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Mahatmanti1,a, Nuryono2,b, Dwi Siswanta2,c 1Department of Chemistry, Faculty of Mathematics and Natural Sciences, Semarang State University, Indonesia 50229 2Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, Yogyakarta, Indonesia 55281 awidhimahatmanti17@gmail.com, afwidhi_kimia@mail.unnes.ac.id, bnuryono_mipa@ugm.ac.id, cdsiswanta@ugm.ac.id Keywords: Chitosan, Tetraethyl Orthosilicate, Polyethylene Glycol, Membrane Abstract.
SEM test results obtained in accordance with the results of previous studies that chitosan membrane having a uniform morphological structure and non-porous [8].
According to [10], the addition of silica causes the crystal structure turns into amorph characterized by the appearance of a peak at 2Ɵ = 23.0°.
Effect of PEG on chitosan membrane crystal structure, made possible by the interaction of chitosan with PEG via the formation of hydrogen bonds [4].

Some researchers have started the theoretical [12] and experimental [13] work to investigate the local EM field enhancement in associated structure of the aggregated NPs that produces the SERS signal.
The absence of other peaks indicates a high purity of the silver with face-centered crystal (fcc) structure.
A typical transmission electron microscopy (TEM) image of the Ag NPs (Fig 2a) and its corresponding high resolution transmission electron microscopy (HRTEM) image (Fig 2b) further reveal that Ag NPs uniformly disperse in the field of vision and lattice spacing can be measured with a value of d = 0.236 nm, which corresponds to the (111) plane of metallic Ag with a fcc structure.
The Jouanal Of Physical Chemistry A 2009 (113) 1946-1953
Correlated Super-Resolution Optical and Structural Studies of Surface-Enhanced Raman Scattering Hot Spots in Silver Colloid Aggregates The Journal of Physical Chemistry letters 2011 (2) 1766-1770

ZHAOb Key Laboratory of Ethnic Medicine Resource Chemistry，State Ethnic Affairs Commission & Ministry of Education，Yunnan University of Nationalities, Kunming 650031, PR China aemail: yanli5901@126.com, email: zhaojishou@163.com b Keywords: Platinum group metals; Pressure cyanidation; dissolution; metal Palladium powder Abstracts: A research study has been undertaken to develop the fundamentals of a method for the direct dissolution of Metal Palladium.
He notes that the heavy platinum group metal complexes have higher thermodynamic and kinetic stability than the light platinum group complexes with the same valence state, same complexing agent and same complex ion geometrical structure.
On the other hand, the lower stability of Pd(CN)42−has a planar square structure, allowing O2 to attack the central ions along the Z axis.
(5) The dissolution mechanism involves the structure and bonding mechanism of cyanide and oxygen adsorbed on palladium atom.
D29 [19] Tan Guo, Andreas Illies, Vince Cammarata, Michael Arndt, William Sonzogni, A study of cyanide oxidation using electrochemical/electrospray mass spectrometry, Journal of Electroanalytical Chemistry 610 (2007) 102–105

In the design of thin solar cells, we have to introduce a thin buffer layer such as CdS or ZnS in the structure to reduce probability of recombination of electron hole pair to offer a stable electric output.
The acquired specimens were examined by the field emission scanning electron microscopy (FE-SEM) on the surface morphology, film thickness and uniformity, and interfacial structure from the cross-section.
At deposition time of 40 min, only the island-like structure was observed in the ZnS film.
Materials Chemistry and Physics, 90 (2005) 106-110
Angel, Materials Chemistry and Physics, 61 (1999) 139-142

Study on the Ag@SiO2 enhanced the luminous intensity of the terbium complexes with benzoic acid and 1,10-phenanthroline Bin YUE 1, a, Yuan LI 2,b, Kai KONG 3,c , Haibin CHUd, Yongliang ZHAOe 1,2,3 College of Chemistry and Chemical Engineering, Inner Mongolia University, China abinbin1026@yahoo.cn, dbinghai99@gmail.com, ehxzhaoyl@163.com.
These show the versatility of the core-shell structure, and that after some modifications, fluorescence enhancement can be achieved with appreciable advantages[10].
This will be wide the road of core-shell structure to apply to the field of rare earth fluorescence enhancement and benefit the preparations and further applications of functional materials in near future.
Transmission electron microscopy (TEM, Model JEM-2100) was used to study the size, morphology and structure of the core-shell Ag@SiO2 nanoparticles.
Chemistry of Materials. 12(2002)3788-91

Influence of Pressure on Morphology of TiO2 Nanofibers Prepared by Microwave-Assisted Synthesis Method Reinis Drunka1,a*, Janis Grabis1,b and Aija Krumina1,c 1Riga Technical University, Institute of Inorganic Chemistry, Paula Valdena 7, Riga, Latvia areinis.drunka@rtu.lv, bjanis.grabis_3@rtu.lv, caija.krumina_4@rtu.lv Keywords: titania, TiO2, photocatalysis, nanofibers, microwave synthesis.
Depending on raw materials used, materials with differing crystallite size and structure can be obtained.
Their structure has defects, and separate TiO2 nanoparticles that are residues from the raw materials are on the surface of obtained nanofibers.
Schwank, A review on TiO2-based nanotubes synthesized via hydrothermal method: Formation mechanism, structure modification, and photocatalytic applications, Catal.
Varma, Microwave-assisted chemistry: synthetic applications for rapid assembly of nanomaterials and organics, Acc.

In the present work, methacryl esters-acrylamide-vinyl acetate copolymer (AAV) was synthesized, and the chemical structures of the polymer prepared were studied by means of IR.
Vinyl acetate (purity≥99.5%) was obtained from the Fine Chemistry Trial Plant of Nankai University.
Results and Discussions Characterization of chemical structures of copolymers and Methacrylic acid ester.
The chemical structures of the first monomer and copolymer AAV were studied by means of infrared spectrometry in chloroform solution.
Xi, et al: Journal of Natural Gas Chemistry, vol. 15 (2006) no. 3, p. 217-222

Carbyne which has special physical and chemical properties owing to the unique structure may be a superconductor material at room temperature, also can be used as a superstrong fiber.
Ag has the strongest polarization force and clear deformability thanks to the unique electronic configuration ((n-1) d10ns1-2) and outer electronic structure (18 electronic shell layer structure).
Emeleus: Comprehensive Inorganic Chemistry(1973)
Inorganic Chemistry Tutorial(Science Press, Beijing 2000) [10] K.

From the twin perspectives of green chemistry and efficiency, the use of such solvents leaves much to be desired.
The diffraction patterns for selected deposits can be indexed to a chemically disordered fcc structure very similar to that of pure aluminum, indicating that the Al-Ni alloys is a single phase, supersaturated solid solution.
As increasing the overpotential, the Ni was not homogeneously distributed throughout the deposits (Fig. 3b, c) and began to show much more classification structure (Fig. 3d).
Chan, Solvent-free route to ionic liquid precursors using a water-moderated microwave process, Green chemistry, 4 (2002) 328-330
Zhang, Surface morphology, crystal structure and orientation of aluminium coatings electrodeposited on mild steel in ionic liquid, Chem Eng J, 147 (2009) 79-86

WPCO samples also showed the presence of C=O group in its structure.
The presence of free OH group is essential in the polyol production because this functional group will react with isocyanate to form polyurethane structures.
The band observed at 730 cm-1 is due to the rocking CH2 (n>3) vibration indicates the presence of a long linear chain aliphatic structure [8].
Coates, Interpretation of Infrared Spectra, A Practical Approach, Encyclopedia of Analytical Chemistry, (2006)
Vancso, Macromolecular Chemistry and Physics 219 (2018) 1700214