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  • 1
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    A Review on Photothermal Conversion of Solar Energy with Nanomaterials and Nanostructures: From Fundamentals to Applications (2022)
    Details
    Publication Date: 2023-01-30
    Description: Solar energy is a green, sustainable, and de facto inexhaustible energy source for mankind. The conversion of solar energy into other forms of energy has attracted extensive research interest due to climate change and the energy crisis. Among all the solar energy conversion technologies, photothermal conversion of solar energy exhibits unique advantages when applied for water purification, desalination, high‐temperature heterogeneous catalysis, anti‐bacterial treatments, and deicing. In this review, the various photothermal conversion mechanisms based on different forms of heat release are summarized and some of the latest examples are presented. In addition, the necessary prerequisites for solar‐driven photothermal materials toward their practical applications are also discussed. Further, the latest advances in photothermal conversion of solar energy are discussed, focusing on different types of photothermal applications. Finally, a summary is given and the challenges and opportunities in the photothermal conversion of solar energy are presented. This review aims to give a comprehensive understanding of emerging solar energy conversion technologies based on the photothermal effect, especially by using nanomaterials and nanostructures.
    Description: This review presents the broad scope of photothermal applications, offers a comprehensive understanding of the photothermal conversion of solar energy with nanomaterials and nanostructures, and provides guidelines for better design and fabrication of photothermal materials.
    Description: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Description: P.C. was supported by a China Scholarship Council (CSC) fellowship
    Keywords: ddc:333.79 ; broadband light absorbers ; photothermal applications ; photothermal mechanisms ; solar energy conversion ; sustainable energy technologies
    Language: English
    Type: doc-type:article
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    CITATION GEO-LEO
  • 2
    Electronic Resource
    Electronic Resource
    Mössbauer investigation of laser nitrided stainless steel and annealing treatments of laser nitrided iron (2000)
    Springer
    Hyperfine interactions 126 (2000), S. 211-214 
    Details
    ISSN: 1572-9540
    Keywords: laser nitriding ; iron nitrides ; stainless steel ; annealing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Laser nitriding is used for the fast and easy production of nitride coatings on iron and alloys. Here, first results of the laser nitriding process applied to stainless steel are reported. The laser treatment led to the appearance of additional lines in the Mössbauer spectra, which are attributed to γ-Fe(N) produced by the laser nitriding process. The Mössbauer results are discussed in connection with the results obtained from X-ray diffraction and resonant nuclear reaction analysis. Furthermore, the results of isochronical annealing treatments of laser nitrided iron are reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1012625702719
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Depth analysis by combination of conversion electron, conversion X-ray and γ-ray Mössbauer spectroscopy (1990)
    Springer
    Hyperfine interactions 57 (1990), S. 2101-2104 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Conversion electrons, conversion X-rays and transmitted γ-rays were used to determine magnetic structures. The penetration depths of these radiations allow the material to be scanned.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02405770
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Iron nitrides and laser nitriding of steel (1998)
    Springer
    Hyperfine interactions 111 (1998), S. 113-119 
    Details
    ISSN: 1572-9540
    Keywords: iron nitrides ; laser nitriding ; Mössbauer spectroscopy ; RNRA ; RBS
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Nitriding of iron and steels is well known to improve hardness, wear and corrosion resistance of surfaces. Recently, it has been found that a simple irradiation of iron and steel with pulses of an excimer laser in air or nitrogen leads to a significant nitrogen take-up into the surface and to improvements in the surface properties. The mechanisms of the laser-nitriding process are not yet understood but the nitrification will be proved by several methods. Among these, Mössbauer spectroscopy is very powerful, especially when Conversion Electron and Conversion X-ray Mössbauer Spectroscopy (CEMS and CXMS) are applied simultaneously. Nevertheless, only a combination of methods gives a satisfying overview of the laser induced nitriding processes: Rutherford Backscattering Spectrometry (RBS) and Resonant Nuclear Reaction Analysis (RNRA) were also used to characterize the treated surfaces. First measurements show an increase of the hardness and the wear resistance with the number of pulses. From the results of the CEMS analyses this should be correlated with the increase in the fraction of the ε-phase. This may be important for industrial applications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1012637230016
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  • 5
    Electronic Resource
    Electronic Resource
    Characterization and Oxidation of Magnetron Sputtered Fe-Al Intermetallic Alloys (1998)
    Springer
    Hyperfine interactions 112 (1998), S. 155-160 
    Details
    ISSN: 1572-9540
    Keywords: Magnetron Sputtering ; Iron ; Aluminum ; Intermetallic phases ; oxidation ; Mössbauer Spectroscopy ; CEMS ; RBS ; HRSEM
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Fe-Al intermetallic alloys have been considered as protective materials against corrosion. We have studied the properties of such intermetallic coatings Fe x Al1−x (x ≤ 0.5) on the aluminum-rich side and their oxidation behaviour. The samples were prepared using rf-magnetron sputtering. The composition and layer thickness were determined by Rutherford Backscattering Spectrometry (RBS) and high-resolution scanning electron microscopy (HRSEM). Conversion Electron Mössbauer Spectroscopy (CEMS) and X-Ray Diffraction (XRD) were applied for phase analysis. We report here on the oxidation of such coatings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1011017517588
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Laser nitriding investigated with Mössbauer spectroscopy (1998)
    Springer
    Hyperfine interactions 113 (1998), S. 429-434 
    Details
    ISSN: 1572-9540
    Keywords: laser nitriding ; iron nitrides ; CEMS ; CXMS ; RNRA ; nanoindentation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The effect of the nitrogen take‐up upon irradiation of iron or steel with excimer laser pulses in air or in nitrogen atmosphere is well established. The resulting phase compositions and nitrogen depth profiles were measured by a combination of simultaneous Conversion Electron Mössbauer Spectroscopy (CEMS), Conversion X‐ray Mössbauer Spectroscopy (CXMS), and Resonant Nuclear Reaction Analysis (RNRA) as a function of the nitrogen gas pressure during irradiation. A maximum nitrogen content and a maximum fraction of the ɛ-nitride was found at 0.1 MPa. This result is in accordance with hardness measurements performed by the nanoindentation technique.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1012625111302
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  • 7
    Electronic Resource
    Electronic Resource
    Characterization of laser-nitrided iron and sputtered iron nitride films (1995)
    Springer
    Hyperfine interactions 95 (1995), S. 199-225 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Laser-nitriding may be a promising technique for substituting conventional nitriding processes. We have irradiated pure iron with pulses of an excimer laser and achieved high nitrogen contents in a thin surface layer. We found that the nitrogen is dissolved into γ-Fe, leading to a large amount of retained austenite. This was also verified by X-ray diffraction (XRD) measurements. Three subspectra can be resolved in the Mössbauer spectra (CEMS) for this nitrogen austenite. The nitrogen concentration can be calculated in terms of site occupation, indicating a content as high as 16(1) at%, which is consistent with the results of Rutherford backscattering spectroscopy (RBS), resonant nuclear reaction analysis (RNRA) and Auger electron spectroscopy (AES) measurements. This is more than the solubility limit for γ-Fe(N). By reactive magnetron-sputtering it is possible to produce thin iron nitride films of various stoichiometries. We report on the production ofε-Fe x N and FeN y films. These films were again characterized by CEMS, RBS, RNRA (15N(p, αγ)) and XRD. Forε-Fe x N, produced in the range 2⩽x⩽3 with medium nitrogen flows during reactive sputtering, the Mössbauer spectra can be well resolved in terms of different iron sites, enabling an accurate calculation of the nitrogen content. For high nitrogen flows during sputtering a phase FeN y withy〉0.5 is produced. This phase is not reported in the Fe-N phase diagram.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02146315
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  • 8
    Electronic Resource
    Electronic Resource
    Surface phase analysis by conversion X-ray and conversion electron Mössbauer spectroscopy (1991)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 341 (1991), S. 131-135 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Mössbauer spectroscopy can be performed in transmission and backscattering geometry. The backscattered conversion electrons and X-rays can be used for nondestructive phase analysis on surfaces. Based on their different interactions in materials, they enable analyses of different depths. It is of particular interest to measure backscattering radiation and γ-ray transmission simultaneously. Based on the hyperfine parameters of the Mössbauer spectra information about phases, structures, defects and magnetic properties can be obtained. Besides the qualitative analysis in general an accurate quantitative phase analysis is possible. For example spectra of laser treated alloys are shown. It is the purpose of this note to demonstrate the use of these different types of radiation (electrons, X-ray and γ-ray) in analyzing surface phenomena.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00322123
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  • 9
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    Perturbed angular correlations at ISOLDE: A 40 years young technique (2017)
    American Institute of Physics
    Details
    Publication Date: 2017-10-01
    Electronic ISSN: 2158-3226
    Topics: Physics
    Published by American Institute of Physics
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    PAPER CURRENT
  • 10
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    TDPAC study of Fe-implanted titanium dioxide thin films (2017)
    American Institute of Physics
    Details
    Publication Date: 2017-09-01
    Electronic ISSN: 2158-3226
    Topics: Physics
    Published by American Institute of Physics
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    PAPER CURRENT
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