inorganic material
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Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 608
Author(s):  
Tomoki Ozawa ◽  
Masayuki Murata ◽  
Takashi Suemasu ◽  
Kaoru Toko

Flexible and reliable thermoelectric generators (TEGs) will be essential for future energy harvesting sensors. In this study, we synthesized p- and n-type SiGe layers on a high heat-resistant polyimide film using metal-induced layer exchange (LE) and demonstrated TEG operation. Despite the low process temperature (<500 °C), the polycrystalline SiGe layers showed high power factors of 560 µW m−1 K−2 for p-type Si0.4Ge0.6 and 390 µW m−1 K−2 for n-type Si0.85Ge0.15, owing to self-organized doping in LE. Furthermore, the power factors indicated stable behavior with changing measurement temperature, an advantage of SiGe as an inorganic material. An in-plane π-type TEG based on these SiGe layers showed an output power of 0.45 µW cm−2 at near room temperature for a 30 K temperature gradient. This achievement will enable the development of environmentally friendly and highly reliable flexible TEGs for operating micro-energy devices in the future Internet of Things.


Langmuir ◽  
2022 ◽  
Author(s):  
Sukanta K. Mondal ◽  
Chenglin Wu ◽  
Felix C. Nwadire ◽  
Ali Rownaghi ◽  
Aditya Kumar ◽  
...  

Author(s):  
Cristina V. Manzano ◽  
julia rodriguez acevedo ◽  
Olga Caballero-Calero ◽  
Marisol S. Martín-González

Research into the artificial reproduction of vibrant colours in natural creatures and the reproduction of their structural colours has generated considerable interest. One inorganic material that have been studied for...


Nanoscale ◽  
2022 ◽  
Author(s):  
Xueyan Zhao ◽  
Kai Tao ◽  
Lei Han

Metal-organic framework (MOF), an interesting class of functional inorganic material, has recently emerged as a suitable electrode material or template/percursor of electrode material for supercapacitors (SCs). The key in utilizing...


2021 ◽  
Vol 2070 (1) ◽  
pp. 012004
Author(s):  
A. Jegatheesan ◽  
E. Rajasekaran

Abstract The opto-electrical properties of mixing organic compound with inorganic material is the subject matter of electronic industry. Nonlinear active single crystals of amino acid doped ammonium phosphate was characterised using various experimental techniques. Specifically alanine was doped with inorganic material and characterised in terms of carbon role in structure formation and related properties. The structural and electrical properties are studied by analysing absorption, transmission, hardness and conductivity of the doped one. The structure and electrical framework are well suited with expected values of pure inorganic one. Otherwise the organic one mixed with inorganic one does changes these properties remarkably which are essential for application in modern livelihood of human nature. The single crystal obtained from doping of organic one with the properties of inorganic material proves to be suitable for robo one to walk away with newer developments. It promises a newer way of developing crystals with good mechanical strength, flexible and all kinds of opto-electrical properties. Interestingly the modern electronic appliances will greatly benefit from this development of organic one to the inorganic one.


2021 ◽  
Author(s):  
Shan Yang

Raman spectra are molecule specific, and their peaks in the fingerprint region (200-2000 cm−1) are often sufficient for material identification. High-wavenumber signals (> 2000 cm−1) are rare in inorganic material but rich in organic materials containing light hydrogen atoms. Reports on high-wavenumber (HW) Raman signals are far less than fingerprint signals. This could be partially attributed to the difficulty obtaining HW Raman signals, especially from biological materials containing fluorescent proteins. The development and the availability of InGaAs array and the near-infrared (NIR) laser enabled the acquisition of distinct HW Raman from bio-materials. In this chapter, we will introduce recent applications of HW Raman spectroscopy on different materials, especially on biological tissues. Raman instrumentation based on multiple lasers or multiple spectrometers will also be discussed.


2021 ◽  
Vol 22 (17) ◽  
pp. 9652
Author(s):  
Veronika Mikušová ◽  
Peter Mikuš

Nanoparticles (NPs) have an outstanding position in pharmaceutical, biological, and medical disciplines. Polymeric NPs based on chitosan (CS) can act as excellent drug carriers because of some intrinsic beneficial properties including biocompatibility, biodegradability, non-toxicity, bioactivity, easy preparation, and targeting specificity. Drug transport and release from CS-based particulate systems depend on the extent of cross-linking, morphology, size, and density of the particulate system, as well as physicochemical properties of the drug. All these aspects have to be considered when developing new CS-based NPs as potential drug delivery systems. This comprehensive review is summarizing and discussing recent advances in CS-based NPs being developed and examined for drug delivery. From this point of view, an enhancement of CS properties by its modification is presented. An enhancement in drug delivery by CS NPs is discussed in detail focusing on (i) a brief summarization of basic characteristics of CS NPs, (ii) a categorization of preparation procedures used for CS NPs involving also recent improvements in production schemes of conventional as well as novel CS NPs, (iii) a categorization and evaluation of CS-based-nanocomposites involving their production schemes with organic polymers and inorganic material, and (iv) very recent implementations of CS NPs and nanocomposites in drug delivery.


Science ◽  
2021 ◽  
pp. eabh1619
Author(s):  
Quinn D. Gibson ◽  
Tianqi Zhao ◽  
Luke M. Daniels ◽  
Helen C. Walker ◽  
Ramzy Daou ◽  
...  

The thermal conductivity of crystalline materials cannot be arbitrarily low as the intrinsic limit depends on the phonon dispersion. We used complementary strategies to suppress the contribution of the longitudinal and transverse phonons to heat transport in layered materials containing different types of intrinsic chemical interface. BiOCl and Bi2O2Se encapsulate these design principles for longitudinal and transverse modes respectively, and the bulk superlattice material Bi4O4SeCl2 combines these effects by ordering both interface types within its unit cell to reach an extremely low thermal conductivity of 0.1 W K−1 m−1 at room temperature along its stacking direction. This value comes within a factor of four of air. We demonstrated that chemical control of the spatial arrangement of distinct interfaces can synergically modify vibrational modes to minimize thermal conductivity.


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