Article
Chemistry, Physical
Zachary J. Woessner, Alexander N. Chen, Sara E. Skrabalak
Summary: Metal nanoparticles with different Au-Pd distributions were prepared and studied to evaluate the effect on refractive index sensitivity (RIS). It was found that the localization of Pd at LSPR hotspots is critical for achieving the highest RIS, with Pd-tipped Au octopods displaying the highest RIS and maintaining a moderate figure of merit. These findings emphasize the importance of Pd distribution in Au-Pd heterostructures for designing future LSPR sensors beyond the standard all-Au structures.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Nanoscience & Nanotechnology
Ahmed E. ElMetwally, Mostafa Saad Sayed, Jae-Jin Shim, Marc R. Knecht, Leonidas G. Bachas
Summary: In this study, plasmonic Au nanoparticles were used to enhance the photocatalytic activity of BiVO4/BiOBr nanosheets through surface plasmonic resonance. The highest conversion of benzyl alcohol (100%) and the maximum yield of benzaldehyde (99%) were achieved using BiVO4/BiOBr/Au 3% after 4 hours of irradiation. Singlet oxygen was identified as the dominant species responsible for the photocatalytic oxidation of benzyl alcohol to benzaldehyde. The proposed mechanism involved the excitation of electrons in BiVO4/BiOBr/Au to singlet states, which eventually produced triplet excitons and reacted with dissolved O2 to generate singlet oxygen. The thermodynamic analysis indicated that the reaction was favorable.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Hao Tang, Zi Ang Chen, Muchen Wu, Shunbo Li, Ziran Ye, Mingjia Zhi
Summary: Size tuning of Au nanoparticles in Au-CeO2 composite aerogels was achieved by adding a mixed organic acid additive containing a thiol group during the gelation step. The obtained aerogel photocatalysts consist of interconnected CeO2 nanoparticles and Au nanoparticles with varying sizes, leading to changes in the surface plasmon resonance peak position and intensity. Photocatalytic CO2 reduction revealed that the addition of Au nanoparticles enhances the activity of the CeO2 aerogel photocatalyst, with different sizes of Au nanoparticles affecting the degree of enhancement and product selectivity.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Multidisciplinary
Antonio Carone, Pablo Mariani, Anthony Desert, Marco Romanelli, Jacopo Marcheselli, Marco Garavelli, Stefano Corni, Ivan Rivalta, Stephane Parola
Summary: Chiral plasmonic nanomaterials have promising applications. This study expands the range of available chiral plasmonic nanostructures and proposes the importance of the outer part of the nanoparticles shell on plasmonic circular dichroism.
Article
Chemistry, Multidisciplinary
Amit Sharma, Jonathan Amodeo, Nimrod Gazit, Yuanshen Qi, Olivier Thomas, Eugen Rabkin
Summary: This study demonstrates that coating single crystalline Ag nanoparticles with a thin polycrystalline Au layer weakens the particles and leads to more homogeneous deformation. The research further reveals that particle weakening at low strains is attributed to the plasticity confinement in the polycrystalline shell, while at higher strains it is initiated by the plasticity within the Ag core.
Article
Chemistry, Physical
Ajay Kumar, Priyanka Choudhary, Venkata Krishnan
Summary: Chemical processes using heterogeneous photocatalytic systems are widely used for the synthesis of valuable fine chemicals. In this study, plasmonic Au nanoparticles dispersed over TiO2 photocatalyst with different phases of TiO2 have been synthesized and showed efficient and selective oxidation of benzyl alcohol to benzaldehyde under visible light irradiation using a green solvent.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Hiba Abbas Widatalla, Layla Fathi Yassin, Ayat Ahmed Alrasheid, Shimaa Abdel Rahman Ahmed, Marvit Osman Widdatallah, Sahar Hussein Eltilib, Alaa Abdulmoneim Mohamed
Summary: The use of silver nanoparticles (AgNPs), with their antiviral, antifungal, anti-inflammatory, and anticancer activities, is of great importance in nanomedicine. In this study, AgNPs were synthesized using a nontoxic and ecofriendly method with green tea leaf extract as a reducing agent. The synthesized AgNPs showed antibacterial activity against Staphylococcus aureus and Klebsiella sp., indicating their potential as an antimicrobial agent.
NANOSCALE ADVANCES
(2022)
Article
Chemistry, Physical
Jieun Shin, Sungwoo Lee, Sungjae Yoo, Insub Jung, Soohyun Lee, Jeongwon Kim, Jiwoong Son, Ji-Eun Kim, Jae-Myoung Kim, Jwa-Min Nam, Sungho Park
Summary: To enhance the near-field focusing around nanoscale metal particles, we designed large-sized gold double nanorings with nanoscale gaps between them. These gaps resemble hot halos where single-particle surface-enhanced Raman scattering occurs. The synthesis of these gold nanohalos was achieved using a novel strategy based on hexagonal gold nanoplates as templates. The resulting nanohalos exhibited near-field focusing, confirmed by both experimental measurements and theoretical simulation. The study also revealed a correlation between the distances of intra-nanogaps and particle sizes of gold nanohalos on single-particle surface-enhanced Raman scattering, with high enhancement factors and reproducibility.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Ran Li, Can-Can Zhang, Dan Wang, Yan-Fang Hu, Yong-Long Li, Wei Xie
Summary: The study revealed that gold nanoparticles can change the pathway of photooxidation reactions, converting C-C triple bonds into carboxyl and acyl chloride groups, highlighting the important role of gold nanoparticles in photocatalysis.
CHINESE CHEMICAL LETTERS
(2021)
Article
Chemistry, Physical
Natalie Fehn, Ehsan Vahidzadeh, Karthik Shankar, Ueli Heiz, Aras Kartouzian
Summary: This study presents the surface second harmonic generation spectra of supported gold nanoparticles with titania coating, which can provide additional information on the morphology and size distribution of the sample.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Guangchao Zheng, Sulin Jiao, Wei Zhang, Shenli Wang, Qinghua Zhang, Lin Gu, Weixiang Ye, Junjun Li, Xiaochen Ren, Zhicheng Zhang, Kwok-yin Wong
Summary: Accurate research on the applications of chiral plasmonic metal nanoparticles with surface plasmon resonance (SPR) still face challenges. This study demonstrates the production of chiral plasmonic metal nanoparticles with tunable chiroptical activities. The results show that the chiral properties can be precisely tailored by adjusting the longitudinal SPR (LSPR) and the amount of gold nanorods as seeds. The functionalization of a shell of another metal or semiconductor can also achieve a shift of the chiral properties within the UV-vis-NIR region. Chirality transfer from the gold core to the silver shell leads to new chiral properties in the near-UV region.
Article
Engineering, Electrical & Electronic
Hemant Ramakant Hegde, Santhosh Chidangil, Rajeev K. Sinha
Summary: This study presents the synthesis and surface immobilization of Au nanostars, Au nanocubes, and Au nanorods for refractometric sensing applications. The results demonstrate that Au nanostars with LSPR peak at 767nm exhibit the highest RI sensitivity among the tested nanostructures.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Environmental
Yi-Bai Sun, Miao Ni, Chen Chi, Dong-Rui Yang, Xue-Lu Chen, Qi Qi, Jian Li, Xing-Hua Xia
Summary: Researchers have developed a catalyst consisting of a single atomic Pd layer deposited on Au nanorods (MLPd@Au NRs) that exhibits a super-high hydrogen evolution reaction (HER) activity and ultra-low overpotential under localized surface plasmon resonance condition. The Au NR plays a triple determining role in HER performance by adjusting the electronic structure and lattice strain of Pd, reducing the adsorption energy of H-adatoms, eliminating the penetration of H adatoms in multilayer Pd crystal, and providing high energetic hot charge carriers under near-IR light irradiation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Gautham Kumar, Ganesh D. Sharma, FANG-CHUANG CHEN
Summary: Organic semiconductors are gaining attention in solar energy applications due to their high absorption coefficients, mechanical flexibility, solution processability, and low material costs. Although the power conversion efficiencies of organic-based solar cells have been rapidly improving, they still need further enhancements to compete with inorganic devices. The use of Au-Cu alloy nanoparticles to trigger localized surface plasmon resonance shows promising improvements in device performance without compromising stability.
OPTICAL MATERIALS EXPRESS
(2021)
Review
Crystallography
Gajendra Kumar Inwati, Virendra Kumar Yadav, Ismat Hassan Ali, Shakti Devi Kakodiya, Nisha Choudhary, Bharat A. Makwana, Chhagan Lal, Krishna Kumar Yadav, Bijendra Singh, Saiful Islam, Simona Cavalu
Summary: This study explores the improved physicochemical characteristics of metal substrate (Ag, Au) based composite nanoparticles, and their applications in pharmaceuticals, optoelectronics, and environmental impact. It discusses the insights of Ag and Au NPs-based nanomaterials, including production, physicochemical, and biotechnological characteristics. The customizable form, scale, and surface modification of Ag and Au NPs, as well as their plasmon capacities, are highlighted. The study also reveals the effective interaction dynamics of Ag and Au implanted nanomaterials with dopants/defects ratios in stimulating pathogens and interrupting biochemical reactions.
Article
Chemistry, Physical
Lakshi Saikia, Diganta Bhuyan, Mrinal Saikia, Banajit Malakar, Dipak Kumar Dutta, Pinaki Sengupta
APPLIED CATALYSIS A-GENERAL
(2015)
Article
Microbiology
Shruti Talukdar, Madhumita Talukdar, Manorama Buragohain, Archana Yadav, R. N. S. Yadav, T. C. Bora
Article
Chemistry, Applied
Archana M. Das, Manash P. Hazarika, Monmi Goswami, Archana Yadav, Pradip Khound
CARBOHYDRATE POLYMERS
(2016)
Article
Biotechnology & Applied Microbiology
M. Talukdar, M. Bordoloi, P. P. Dutta, S. Saikia, B. Kolita, S. Talukdar, S. Nath, A. Yadav, R. Saikia, D. K. Jha, T. C. Bora
JOURNAL OF APPLIED MICROBIOLOGY
(2016)
Article
Green & Sustainable Science & Technology
Paranjoli Boruah, Pallavi Dowarah, Rupjyoti Hazarika, Archana Yadav, Pranab Barkakati, Tridip Goswami
JOURNAL OF CLEANER PRODUCTION
(2016)
Article
Plant Sciences
Rajal Debnath, Archana Yadav, Vijai K. Gupta, Bhim P. Singh, Pratap J. Handique, Ratul Saikia
FRONTIERS IN PLANT SCIENCE
(2016)
Article
Chemistry, Applied
N'guadi Blaise Allou, Archana Yadav, Mintu Pal, Rajib Lochan Goswamee
CARBOHYDRATE POLYMERS
(2018)
Article
Biochemistry & Molecular Biology
Debjani Baruah, Monmi Goswami, Raj Narayan Singh Yadav, Archana Yadav, Archana Moni Das
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
(2018)
Article
Chemistry, Applied
Rumi Kotoky, Manobjyoti Bordoloi, Archana Yadav, Kashyap J. Tamuli, Surovi Saikia, Partha P. Dutta, Prodip P. Khound, Siddhartha P. Saikia
NATURAL PRODUCT RESEARCH
(2019)
Article
Multidisciplinary Sciences
Juthika Saikia, Rupak K. Sarma, Rajashree Dhandia, Archana Yadav, Rupjyoti Bharali, Vijai K. Gupta, Ratul Saikia
SCIENTIFIC REPORTS
(2018)
Article
Pharmacology & Pharmacy
Nguadi Blaise Allou, Jitu Saikia, Polakshi Bordoloi, Archana Yadav, Mintu Pal, Rajib Lochan Goswamee
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
(2019)
Article
Biochemistry & Molecular Biology
Debjani Baruah, Raj Narayan Singh Yadav, Archana Yadav, Archana Moni Das
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
(2019)
Article
Environmental Sciences
Pooja Talukdar, Palakshi Bordoloi, Priyankush Protim Bora, Archana Yadav, Ratul Saikia, Sachin Rameshrao Geed
Summary: The present study investigated the biodegradability of oily sludge using a bacterial consortium isolated from petroleum-contaminated sites. Lab scale composting experiments showed that a combination of 10% oily sludge exhibited the highest carbon removal of 40.33% within 90 days. To further enhance biodegradation, a slurry bioreactor was used, achieving maximum petroleum hydrocarbon removals of 48.8% and 46.5% on the 78th and 140th days respectively. The results contribute to the development of sustainable and eco-friendly treatment methods for petroleum waste.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Environmental
Priyakshree Borthakur, Najrul Hussain, Gitashree Darabdhara, Puma K. Boruah, Bhagyasmeeta Sharma, Prandeep Borthakur, Archana Yadav, Manash R. Das
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2018)
Article
Engineering, Environmental
Bhagyasmeeta Sharma, Puma K. Boruah, Archana Yadav, Manash R. Das
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2018)
