Hasil Pencarian  ::  Simpan CSV :: Kembali

"Porous silicon has a range of properties, making it ideal for drug delivery, cancer therapy, and tissue engineering. Porous silicon for biomedical applications provides a comprehensive review of this emerging nanostructured and biodegradable biomaterial.Chapters in part one focus on the fundamentals and properties of porous silicon for biomedical applications, including thermal properties and stabilization, photochemical and nonthermal chemical modification, protein-modified porous silicon films, and biocompatibility of porous silicon. Part two discusses applications in bioimaging and sensing, and explores the optical properties of porous silicon materials; in vivo imaging assessment and radiolabelling of porous silicon; and nanoporous silicon biosensors for DNA sensing and for bacteria detection. Finally, part three highlights drug loading and characterization of porous silicon materials, tumor targeting and imaging, and porous silicon scaffolds for functional tissue engineering, stem cell growth, and osteodifferentiation.With its acclaimed editor and international team of expert contributors, Porous Silicon for Biomedical Applications is a technical resource and indispensable guide for all those involved in the research, development, and application of porous silicon and other biomaterials, while providing a comprehensive introduction for students and academics interested in the field."

"Biomedical applications have benefited greatly from the increasing interest and research into semiconducting silicon nanowires. Semiconducting silicon nanowires for biomedical applications reviews the fabrication, properties, and applications of this emerging material.The book begins by reviewing the basics, as well as the growth, characterization, biocompatibility, and surface modification, of semiconducting silicon nanowires. It goes on to focus on silicon nanowires for tissue engineering and delivery applications, including cellular binding and internalization, orthopedic tissue scaffolds, mediated differentiation of stem cells, and silicon nanoneedles for drug delivery. Finally, it highlights the use of silicon nanowires for detection and sensing. These chapters explore the fabrication and use of semiconducting silicon nanowire arrays for high-throughput screening in the biosciences, neural cell pinning on surfaces, and probe-free platforms for biosensing.Semiconducting silicon nanowires for biomedical applications is a comprehensive resource for biomaterials scientists who are focused on biosensors, drug delivery, and tissue engineering, and researchers and developers in industry and academia who are concerned with nanoscale biomaterials, in particular electronically-responsive biomaterials."

"Precious metals and semi-precious metals are used for an increasing number of medical applications due to the properties of these metals and their alloys. Precious Metals for Biomedical Applications reviews the properties of precious metals and their resulting applications in medicine.Part one outlines the fundamentals of precious metals for biomedical applications, discussing their useful properties, such as biocompatibility and corrosion resistance. Part two goes on to provide an overview of the applications of precious metals in biomedicine, including dental, therapeutic, tissue engineering, and bioimaging applications. It discusses the advantages of the structure and properties of precious metals for these applications."

"Biomedical foams are a new class of materials, which are increasingly being used for tissue engineering applications. Biomedical Foams for Tissue Engineering Applications provides a comprehensive review of this new class of materials, whose structure can be engineered to meet the requirements of nutrient trafficking and cell and tissue invasion, and to tune the degradation rate and mechanical stability on the specific tissue to be repaired.Part one explores the fundamentals, properties, and modification of biomedical foams, including the optimal design and manufacture of biomedical foam pore structure for tissue engineering applications, biodegradable biomedical foam scaffolds, tailoring the pore structure of foam scaffolds for nerve regeneration, and tailoring properties of polymeric biomedical foams. Chapters in part two focus on tissue engineering applications of biomedical foams, including the use of bioactive glass foams for tissue engineering applications, bioactive glass and glass-ceramic foam scaffolds for bone tissue restoration, composite biomedical foams for engineering bone tissue, injectable biomedical foams for bone regeneration, polylactic acid (PLA) biomedical foams for tissue engineering, porous hydrogel biomedical foam scaffolds for tissue repair, and titanium biomedical foams for osseointegration."

"Written in a versatile, contemporary style that will benefit both novice and expert alike, Biological and Biomedical Coatings Handbook, Two-Volume Set covers the state of the art in the development and implementation of advanced thin films and coatings in the biological field. Consisting of two volumes--Processing and Characterization and Applications--this handbook details the latest understanding of advances in the design and performance of biological and biomedical coatings, covering a vast array of material types, including bio-ceramics, polymers, glass, chitosan, and nanomaterials. Contri."

"This book presents a thorough discussion of the physics, biology, chemistry and medicinal science behind a new and important area of materials science and engineering: polymer nanocomposites. The tremendous opportunities of polymer nanocomposites in the biomedical field arise from their multitude of applications and their ability to satisfy the vastly different functional requirements for each of these applications. In the biomedical field, a polymer nanocomposite system must meet certain design and functional criteria, including biocompatibility, biodegradability, mechanical properties, and, in some cases, aesthetic demands. "

"Engineers and scientists alike will find this book to be an excellent introduction to the topic of porous materials, in particular the three main groups of porous materials: porous metals, porous ceramics, and polymer foams. Beginning with a general introduction to porous materials, the next six chapters focus on the processing and applications of each of the three main materials groups. The book includes such new processes as gel-casting and freeze-drying for porous ceramics and self-propagating high temperature synthesis (SHS) for porous metals. The applications discussed are relevant to a wide number of fields and industries, including aerospace, energy, transportation, construction, electronics, biomedical and others. The book concludes with a chapter on characterization methods for some basic parameters of porous materials. "

"Riset ini difokuskan pada karakteristik linier arus-tegangan dioda P-I-N silikon skala nano doping tinggi dalam rentang temperatur dari 50K hingga 250 K serta karakteristik arus-tegangan dan konduktansi dioda P-N Silikon skala nano doping tinggi pada temperatur 5,5K. Untuk itu dioda P-N dan P-I-N dengan konsentrasi doping tinggi difabrikasi pada wafer ultra tipis berstruktur silicon-oninsulator (SOI). Dari hasil fabrikasi telah diperoleh konsentrasi doping tinggi Boron dan Phosphorus pada divais dioda mencapai 1×1020 cm-3 and 2×1020 cm-3, berturut-turut. Pengukuran karakteristik arus-tegangan dioda P-I-N silikon skala nano doping tinggi dilakukan pada beberapa divais dengan lapisan intrinsik sepanjang 200 nm dan 700 nm. Linieritas arus pada rentang forward bias dari 1,5 V hingga 2,0 V dan rentang temperatur dari 50 K hingga 250 K menunjukkan divais ini sesuai untuk sensor temperatur rendah. Pada pengukuran juga diperoleh data bahwa dioda P-I-N silikon skala nano doping tinggi menghasilkan arus yang lebih tinggi saat temperatur diturunkan dalam rentang forward bias dari 1,5 V hingga 2,0 V. Selain itu juga diperoleh data bahwa divais skala nano dengan lapisan intrinsik yang lebih panjang dan lebih lebar akan menghasilkan arus yang lebih tinggi pada rentang forward bias dari 1,5 V hingga 2,0 V dan temperatur dari 50K hingga 250K. Hasil pengukuran pada dioda P-N silikon skala nano doping tinggi pada rentang forward bias hingga 0,1 Volt maupun rentang reverse bias hingga -0,1 Volt menghasilkan beberapa puncak konduktansi yang menunjukkan kesesuaian nilai dengan level energi density of state dua dimensi (2D DOS) dan level energi kombinasi phonon pada temperatur 5,5K. Pada forward bias, level energi diskret heavy hole, light hole, serta kombinasi phonon TA, LA, TO dan LO berkontribusi signifikan pada puncak konduktansi dalam rentang tegangan hingga 0,1 Volt. Demikian juga halnya pada reverse bias, level energi diskret elektron 2-fold valley, 4-fold valley, serta kombinasi phonon TA, LA, TO dan LO berkontribusi signifikan pada puncak konduktansi dalam rentang tegangan hingga -0,1 Volt. Transport elektron pada dioda P-N Silikon dalam skala nano doping tinggi akan mengalami puncak konduktansi saat elektron memiliki energi yang sama dengan level diskret energi 2D DOS. Hal ini membuktikan adanya phonon-assisted tunneling pada dioda P-N silikon skala nano doping tinggi.

---

This report is focused on linier current-voltage (I?V) characteristic of highly-doped nanoscale Silicon P-I-N diodes at temperature from 50K to 250K and also I-V and conductance characteristics of highly-doped nanoscale Silicon P-N diode at temperature 5.5K. For that purpose, we fabricated nano scale P-I-N and P-N diodes within ultra thin silicon-on-insulator (SOI) structures. From fabrication, we achieved high doping concentrations of Boron and Phosphorus in SOI diodes, 1×1020 cm-3 and 2×1020 cm-3, respectively.

Measurement of current-voltage characteristics of highly-doped nanoscale silicon PIN diode is performed on devices with intrinsic layer length of 200 nm and 700 nm. The current linearity under forward bias range from 1.5 V to 2.0 V and temperature range from 50K to 250K shows that these devices are suitable for lowtemperature sensor. The measurement data shows also that highly-doped nanoscale silicon PIN diode produces higher current when the temperature is lowered under forward bias from 1.5 V to 2.0 V. In addition, the data shows that nanoscale devices with longer and wider intrinsic layer would generate higher current under forward bias range from 1.5 V to 2.0 V and temperature from 50K to 250K.

Measurement of highly-doped nanoscale silicon P-N diode under forward bias to 0.1 Volt and also reverse bias to -0.1 Volt results conductance peaks that show relationship with two-dimensional density of state (2D DOS) and phonon combination energy level at temperature 5.5K. Under forward bias, discrete energy level of heavy hole, light hole and phonon combination of TA, LA, TO and LO have significant contribution to conductance peaks in range 0.1 Volt. Also under reverse bias, discrete energy level of electron 2-fold valley, 4-fold valley and phonon combination of TA, LA, TO and LO have significant contribution to conductance peaks in range -0.1 Volt. Electron transport of highly-doped nanoscale silicon P-N diode will experience conductance peaks when it has equal energy with 2D DOS discrete energy level. It proves the existence of phonon-assisted tunneling on highly-doped nanoscale silicon P-N diode."

"This book presents an overview of the ways in which the latest experimental and theoretical nanotechnologies are serving the fields of biotechnology, medicine, and biomaterials. They not only enhance the efficiency of common therapeutics and lower their risks, but thanks to their specific properties, they also provide new capabilities. Nano-scale measurement techniques, such as nano-indentation and nano-scratch methods, could potentially be used to characterize the physical and mechanical properties of both natural tissues and synthetic biomaterials in terms of strength and durability."