Article
Biochemistry & Molecular Biology
Luis F. Soto-Garcia, Ingrid D. Guerrero-Rodriguez, Luu Hoang, Samantha Lauren Laboy-Segarra, Ngan T. K. Phan, Enrique Villafuerte, Juhyun Lee, Kytai T. Nguyen
Summary: Bacterial infections are becoming resistant to antibiotics due to their overuse, so alternative approaches are needed. This study explored the use of photo-responsive antimicrobial nanoparticles and nanocomposites to prevent or treat bacterial infections. The results showed that these nanocomposites have the potential to prevent antibiotic resistance and can be further optimized for biomedical applications.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
Lei Yu, Wenlong Xu, Huie Liu, Yan Bao
Summary: “Photocatalytic degradation technology is considered promising for treating dye wastewater. In this study, titanium dioxide-reduced graphene oxide composites were used to effectively degrade various dyes in water, showing excellent degradation performance and reusability.”
Article
Engineering, Chemical
Guanghui Wang, Jialing Dai, Qiuyan Luo, Nansheng Deng
Summary: A novel TiO2@ACD@RGO composite photocatalyst was successfully synthesized by a photochemical method, displaying high photocatalytic efficiency for the degradation of BPA with a reaction constant of 0.739 mg/L∙min, attributed to improved electron transfer and mass transfer at the interface. The predominant reactive oxygen species for BPA degradation were identified as O-2(-) and h(+). Additionally, the TiO2@ACD@RGO composite exhibited excellent stability and reusability after five cycles.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Physical
A. B. Migdadi, Qais M. Al-Bataineh, Ahmad A. Ahmad, H. M. Al-Khateeb, Ahmad Telfah
Summary: TiO2 / rGO NCs, prepared by incorporating reduced graphene oxide with titanium dioxide nanoparticles, exhibit high photocatalytic efficiency and excellent degradation efficiency of 4-nitrophenol.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Biochemistry & Molecular Biology
Monica Daescu, Madalina Chivu, Elena Matei, Catalin Negrila, Oana Cramariuc, Mihaela Baibarac
Summary: The aim of this study was to investigate the influence of blends based on TiO2 nanoparticles and reduced graphene oxide (RGO) on the photodegradation of acetaminophen (AC). TiO2/RGO blends were prepared with different RGO sheet concentrations, and the adsorption of TiO2 particles onto RGO sheets was demonstrated. The TiO2/RGO catalyst showed higher photodegradation efficiency than TiO2 alone, and PVC membranes modified with Au nanoparticles were able to act as both filters and SERS supports for the reused catalyst.
Article
Materials Science, Multidisciplinary
Nguyen Thi Huong Giang, Nguyen Duy Hai, Nguyen Tan Thinh, Nguyen Ngoc Tan, Ly Pho Phuong, Doan Ba Thinh, Nguyen Van Duc, Vo Nguyen Dai Viet, Huynh Khanh Duy, Mai Thanh Phong, Nguyen Huu
Summary: In this study, sulfur-doped titanium dioxide and its composite with porous reduced graphene oxide were synthesized and characterized. The composite showed superior photodegradation performance compared to the single material, and demonstrated high reusability.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Chemistry, Physical
Suresh Sagadevan, J. Anita Lett, Getu Kassegn Weldegebrieal, Md Rokon Ud Dowla Biswas, Won Chun Oh, Solhe F. Alshahateet, Is Fatimah, Faruq Mohammad, Hamad A. Al-Lohedan, Suriati Paiman, Jiban Podder, Mohd Rafie Johan
Summary: Evaluation of rGO-TiO2 nanocomposite showed good gas sensing and photocatalytic activity, with sensitivity and selectivity towards hydrogen and oxygen, as well as effective removal of RhB and MB dyes under visible light irradiation. The study highlighted the potential of rGO-TiO2 nanocomposite for practical applications in nanotechnology.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Fengna Dai, Shangying Zhang, Qi Wang, Haiquan Chen, Chunhai Chen, Guangtao Qian, Youhai Yu
Summary: The novel reduced graphene oxide/TiO2-polyphenylenesulfone (rGO/TiO2-PPSU) hybrid ultrafiltration membrane exhibits efficient visible-light-driven photocatalytic degradation of organic pollutants and superior antifouling properties. Compared to membranes prepared with graphene oxide and TiO2 separately, the rGO/TiO2-PPSU membrane showed significantly improved photodegradation of phenazopyridine hydrochloride solution under UV and visible light.
FRONTIERS IN CHEMISTRY
(2021)
Article
Environmental Sciences
Vu Thi Thu, Mai Hai Trieu, Nguyen Hoang Thuy An, Nguyen Tien Dat, Nguyen Dieu Linh, Nguyen Ba Manh
Summary: In this study, a mussel-inspired biosorbent combined with graphene oxide was developed for removing organic dyes from water sources. The composite was prepared by self-polymerization of dopamine in a weak alkaline solution containing graphene oxide. The morphology and structure analysis revealed that polydopamine gradually covered the surface of graphene oxide flakes, partially reduced these flakes, and formed small grains instead of large aggregates. The adsorption kinetics and isotherms of the biosorbent towards methylene blue followed pseudo-first order kinetics model and Langmuir isotherm. The as-prepared bio-sorbent shows great potential for remediating water sources contaminated with cationic organic molecules and heavy metal ions.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Chemistry, Physical
Annabella Selloni, Taehun Lee
Summary: The density and arrangement of oxygen vacancies play a crucial role in tuning the physicochemical properties of TiO2. In this study, we used density functional theory to investigate the geometries and stability of vacancy aggregates in rutile and anatase polymorphs of TiO2. Through extensive exploration, we found that divacancies prefer to align at second-nearest-neighbor trans positions in the same TiO6 octahedron, and ordered chains and planar aggregates of vacancies are energetically favorable over disordered noninteracting vacancies in both polymorphs. However, the energetic gain upon vacancy aggregation is much larger in rutile than anatase. As a result, vacancy complexes are stable at and above typical sample preparation and annealing temperatures in rutile, whereas only one-dimensional chain structures are predicted to survive at those temperatures in anatase.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Zhuquan Huang, Jiaqi Wang, Suwei Lu, Hun Xue, Qinghua Chen, Min-Quan Yang, Qingrong Qian
Summary: This research demonstrates that controlling the quality of graphene can significantly improve photocatalytic performance, with high-quality CVDG-TiO2 composites showing 26.2 times and 10 times higher photocatalytic hydrogen evolution activity compared to bare TiO2 and reduced graphene oxide (RGO)-TiO2, respectively. Experimental characterization reveals that few-layer CVDG with low defect density can better unleash the electrical conductivity potential of graphene, leading to improved separation and lifetime of photoexcited charge carriers in graphene-TiO2.
ACS APPLIED ENERGY MATERIALS
(2021)
Review
Biotechnology & Applied Microbiology
Ali Taghizadeh, Mohsen Taghizadeh, Mohsen Khodadadi Yazdi, Payam Zarrintaj, Joshua D. Ramsey, Farzad Seidi, Florian J. Stadler, Haeshin Lee, Mohammad Reza Saeb, Masoud Mozafari
Summary: After billions of years, nature still serves as inspiration for developing new technologies and materials. Wet and strong adhesion by Mytilidae mussels has inspired the development of advanced adhesives for moist conditions. A deep understanding of the chemical moieties and microenvironmental conditions involved in wet adhesion is essential for optimal design. Muscle-inspired chemistry has versatile applications in various fields, particularly in bioengineering.
BIOENGINEERING & TRANSLATIONAL MEDICINE
(2022)
Article
Materials Science, Ceramics
Tingting Xiong, Yin Ye, Bin Luo, Liping Shen, Dongmei Wang, Meikun Fan, Zhengjun Gong
Summary: The 3D TA-TiO2-GA with network architectures and in situ growth of TiO2 NPs showed excellent photocatalytic performance and reusability in degrading organic contaminants. Mechanistic studies revealed the important roles of adsorption and photocatalysis, with superoxide radical anions and hydroxyl radicals as major reactive oxidative species. This study provides a novel alternative for solar light-driven environmental applications.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Apisit Karawek, Kittipad Kittipoom, Labhassiree Tansuthepverawongse, Nutkamol Kitjanukit, Wannisa Neamsung, Napat Lertthanaphol, Prowpatchara Chanthara, Sakhon Ratchahat, Poomiwat Phadungbut, Pattaraporn Kim-Lohsoontorn, Sira Srinives
Summary: Photoreduction of carbon dioxide (CO2) to high-value products using a photocatalyst is an effective technique for dealing with CO2 emissions. In this research, TiO2 nanosheets were synthesized using a hydrothermal technique and further composited with graphene oxide and copper oxide to create CTNSG, which exhibited outstanding photoactivity in converting CO2 gas to methane and acetone.
Article
Chemistry, Multidisciplinary
Chao Zhang, Li Xiang, Jiawen Zhang, Chang Liu, Zuankai Wang, Hongbo Zeng, Zhi-Kang Xu
Summary: This study reveals a previously unexplored adhesion mechanism in mussel-inspired chemistry, where 5,6-dihydroxyindole (DHI) moieties play a crucial role, challenging the conventional belief of catechol-dominated adhesion. The high adhesion strength of polydopamine (PDA) is attributed to the abundant yield of DHI moieties achieved through oxidation and cyclization during self-polymerization, suggesting that substituent chemistry and self-polymerization can govern adhesion in mussel-inspired materials.
Article
Chemistry, Analytical
Wasinee Pholauyphon, Ravindra N. Bulakhe, Jedsada Manyam, Insik In, Peerasak Paoprasert
Summary: In this study, the electrochemical performance of a nanocomposite composed of TiO2 nanoparticles and carbon dots (CDs) derived from sodium polyacrylate was investigated. The addition of CDs to both the electrode and the electrolyte resulted in a significant enhancement of the specific capacitance, attributed to the synergistic effects of reducing series resistance, enhancing surface wettability, diffusion-controlled contribution, and pathways for ion diffusion. This strategy shows promise for developing high-performance, stable, and cost-effective energy storage devices.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Shrikant Sadavar, Navnath S. Padalkar, Rohini B. Shinde, Saji T. Kochuveedu, Umakant M. Patil, Akash S. Patil, Ravindra N. Bulakhe, Chandrakant D. Lokhande, Insik In, Rahul R. Salunkhe, Jayavant L. Gunjakar
Summary: An exfoliation-reassembling process was used to develop mesoporous intercalative nanohybrids of cationic 2-D cobalt-chromium-layered double hydroxide nanosheets and polyoxovanadate anions, which exhibited promising performance in asymmetric supercapacitors devices.
JOURNAL OF POWER SOURCES
(2022)
Article
Nanoscience & Nanotechnology
G. Murali, Miyeon Lee, Jeevan Kumar Reddy Modigunta, Byungin Kang, Jiyeong Kim, Eunji Park, Hansol Kang, Jihoon Lee, Young Ho Park, Sung Young Park, Insik In
Summary: A simple, cheap, and environmentally friendly method was developed to fabricate antibacterial plastic films or fibers. This method involves decorating silver nanoparticles (AgNPs) on ultraviolet-ozone (UVO)-treated plastic films or fibers by dipping them into a silver nitrate solution. The AgNP-coated plastics show strong adhesion ability and high bactericidal activity, making them suitable for various applications in biological and environmental fields.
ACS APPLIED NANO MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
G. Murali, Binhee Kwon, Hansol Kang, Jeevan Kumar Reddy Modigunta, Seongmin Park, Seongeun Lee, Hwiyoung Lee, Young Ho Park, Juhea Kim, Sung Young Park, Young-Jin Kim, Insik In
Summary: The direct use of conventional photosensitizers in photodynamic therapy (PDT) of cancer cells is hindered by their limitations in solubility, photostability, and aggregation tendency. To overcome these challenges, this study presents a facile method to encapsulate hematoporphyrin (HP) photosensitizer in carbon quantum dots (CQDs) through a one-step microwave reaction. The resulting HP-CQDs exhibit excellent solubility in water and high reactive oxygen species generation ability under deep red light, making them suitable for PDT-assisted eradication of human breast cancer cells (MCF-7).
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Chandrakalavathi Thota, Jeevan Kumar Reddy Modigunta, Maddaka Reddeppa, Young Ho Park, Hyejin Kim, Hansol Kang, Samanth Kokkiligadda, Seongeun Lee, G. Murali, Sung Young Park, Insik In
Summary: In this study, a light-activated gas sensor utilizing carbon quantum dots and silver nanoparticles was successfully developed. By controlling the flow direction of photogenerated electrons and utilizing excellent oxygen dissociation ability, the sensor exhibited exceptional selectivity and sensitivity towards hydrogen sulfide gas, enabling detection at low concentrations.
Article
Chemistry, Multidisciplinary
Tae Yun Ko, Daesin Kim, Seon Joon Kim, Hyerim Kim, Arun S. Nissimagoudar, Seung-Cheol Lee, Xiaobo Lin, Peter T. Cummings, Sehyun Doo, Seongmin Park, Tufail Hassan, Taegon Oh, Ari Chae, Jihoon Lee, Yury Gogotsi, Insik In, Chong Min Koo
Summary: The article introduces a novel ligand chemistry for MXenes using alkylated 3,4-dihydroxy-L-phenylalanine (ADOPA), which can functionalize MXene surfaces under mild reaction conditions. The ADOPA ligands form strong hydrogen-bonding and pi-electron interactions with the surface terminal groups of MXenes, while the hydrophobic fluorinated alkyl tail is compatible with organic solvents. This method produces stable colloidal solutions and liquid crystals of various MXenes in organic solvents, with excellent electrical conductivity, improved oxidation stability, and processability, enabling applications in flexible electrodes and electromagnetic interference shielding.
Article
Chemistry, Multidisciplinary
Heqing Ye, Eunji Park, Su Cheol Shin, G. Murali, Daehyun Kim, Jihoon Lee, In Ho Kim, Sung-Jin Kim, Se Hyun Kim, Yong Jin Jeong, Insik In
Summary: In this study, two types of UV curable high-k PSQs with different side chains were prepared. The structure of the side chains influenced the UV curing behavior and capacitance characteristics of the PSQ dielectrics. These findings demonstrate the potential of engineering PSQs for next generation integrated electronics.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Kaustuv Roy, Dong-Hyun Lee, Benny Ryplida, Insik In, Suk Ho Bhang, Sung Young Park
Summary: This research proposes a cancer-selective self-reporting sensor based on a redox-responsive mineralized conductive hydrogel (M-Hydrogel), which possesses cancer-specific viscosity, adhesive strength, stretchability, tunable conductivity, and fluorescence. The self-reporting nature of the M-Hydrogel sensor is highlighted when in the vicinity of a high glutathione (GSH) level, confirming the dependence of self-recognizable behavior on the cancer microenvironment. The M-Hydrogel demonstrates excellent ex situ sensing with tumor ablation, enabling real-time analysis coupled with the upregulation of pro-apoptotic markers P53 and BAX in the tumor.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Physics, Applied
C. Thota, G. Murali, R. Dhanalakshmi, M. Reddeppa, N. -H. Bak, G. Nagaraju, S. -G. Kim, J. K. R. Modigunta, Y. H. Park, Insik In, M. -D. Kim
Summary: In this study, 2D MXene nanosheets were spin-coated on 1D GaN nanorods to establish a van der Waals Schottky junction for efficient UV detection. The built-in electric field developed through this junction formation enhances the separation of electron-hole pairs, resulting in better UV detection performance compared to pristine GaN nanorods.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Environmental
Hyeong Jun Jo, Gwang-Bum Im, Akhmad Irhas Robby, Insik In, Suk Ho Bhang, Arnab Shit, Sung Young Park
Summary: The study introduces a cancer microenvironment-selective detection system using wireless pressure and strain sensing from a ROS-responsive carbon dot-embedded conductive hydrogel. The hydrogel's ROS scavenging activity and photothermal therapy eliminate tumor condition, and the hydrogel produces distinct electronic signals in the presence of cancer cells. The wireless sensor device allows for easy monitoring of conductivity and pressure on cellphones. Overall, this theragnostic sensor with direct anticancer activity via photothermal therapy is successfully constructed.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Young Ho Park, Dongyun Kim, Chaitanya B. Hiragond, Junho Lee, Jin-Woo Jung, Chang-Hee Cho, Insik In, Su-Il In
Summary: This study developed a highly stable photocatalyst for the reduction of CO2 to CO. By combining phase-controlled molybdenum sulfide with reduced titania, the obstacles of limited light absorption and poor charge separation were overcome, resulting in selective conversion of CO2.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Chemistry, Multidisciplinary
Ari Chae, G. Murali, Seul-Yi Lee, Jeonghwan Gwak, Seon Joon Kim, Yong Jin Jeong, Hansol Kang, Seongmin Park, Albert S. Lee, Dong-Yeun Koh, Insik In, Soo-Jin Park
Summary: Recently, MXene-based wearable hydrogels have become promising candidates for epidermal sensors due to their softness and unique properties. However, it is challenging to achieve reliable sensing performance and prolonged service life due to MXene oxidation in water-containing hydrogels. To address this issue, catechol-functionalized poly(vinyl alcohol) (PVA-CA)-based hydrogels are proposed to inhibit MXene oxidation, resulting in rapid self-healing and superior strain sensing behaviors. The PVA-CA-MXene hydrogel demonstrates potential for real-time motion monitoring and accurate signal classification using deep learning models.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Soyeon Kim, Canh Minh Vu, Suehyeun Kim, Insik In, Jihoon Lee
Summary: This study presents a facile strategy to improve the mechanical flexibility and electromagnetic interference (EMI) shielding of MXene films. The MX@DC film, created by crosslinking mussel-inspired molecule DC with MXene nanosheets, exhibited significantly enhanced toughness and Young's modulus compared to bare MXene films. The DC-coated MXene film also demonstrated improved EMI shielding effectiveness, making it suitable for practical applications.
Article
Nanoscience & Nanotechnology
Chandrasekaran Nithya, Jeevan Kumar Reddy Modigunta, Insik In, Soye Kim, Sukumaran Gopukumar
Summary: Hierarchical nanocomposites with surface active bonding features are efficient electrode materials for high-performance Li-/Na-/K-ion batteries. Tuning the physiochemical properties of these nanocomposites has a great impact on their electrochemical performance, attributed to the synergistic effect of different components. In this study, a hierarchical nanocomposite of bismuth sulfide (Bi2S3) nanorod bonded to reduced graphene oxide (rGO) matrix was synthesized and investigated as an anode material for potassium-ion batteries. The nanocomposite exhibited high reversible capacity, long-term cycling stability, and outstanding rate capability. The excellent performance was attributed to the active sites in rGO nanosheets that enhance electrical conductivity of Bi2S3 nanorods and prevent shuttle effect of polysulfide. The proposed phase transformation mechanism and structural stability of Bi2S3 nanorods were confirmed by ex-situ X-ray diffraction and high-resolution transmission electron microscopy analysis respectively. The surface dominated pseudocapacitive K-ion storage also played a major role in improving the electrochemical performance. A K-ion full cell was successfully assembled and showed stable cycling performance after 100 cycles at 1 C rate.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Multidisciplinary
Tae Min Kim, Hyun Jeong Won, Jun-Ho Yang, Hayeon Jo, A. Hyeon Kim, Dohyun Nam, Seul Gi Kim, Eun-Jung Jin, Heung Jin Bae, Sung Young Park
Summary: A biocompatible hair-dyeing technology using a dark polyphenol complex (DPC) was developed in this study. The DPC enhanced the stability of hair coating and its ability to scavenge reactive oxygen species (ROS), resulting in improved hair properties and mechanical strength. The multicolor S-DPC exhibited antioxidant properties and high biocompatibility, making it a promising biomaterial for hair dyeing applications.
