Article
Materials Science, Multidisciplinary
J. E. Ortega-Valencia, J. Oliva-Ramirez, O. Garcia-Barradas, M. Jimenez-Fernandez, G. H. Rosas-Saito, J. E. Oseguera-Pena, D. V. Melo-Maximo
Summary: This study developed an immunosensor using quartz crystal microbalance (QCM) to detect Salmonella typhimurium, with gold nanoparticles as signal enhancers. The effect of gold nanoparticle size was explored to determine the optimal size for enhancing the detection signal.
Article
Physics, Applied
Dandan Yang, Jianrong Qiu, Guoping Dong
Summary: This article explores the characteristics and applications of rare-earth ion-doped upconversion micro/nanoparticles, emphasizing the importance of single-particle spectroscopic techniques in UC materials research and the challenges for future studies.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Ilya E. Kolesnikov, Elena Afanaseva, Mikhail A. Kurochkin, Elena Vaishlia, Alexey A. Kalinichev, Evgenii Yu Kolesnikov, Erkki Lahderanta
Summary: This study successfully applied LuVO4:Nd3+/Yb3+ nanophosphors for temperature measurements and investigated the effects of different dispersion systems and Yb3+ doping concentrations on the thermometric performance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Tsung-Han Ho, Shuo-Yang Hong, Chien-Hsin Yang, Yih-Fung Chen, Hung-Yin Lin, Tzong-Liu Wang
Summary: Two kinds of ligand-free UCNPs were successfully synthesized for studying ROS generation in PDT. The results showed that the ligand-free UCNPs exhibited more pronounced ROS generation compared to the oleate-capped UCNPs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Ruth Abramson, Hannah Wilson, Marta M. Natile, Louise S. Natrajan
Summary: The ferrozine (FZ) assay is an important oxidation state-specific colorimetric assay for the quantification of Fe2+ ions in environmental samples. In this article, for the first time, it is paired with upconverting luminescent nanomaterials to detect Fe2+ using the inner filter effect. The results show low detection limits and the capability of detecting micromolar concentrations of Fe2+ in turbid solutions.
Article
Chemistry, Multidisciplinary
Ondrej Pavelka, Sergey Dyakov, Klaudia Kvakova, Jozef Vesely, Petr Cigler, Jan Valenta
Summary: Photoluminescent gold nanoclusters are considered as a promising candidate for biosensing and bioimaging applications. However, their near infrared emission is relatively weak compared to the best fluorophores. This study contributes to the ongoing debate on improving the performance of gold nanoclusters by combining them with plasmonic nanostructures.
Article
Chemistry, Analytical
Hyun Jung Min, Hansel A. Mina, Amanda J. Deering, J. Paul Robinson, Euiwon Bae
Summary: In this study, the demonstration of a Salmonella Typhimurium detection system using a quartz crystal microbalance (QCM) biosensor and signal enhancement by gold nanoparticles was shown. The system showed good response and specificity for the detection of Salmonella Typhimurium, and the sensitivity was improved through signal amplification with gold nanoparticles.
Review
Biochemistry & Molecular Biology
Manoj Kumar Mahata, Ranjit De, Kang Taek Lee
Summary: The article reviews the progress and potential of lanthanide-doped upconverting nanoparticles in biomedical applications, focusing on their applications in optogenetics, oncotherapy, bioimaging, etc. The unique properties of UCNPs make them accurate, sensitive, multifunctional nanoprobes, leading to significant advancements in therapy and diagnosis. Emerging bioapplications and challenges in clinical translation of UCNP-based nanotechnology research are also discussed.
Article
Chemistry, Multidisciplinary
Eduardo D. Martinez, Ali F. Garcia-Flores, Albano N. Carneiro Neto, Carlos D. S. Brites, Luis D. Carlos, Ricardo R. Urbano, Carlos Rettori
Summary: Recent observations have shown that photon upconversion in small rare-earth-doped nanoparticles is thermally modulated in an anomalous manner, with thermal enhancement of emission intensity linked to the role of adsorbed water molecules as surface quenchers. The surface capping of particles directly influences the thermal dynamics of water adsorption and desorption, thereby affecting optical properties. These findings are important for understanding luminescence in nanoparticles and the interaction between surface and volume effects, with potential applications in nanothermometry, bioimaging, and optical encoding systems.
Article
Chemistry, Multidisciplinary
Mannu Kaur, Gabrielle A. Mandl, Steven L. Maurizio, Gabriella Tessitore, John A. Capobianco
Summary: Dye sensitization is a promising method to enhance luminescence from lanthanide-doped upconverting nanoparticles by improving photon harvesting capability through the use of dye molecules with higher absorption coefficients. However, the poor photostability of NIR dyes may limit their application. Thorough spectroscopic evaluations comparing dye-sensitized and non-dye sensitized LnUCNPs are crucial for quantifying the improvements achieved by dye sensitization.
NANOSCALE ADVANCES
(2022)
Article
Optics
A. V. Tcibulnikova, N. A. Myslitskaya, V. A. Slezhkin, V. V. Bruykhanov, I. G. Samusev, I. I. Lyatun
Summary: This paper presents a study on the cooperative luminescence process of Yb2O3 with gold nanoparticles on the surface of anodized titanium. The results show that the presence of gold nanoparticles increases the quantum yield of luminescence, and this enhancement is attributed to non-radiative plasmon energy transfer. It is also observed that under photoexcitation at low temperatures, the intensity of upconversion luminescence follows a quadratic dependence on the excitation energy, indicating the involvement of simultaneous energy transfer between two Yb3+ ions.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Physical
Julija Grigorjevaite, Arturas Katelnikovas
Summary: This study reports the synthesis and optical properties investigation of solely Tm3+ doped and Yb3+/Tm3+ co-doped K2Gd(PO4)(WO4) phosphors. It was found that under UV excitation, phosphors emitted in the blue spectral area regardless of the presence or absence of Yb3+. However, a very strong deep-red emission was observed when Yb3+ and Tm3+-containing samples were excited with a 980 nm wavelength laser. Interestingly, the sample with 20% Yb3+ and 0.5% Tm3+ dopants showed the highest upconversion emission in the UV/Visible range, while the sample with 20% Yb3+ and 2% Tm3+ dopants showed the most intensive upconversion emission band in the NIR range.
Article
Chemistry, Analytical
Quan-Quan Zhuang, Shao-Bin He, Yan-Cheng Jiang, Kai-Yuan Huang, Ying-Ying Xu, Hua-Ping Peng, Hao-Hua Deng, Wei Chen
Summary: This study presents a non-complex strategy for sensitive, quantitative, and rapid detection of Salmonella typhimurium with high specificity. The method utilizes fluorescent anti-Salmonella typhimurium IgG-AuNC to agglutinate Salmonella typhimurium on a glass slide, which is then observed using a fluorescence microscope. Under optimized conditions, the assay has a wide determination range, low detection limit, and fast response time.
Article
Chemistry, Analytical
Qiujun Lu, Lingling Xie, Shuhang Yin, Feng Chen, Cuiyan Wu, Meiling Liu, Haitao Li, Youyu Zhang
Summary: A novel luminescent nanosensor for ultrasensitive detection of miRNA-10b has been developed, which shows great promise for early diagnosis of hepatocellular carcinoma (HCC) due to its high sensitivity and selectivity.
Article
Chemistry, Physical
Preeti Padhye Kulkarni, Kishor H. Gavhane, Mahesh S. Bhadane, Vasant N. Bhoraskar, Shailendra S. Dahiwale, Sanjay D. Dhole
Summary: Hexagonal phase sodium yttrium fluoride activated with lanthanide ions; Tb3+, Eu3+ and Dy3+ doped NaYF4 phosphors were synthesized and their properties were studied under thermal annealing treatment. The NaYF4:Tb3+ phosphor annealed at 800°C demonstrated the most suitable thermoluminescence properties, with a linear response in the dose range of 1 kGy to 25 kGy of gamma radiation and negligible fading.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Spectroscopy
Zh. E. Ozbekova, A. A. Abdyldaev, A. A. Kulmyrzaev
Summary: This study compared two drying methods for cow and yak muscles, finding that freeze drying caused less discoloration. Additionally, analysis of fluorescence spectra allowed for accurate prediction of chemical composition and color characteristics of the muscles.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Leo Mandic, Ivan Ljubic, Iva Dzeba
Summary: In this study, a combined experimental and computational approach was used to investigate the photoexcitation and photodegradation mechanisms of Doxazosin (DOX). The results provide valuable insights into the primary events following the photoexcitation of DOX and its potential applications.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Xiufeng Wang, Yao Jin, Wenhui Ai, Siqi Wang, Zhiqing Zhang, Ting Zhou, Fang Wang, Guodong Zhang
Summary: This study successfully synthesized near infrared fluorescence Ag2S quantum dots (QDs) and developed a dual-mode sensor for sulfide anion using the excellent oxidase-like characteristics of manganese dioxide (MnO2) nanosheets. The sensor showed a wider detection range, higher sensitivity, and shorter reaction time, making it suitable for highly selective detection of sulfide in different concentration ranges.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yafei Li, Yanming Ma, Chuantao Zheng, Di Yu, Lien Hu, Shuo Yang, Fang Song, Yadan Li, Shuanghai Liu, Zhanrui Zhang, Yu Zhang, Yiding Wang, Frank K. Tittel
Summary: To effectively monitor gas explosion and coal spontaneous combustion in coal mine, an intrinsically safe and explosion-proof dual-gas sensor system was developed for methane (CH4) and carbon monoxide (CO) measurement. The system achieved different measurement ranges using laser scanning and gas cells, and improved stability and accuracy through gas pre-treatment and temperature compensation algorithm.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Pei-Rong Chen, Li-Kang Chu
Summary: In this study, the hydrates of glyoxal were investigated using infrared absorption spectrometry. The results showed that at low concentrations, glyoxal mainly exists as monomeric dihydrate. These findings provide suitable detection windows for further research on the roles of glyoxal and its hydrates in atmospheric and aerosol chemistry, as well as the relevant reaction kinetics.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Nichole O'Neill, Thamires A. Lima, Fabio Furlan Ferreira, Nicolas J. Alvarez, Reinhard Schweitzer-Stenner
Summary: This study determines the main fibril axis of GHG gel-forming fibrils using various techniques and compares the results with simulated data. The analysis suggests that the hydrophobic xz-surfaces of GHG fibrils could be a good target for the adsorption of hydrophobic drugs.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Mengyuan Liu, Hanchuang Zhu, Yikun Fang, Caiyun Liu, Xinke Li, Xiaohui Zhang, Lixue Ma, Kun Wang, Miaohui Yu, Wenlong Sheng, Baocun Zhu
Summary: ABHS is an efficient fluorescent probe that can accurately and sensitively detect Al3+ with strong resistance to interference. It also demonstrates excellent detection and imaging capabilities in complex real samples.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Ahmed S. El-Shafie, Evana Rahman, Yasser Gadelhak, Rehab Mahmoud, Marwa El-Azary
Summary: The recycling of waste mandarin peels into biochar (MRBC) has been used as a high performance and cost-effective adsorbent for treating polluted wastewater effluents. Batch adsorption studies were conducted to analyze the adsorption competency of MRBC on two dyes, methylene blue (MB) and basic fuchsin (BF), either in individual solutions or binary combinations. The results showed that MRBC was capable of effectively removing a high percentage of both dyes. However, the adsorption capacity decreased when the dyes were combined. The cost estimation of MRBC production and wastewater treatment indicated that both were relatively low.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Anindita Bhatta, Jahnabi Upadhyaya, Dipak Chamlagai, Lincoln Dkhar, Pynskhemborlang T. Phanrang, Mohan Rao Kollipara, Sivaprasad Mitra
Summary: Derivatives of thiazole-pyrazole fused benzo-coumarin compounds were synthesized and their photophysical properties were investigated. The synthesized coumarin compounds showed potential as therapeutic agents for Alzheimer's disease, inhibiting acetylcholinesterase activity. The presence of human serum albumin was found to affect the inhibition activity.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yongwei Duan, Quancheng Liu, Yiju Zhu, Qi Zhang, Xiaohui Duan, Hu Deng, Liping Shang
Summary: In this study, the phase transition of CL-20 was observed using terahertz spectroscopy, and quantum chemical calculations were employed to analyze the vibrations. The results indicated changes in the vibrations of CL-20 before and after phase transition.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yuefeng Gao, Sai Xu, Baojiu Chen
Summary: This study synthesized Cs2NaInCl6 nanocrystals co-doped with Sb3+ and Tb3+ ions as probes for copper ions detection in lubricating oil. The introduction of Sb3+ effectively reduced the band gap of the host material and enabled energy transfer pathway for Tb3+ emission. The doped Tb3+ ions resulted in the suppression of emission due to electron transfer. The Cs2NaInCl6: 2.5 %Sb3+, 40 %Tb3+ NCs exhibited superior sensitivity and selectivity for copper ions detection.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yu Liu, Yue Zhang, Changyao Liu, Ce Wang, Baocai Xu, Li Zhao
Summary: A highly sensitive detection platform for heparin was developed using a cationic fluorescent dye (cresyl violet acetate) as a fluorescence probe. The platform demonstrated high selectivity towards heparin and achieved detection in both HEPES solution and serum.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Lopamudra Roy, Nivedita Pan, Susmita Mondal, Ria Ghosh, Md. Nur Hasan, Neha Bhattacharyya, Soumendra Singh, Kallol Bhattacharyya, Arpita Chattopadhyay, Samir Kumar Pal
Summary: The study focuses on the interaction between reactive oxygen species (ROS) and a spectroscopic probe called Rose Bengal (RB), encapsulated in nanoscopic sodium dodecyl sulphate (SDS) micelles and entrapped in microscopic nylon 66 solid matrix. The research demonstrates efficient interaction between ROS and RB-SDS, and investigates the mechanism of hydroxyl radicals generation. Based on these findings, a prototype device utilizing RB embedded in a nylon thin film for quantification of ROS in extracellular fluids and food materials was developed.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Xiaosong Sun, Qihao Cui, Wenyue Dong, Qian Duan, Teng Fei
Summary: Conjugated porous polymers (CPPs) are promising sensing materials and their application in aqueous media is limited. In this study, we synthesized CPPs with porous structure and prepared nanoparticles, enabling efficient photoluminescence sensing of nitroaromatic explosives in aqueous phase.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Maria Cristina Caggiani, Germana Barone, Paolo Mazzoleni
Summary: Raman spectroscopy is commonly used for studying glassy materials in cultural heritage, but it is more difficult to interpret the spectra and apply the technique with portable instruments. In contrast, diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) can be used in archaeometric investigations as it is portable and non-invasive. However, there is limited application of this technique to historical glasses. This exploratory work demonstrates the potential of DRIFTS, in combination with portable X-ray Fluorescence (pXRF) and EDS microanalyses, for studying the composition and alteration of glass samples in cultural heritage.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)