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A new flash (ultra-rapid) spark plasma sintering method applicable to various materials systems, regardless of their electrical resistivity, is developed. A number of powders ranging from metals to electrically insulative ceramics have been…

Materials Science · Physics 2020-12-01 Charles Manière , Geuntak Lee , Eugene A. Olevsky

The ultrafast laser-induced solid-liquid phase transition in metals is still not clearly understood and its accurate quantitative description remains a challenge. Here we systematically investigated, both experimentally and theoretically,…

Patterns of silver metal were prepared on DNA networks by a template-directed selective deposition and subsequent metallization process. Scanning force microscopic observations and XPS investigations demonstrated that uniform networks of…

Materials Science · Physics 2010-09-09 Shuxi Dai , Xingtang Zhang , Tianfeng Li , Zuliang Du , Hongxin Dang

Photoirradiation of silver nanoparticles in water solution of NaNO3 (0.01M) and in dissolved DNA was investigated by spectrophotometric and thermodynamic kinetic approaches. It is shown that only the irradiated complexes AgNPs-DNA have…

Biological Physics · Physics 2012-06-22 Vasil G. Bregadze , Zaza G. Melikishvili , Tamar G. Giorgadze

This paper reports an effective method of stabilizing ultrathin Silver (Ag) films on substrates using a filler metal (Zn). Ag films with a thickness < 15 nm were deposited by DC magnetron sputtering above a Zn filler metal on glass, quartz,…

Silver benzeneselenolate [AgSePh] is a coordination polymer that hosts a hybrid quantum well structure. The recent advancements in the study of its tightly bound excitons (~300 meV) and photoconductive properties (recently employed in UV…

Applied Physics · Physics 2020-09-25 Lorenzo Maserati , Stefano Pecorario , Mirko Prato , Mario Caironi

Nanostructured titania derived from the sol-gel processing requires a detailed study to clarify state-of-art of every process step starting from colloidal sol, peptization, gelation to the final sintering. The applied parameters such as…

We report ultrafast electron dynamics in gold nanorods investigated using 80 fs laser pulses centered at 1.57 eV. Five types of nanorod colloidal suspensions in water having their longitudinal surface plasmon peak (ELSP) on either side of…

Mesoscale and Nanoscale Physics · Physics 2015-05-28 M. Anija , Sunil Kumar , N. Kamaraju , Neha Tiwari , S. K. Kulkarni , A. K. Sood

Percolation of gold films of ~15 nm thickness was controlled to achieve the largest openings during Au deposition. Gold was evaporated on 300-nm-thick films of nanostructured porous and columnar SiO2, TiO2 and MgF2 which were deposited by…

Image processing and pattern recognition offer a useful and versatile method for optically characterizing drops of a colloidal solution during the drying process and in its final state. This paper exploits image processing techniques…

Soft Condensed Matter · Physics 2020-02-11 Anusuya Pal , Amalesh Gope , Germano S. Iannacchione

Metal nanoparticles have a substantial impact across different fields of science, such as photochemistry, energy conversion, and medicine. Among the commonly used nanoparticles, silver nanoparticles are of special interest due to their…

Soft Condensed Matter · Physics 2022-04-29 Jakob Wolf , Tomasz M. Stawski , Glen J. Smales , Andreas F. Thuenemann , Franziska Emmerling

This paper presents modelled results for optical absorption in ultra-thin films of nickel, gold and silver across the solar spectrum. It is found in the case of nickel there is an optimum thickness for maximum solar absorption around…

Optics · Physics 2012-03-08 N. Ahmad , J. Stokes , N. A. Fox , M. Teng , M. J. Cryan

Ultrafast melting is fundamentally a structural transition of the ionic lattice, but this rearrangement also reshapes the electronic properties by changing the energy landscape and scattering mechanisms. Although the electrons react almost…

Selective laser sintering (SLS) of single component metal powders is a rapid prototyping technology in which a high-energy laser beam scans, melts, shrinks and consolidates metal powders with single component. For better understanding…

Computational Physics · Physics 2016-02-04 Bin Xiao , Yuwen Zhang

Many medical and biological protocols for analyzing individual biological cells involve morphological evaluation based on cell staining, designed to enhance imaging contrast and enable clinicians and biologists to differentiate between…

Silver films were deposited at room temperature onto H-passivated Si(111) surfaces. Their electronic properties have been analyzed by angle-resolved photoelectron spectroscopy. Submonolayer films were semiconducting and the onset of…

Materials Science · Physics 2009-11-07 A. Arranz , J. F. Sanchez-Royo , J. Avila , V. Perez-Dieste , P. Dumas , M. C. Asensio

Time of Flight Secondary Ion Mass Spectroscopy, X-Ray Photoelectron Spectroscopy, in situ Photo-Current Spectroscopy and electrochemical analysis were combined to characterize the physicochemical alterations induced by electrochemical…

Focused ion beam (FIB) techniques are commonly used to machine, analyse and image materials at the micro- and nanoscale. However, FIB modifies the integrity of the sample by creating defects that cause lattice distortions. Methods have been…

Materials Science · Physics 2021-03-05 David Yang , Nicholas W. Phillips , Kay Song , Ross J. Harder , Wonsuk Cha , Felix Hofmann

Over the last decade, single-molecule optical microscopy has become the gold-standard approach to decipher complex molecular processes in cellular environments. [1-3] Single-molecule fluorescence microscopy has several advantages such as…

Biological Physics · Physics 2017-11-15 Edakkattuparambil Sidharth Shibu , Nadezda Varkentina , Laurent Cognet , Brahim Lounis