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Ansari Z, Bhattacharya TS, Saha A, Sen K. Block copolymer mediated generation of bimetallic Ni-Pd nanoparticles: Raman sensors of ethyl paraben and ciprofloxacin. REACT FUNCT POLYM 2018. [DOI: 10.1016/j.reactfunctpolym.2018.01.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Mercurio M, Rossi M, Izzo F, Cappelletti P, Germinario C, Grifa C, Petrelli M, Vergara A, Langella A. The characterization of natural gemstones using non-invasive FT-IR spectroscopy: New data on tourmalines. Talanta 2018; 178:147-159. [PMID: 29136805 DOI: 10.1016/j.talanta.2017.09.030] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 09/06/2017] [Accepted: 09/10/2017] [Indexed: 11/28/2022]
Abstract
Fourteen samples of tourmaline from the Real Museo Mineralogico of Federico II University (Naples) have been characterized through multi-methodological investigations (EMPA-WDS, SEM-EDS, LA-ICP-MS, and FT-IR spectroscopy). The samples show different size, morphology and color, and are often associated with other minerals. Data on major and minor elements allowed to identify and classify tourmalines as follows: elbaites, tsilaisite, schorl, dravites, uvites and rossmanite. Non-invasive, non-destructive FT-IR and in-situ analyses were carried out on the same samples to validate this chemically-based identification and classification. The results of this research show that a complete characterization of this mineral species, usually time-consuming and expensive, can be successfully achieved through non-destructive FT-IR technique, thus representing a reliable tool for a fast classification extremely useful to plan further analytical strategies, as well as to support gemological appraisals.
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Affiliation(s)
- Mariano Mercurio
- Department of Science and Technology, University of Sannio, Via dei Mulini 59/A, 82100 Benevento, Italy.
| | - Manuela Rossi
- Department of Earth Sciences, Environment and Resources, Federico II University, via Cinthia, 80126 Napoli, Italy; Real Museo Mineralogico, Cnetro Musei delle Scienze Naturali e Fisiche, Federico II University, via Mezzocannone 8, 80134 Napoli, Italy
| | - Francesco Izzo
- Department of Science and Technology, University of Sannio, Via dei Mulini 59/A, 82100 Benevento, Italy
| | - Piergiulio Cappelletti
- Department of Earth Sciences, Environment and Resources, Federico II University, via Cinthia, 80126 Napoli, Italy
| | - Chiara Germinario
- Department of Science and Technology, University of Sannio, Via dei Mulini 59/A, 82100 Benevento, Italy
| | - Celestino Grifa
- Department of Science and Technology, University of Sannio, Via dei Mulini 59/A, 82100 Benevento, Italy
| | - Maurizio Petrelli
- Department of Physics and Geology, University of Perugia, Piazza dell'Università 1, 06123 Perugia, Italy
| | - Alessandro Vergara
- Department of Chemical Sciences, Federico II University, Via Mezzocannone 8, 80134 Napoli, Italy
| | - Alessio Langella
- Department of Science and Technology, University of Sannio, Via dei Mulini 59/A, 82100 Benevento, Italy
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Kunwar S, Sui M, Zhang Q, Pandey P, Li MY, Lee J. Various Silver Nanostructures on Sapphire Using Plasmon Self-Assembly and Dewetting of Thin Films. NANO-MICRO LETTERS 2017; 9:17. [PMID: 30474035 PMCID: PMC6225926 DOI: 10.1007/s40820-016-0120-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 11/07/2016] [Indexed: 05/04/2023]
Abstract
Silver (Ag) nanostructures demonstrate outstanding optical, electrical, magnetic, and catalytic properties and are utilized in photonic, energy, sensors, and biomedical devices. The target application and the performance can be inherently tuned by control of configuration, shape, and size of Ag nanostructures. In this work, we demonstrate the systematical fabrication of various configurations of Ag nanostructures on sapphire (0001) by controlling the Ag deposition thickness at different annealing environments in a plasma ion coater. In particular, the evolution of Ag particles (between 2 and 20 nm), irregular nanoclusters (between 30 and 60 nm), and nanocluster networks (between 80 and 200 nm) are found be depended on the thickness of Ag thin film. The results were systematically analyzed and explained based on the solid-state dewetting, surface diffusion, Volmer-Weber growth model, coalescence, and surface energy minimization mechanism. The growth behavior of Ag nanostructures is remarkably differentiated at higher annealing temperature (750 °C) due to the sublimation and temperature-dependent characteristic of dewetting process. In addition, Raman and reflectance spectra analyses reveal that optical properties of Ag nanostructures depend on their morphology.
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Affiliation(s)
- Sundar Kunwar
- College of Electronics and Information, Kwangwoon University, Nowon-gu, Seoul, 01897 South Korea
| | - Mao Sui
- College of Electronics and Information, Kwangwoon University, Nowon-gu, Seoul, 01897 South Korea
| | - Quanzhen Zhang
- College of Electronics and Information, Kwangwoon University, Nowon-gu, Seoul, 01897 South Korea
| | - Puran Pandey
- College of Electronics and Information, Kwangwoon University, Nowon-gu, Seoul, 01897 South Korea
| | - Ming-Yu Li
- College of Electronics and Information, Kwangwoon University, Nowon-gu, Seoul, 01897 South Korea
| | - Jihoon Lee
- College of Electronics and Information, Kwangwoon University, Nowon-gu, Seoul, 01897 South Korea
- Institute of Nanoscale Science and Engineering, University of Arkansas, Fayetteville, AR 72701 USA
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