Article
Engineering, Electrical & Electronic
Miao Sun, Shuangshuang Zhang, Zhenhong Jia, Xiaoyi Lv, Xiaohui Huang
Summary: The proposed biological detection device assembled with porous silicon and Bragg structures greatly improves sensitivity and detection limit, offering advantages of high detection sensitivity, label-free operation, and low cost.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Physical
Chandra Prakash Verma, K. Asokan, Pawan K. Kanaujia, Mohammad Adnan, D. Kanjilal, G. Vijaya Prakash
Summary: In this study, low-energy Ar+ ion beam irradiation on PSi microcavities resulted in a red-shift in the reflectance spectra of resonant cavities and modification of crystalline silicon structure. Experimental findings were in agreement with simulations, providing evidence for tuning optical properties and photon confinement within the microcavity.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Chandra Prakash Verma, K. Asokan, D. Kanjilal, G. Vijaya Prakash
Summary: This study demonstrates that the optical properties of porous silicon (PSi) based optical microcavities can be tunable by energetic oxygen (O) ion irradiation, resulting in significant changes suitable for optoelectronic applications.
Article
Chemistry, Analytical
Dashananda Nanda Kumar, Zina Baider, Daniel Elad, Shlomo E. Blum, Giorgi Shtenberg
Summary: This study presents a simple, highly sensitive, and label-free optical biosensor for real-time detection of BoNT serotype C. The optical biosensor showed a linear response within the range of 10 to 10,000 pg mL(-1) with a detection limit of 4.8 pg mL(-1). The developed assay demonstrates potential for rapid bio-diagnosis of BoNT, with specificity and selectivity validated using an adjacent holotoxin relevant for farm animals (BoNT serotype D).
Article
Physics, Applied
Chandra Prakash Verma, Mohammad Adnan, P. Srivastava, K. Asokan, D. Kanjilal, G. Vijaya Prakash
Summary: The study demonstrates the tuning of optical characteristics of porous silicon-based microcavities through N ion beam interactions, showing significant red-shifting in resonance cavity mode due to ion interaction. The experimental results are in good agreement with simulations, and the use of ion beams is effective in producing wider tunable optical properties suitable for photonic applications in microcavities.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Review
Chemistry, Analytical
Rosalba Moretta, Luca De Stefano, Monica Terracciano, Ilaria Rea
Summary: This review summarizes the leading advancements in porous silicon (PSi) optical-biosensors achieved over the past five years, highlighting the cost-effective fabrication process, high internal surface area, tunable pore size, and photonic properties. Different optical PSi biosensors are classified into four classes based on the biorecognition elements immobilized on the surface, with discussions on PL signal modulation and effective refractive index changes as the main optical transduction mechanisms. Additionally, common approaches for chemically stabilizing and functionalizing the PSi surface are described.
Article
Chemistry, Analytical
Candida Anahy Cisneros-Covarrubias, Gabriela Palestino, Cesar F. A. Gomez-Duran, Sergio Rosales-Mendoza, Maria de Lourdes Betancourt-Mendiola
Summary: An optimized microwave-assisted method for chemical functionalization of porous silicon particles was proposed in this study, showing improved efficiency and reduced reaction time. The impact of microwave irradiation on surface coverage was found to be dependent on various factors, including the surface chemistry of PSip and reaction conditions.
ANALYTICAL METHODS
(2021)
Review
Chemistry, Analytical
Linda Bertel, David A. Miranda, Jose Miguel Garcia-Martin
Summary: TiO2 electrochemical biosensors offer high selectivity and sensitivity for biomolecules recognition, requiring understanding of signal extraction and transducer properties. This review provides an overview of nanostructured TiO2 biosensors fabrication methods, detection techniques, and biomolecule functionalization strategies based on relevant literature published in the last decade.
Article
Optics
M. Daniyal Ghauri, Syed Zajif Hussain, Ubaid Ullah, Rana M. Armaghan Ayaz, Rahman Shah Zaib Saleem, Alper Kiraz, M. Imran Cheema
Summary: Aflatoxin M1 (AFM1) is a carcinogenic compound commonly found in milk, especially in developing countries. Optical sensors show potential for accurate and rapid detection of AFM1, but current AFM1 sensing demonstrations using optical spectroscopy are still immature.
Article
Chemistry, Analytical
D. Nanda Kumar, Zina Baider, Daniel Elad, Shlomo E. Blum, Giorgi Shtenberg
Summary: This paper presents a reflective-based method for detecting and estimating the activity of BoNT/C. The method utilizes two adjacent porous Si Fabry-Pe 'rot interferometers to quantify minute BoNT/C concentrations and assess their endopeptidase activity. The optical assay is highly sensitive, and the specificity and selectivity of the method are validated. In real-life scenarios, the method demonstrates excellent compliance for complex media analysis.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Andres Perez-San Martin, Karina Uribe, Jacobo Hernandez-Montelongo, Nelson Naveas, Miguel Manso-Silvan, Patricio Oyarzun, Victor Diaz-Garcia, Braulio Contreras, Gonzalo Recio-Sanchez
Summary: This study investigated the antibacterial activity of Laureliopsis philippiana essential oil and its release performance on different surface-functionalized nanostructured porous silicon (nPSi). The results showed that the essential oil had a high inhibitory effect on Staphylococcus aureus and Klebsiella pneumoniae. The essential oil was successfully loaded onto various functionalized nPSi, and the release was controlled using a quasi-Fickian diffusion mechanism. Functionalized nPSi-APTS and nPSi-UAc structures demonstrated a more controlled release of the essential oil compared to other functionalizations, increasing its availability and exposure to the environment.
APPLIED SCIENCES-BASEL
(2022)
Article
Nanoscience & Nanotechnology
Reuven Gordon
Summary: This article introduces the optical trapping technique with nanostructured metals, which enables label-free tether-free analysis of single proteins and their interactions. The article discusses the historical background of the technique, recent advances, and the potential for its application in areas such as biologics, drug discovery, and fundamental biophysical studies.
Article
Materials Science, Ceramics
Joakim Riikonen, Jimi Rantanen, Rinez Thapa, Nguyen T. Le, Severinne Rigolet, Philippe Fioux, Petri Turhanen, Nelli K. Bodiford, Jhansi R. Kalluri, Timo Ikonen, Tuomo Nissinen, Benedicte Lebeau, Jouko Vepsalainen, Jeffery L. Coffer, Vesa-Pekka Lehto
Summary: A fast and scalable method for producing nanostructured SiC from plant materials through magnesiothermic reduction was developed in this study, resulting in SiC with a crystallite size below 10nm and a high surface area. This approach paves the way for large-scale production of nanostructured SiC using renewable resources and also demonstrates the use of SiC as a metal adsorbent in applications such as wastewater remediation.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Review
Materials Science, Multidisciplinary
Hashim Alhmoud, Daniel Brodoceanu, Roey Elnathan, Tobias Kraus, Nicolas H. Voelcker
Summary: Metal-assisted chemical etching (MACE) offers control over size, shape, and porosity of porous silicon nanostructures in a single step, making them suitable as biomaterials. The simplicity and flexibility of MACE are advantages, but the complexity of reaction parameters and lack of a complete model hinder rational design. Current understanding of the MACE reaction mechanism still contains uncertainties.
PROGRESS IN MATERIALS SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Timothy C. Siu, M. Imex Aguirre Cardenas, Jacob Seo, Kirllos Boctor, Miku G. Shimono, Isabelle T. Tran, Veronica Carta, Timothy A. Su
Summary: The first syntheses of functionalized sila-adamantanes via site-selective reactions are described. Mechanistic inquiry into the isomerization of sila-adamantane revealed new approaches for installing halides at the 2-position of the cluster. Optical absorbance and density functional theory studies show that sigma-withdrawing substituents at the 1-position strongly perturb optical absorbance in sila-adamantane.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Materials Science, Multidisciplinary
Oscar Marin, Ana Maria Gennaro, Monica Tirado, Roberto R. Koropecki, David Comedi
Article
Chemistry, Analytical
E. Osorio, R. Urteaga, H. Juarez, R. R. Koropecki
SENSORS AND ACTUATORS B-CHEMICAL
(2015)
Article
Physics, Condensed Matter
Oscar Marin, Victor Toranzos, Raul Urteaga, David Comedi, Roberto R. Koropecki
SUPERLATTICES AND MICROSTRUCTURES
(2015)
Article
Physics, Condensed Matter
Oscar Marin, Gustavo Grinblat, Ana Maria Gennaro, Monica Tirado, Roberto R. Koropecki, David Comedi
SUPERLATTICES AND MICROSTRUCTURES
(2015)
Correction
Materials Science, Multidisciplinary
F. A. Garces, N. Budini, J. A. Schmidt, R. D. Arce
Article
Materials Science, Multidisciplinary
F. A. Garces, N. Budini, J. A. Schmidt, R. D. Arce
Article
Nanoscience & Nanotechnology
Leandro N. Acquaroli, Pascal Newby, Clara Santato, Yves-Alain Peter
Article
Physics, Applied
L. G. Cencha, C. Antonio Hernandez, L. Forzani, R. Urteaga, R. R. Koropecki
JOURNAL OF APPLIED PHYSICS
(2018)
Article
Physics, Applied
L. Forzani, C. A. Ramos, E. Vassallo Brigneti, A. M. Gennaro, R. R. Koropecki
APPLIED PHYSICS LETTERS
(2019)
Article
Materials Science, Multidisciplinary
X. Leon, A. M. Gennaro, P. M. Rodi, L. Forzani, M. Pacio, H. Juarez, E. Osorio, R. R. Koropecki
Article
Physics, Applied
L. Forzani, A. M. Gennaro, R. R. Koropecki, C. A. Ramos
APPLIED PHYSICS LETTERS
(2020)
Article
Physics, Applied
Jorge Caram, Marise Garcia-Batlle, Osbel Almora, Roberto D. Arce, Antonio Guerrero, Germa Garcia-Belmonte
APPLIED PHYSICS LETTERS
(2020)
Article
Physics, Applied
Jorge Caram, Maximiliano Senno, Luisa Cencha, Silvia Tinte, Raul Urteaga, Roberto D. Arce
Summary: In this study, we propose a simple and efficient method for characterizing the optical and morphological properties of perovskite films. This method provides qualitative and quantitative morphological information, and can help optimize film deposition.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
L. Forzani, C. Antonio Hernandez, L. G. Cencha, H. Juarez Santiesteban, R. R. Koropecki, R. Urteaga
Summary: The study found that normal incidence birefringence in AAO is influenced by different crystal orientations of the aluminum substrate, which is important for the optical performance of optical devices. By using a simple thermo-mechanical treatment, better crystalline regions can be obtained to reduce the impact of birefringence. A simple model for elliptical section pores was proposed to quantitatively explain the origin of normal incidence birefringence in AAO.
Article
Chemistry, Multidisciplinary
Edith Osorio, Jose G. Sanchez, Leandro N. Acquaroli, Mauricio Pacio, Josep Ferre-Borrull, Josep Pallares, Lluis F. Marsal