435 C/g and an energy density of 61.87 Wh/kg at 517.86 W/kg. These findings demonstrate the potential of all-transition-metal-sulfide-based materials in next-generation high-performance ASCs.

pH-Triggered Phase Transitions, Coexposure of (001) and (110) Facets, and Oxygen Vacancies in BiOCl Photocatalysts, Inorganic Chemistry (IF=4.7)

This study presents a new approach to enhance the photocatalytic performance of bismuth oxychloride (BiOCl) by adjusting the pH during hydrothermal synthesis. By controlling the pH, researchers were able to manipulate the phase composition, facet orientation, and oxygen vacancy concentration in BiOCl. The sample synthesized at pH 7 showed the highest photocatalytic activity in degrading rhodamine B (RhB), due to the coexposure of (001) and (110) crystal facets and a higher number of oxygen vacancies. Density functional theory analysis confirmed that these vacancies improve charge separation, thereby boosting photocatalytic efficiency. This work demonstrates that pH tuning is an effective strategy to optimize BiOCl for environmental and solar energy applications.

N, O-Functionalized Curcumin-Derived Carbon Dots for Reactive Oxygen Species Regulation: Mechanistic Insights into Biomedical Applications, ACS Applied Bio Materials (IF=4.6)

This study explores how reactive oxygen species (ROS) are regulated in nitrogen- and oxygen-functionalized curcumin-derived carbon dots (Cur-CDs) using both experiments and time-dependent density functional theory (TD-DFT). The Cur-CDs were synthesized through a green hydrothermal method, producing water-soluble nanoparticles under 10 nm in size, with broad UV–NIR absorption and strong blue fluorescence. They demonstrated a 29.6% photothermal conversion efficiency and exhibited both light emission and heat dissipation behaviors. TD-DFT results suggest that certain nitrogen surface groups help lower the singlet–triplet energy gap (to 0.33 eV), enhancing ROS generation. In vitro tests showed selective toxicity toward liver cancer cells (HepG2) with effective cellular uptake, indicating their potential use in cancer diagnosis and treatment. Overall, Cur-CDs emerge as sustainable, multifunctional nanomaterials with strong promise for biomedical applications.

Energy and Environmental Materials Laboratory

Department of Physics, Faculty of Mathematics and Natural Sciences,

Institut Teknologi Bandung

Jl. Ganesha No 10, Bandung, Indonesia 40132

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