Essays about: "poly"

Showing result 21 - 25 of 237 essays containing the word poly.

1. 21. Organic Solar Cell Fabrication and Study on the Influence of Spin-dependent Processes on the Photocurrent using Spin-sensitive Techniques

   University essay from Uppsala universitet/Fasta tillståndets fysik

   Author : Ronja Olsmats Baumeister; Evelina Roxner; [2022]
   Keywords : EDMR; EPR; trEDMR; PEDOT:PSS; PCBM; P3HT; organic solar cells; osc; opv;

   Abstract : Research in recent years on novel materials in organic solar cells (OSCs) have contributed to a rapid advancement in OSC efficiency. Here, OSCs with the well-studied organic semiconductors poly(3-hexylthiophene):[6,6]-phenyl C60-butyric acid methylester (P3HT:PCBM) in a bulk heterojunction structure were prepared to establish a baseline procedure for fabrication and spin-sensitive spectroscopy. READ MORE

3. 22. BCP Lithography Defined Arrays of InAs NWs Grown Using MOVPE with Au Seeds

   University essay from Lunds universitet/Lunds Tekniska Högskola; Lunds universitet/Fasta tillståndets fysik

   Author : Björn Landeke-Wilsmark; [2022]
   Keywords : Physics and Astronomy;

   Abstract : In this report we outline a detailed process flow for a quick and inexpensive implementation of large dense arrays of InAs nanowires (NWs) grown in the reactive ion etching/etched (RIE) pores of a SiO2/SiNx mask on top of an InAs/Si(111) substrate. The self-assembled (hexagonally close-packed) pattern of poly(methyl-methacrylate) (PMMA) cylinders in a poly(styrene) (PS) matrix adopted by a linear diblock poly(styrene-block-methyl-methacrylate) P(S-b-MMA) block-copolymer (BCP) was transferred to the dielectric stack (consisting of a ≈10 nm plasma enhanced chemical vapour deposition/deposited (PECVD) SiNX layer topped by a thin atomic layer deposition/deposited (ALD) SiO2 film) using a two-step RIE procedure. READ MORE

4. 23. Electrochemical behavior of conducting polymers

   University essay from KTH/Kemi

   Author : Raghda Kalifa; [2022]
   Keywords : Cathodic protection; conducting polymers; conductivity; structure; compression; Katodiskt skydd; ledande polymerer; konduktivitet; struktur; kompression;

   Abstract : Ett stort industriellt problem när det gäller metalliska material är korrosion. En metod för att förhindra korrosion är genom en elektrokemisk process som kallas katodiskt skydd vilket kan utföras på två olika sätt: Katodiskt korrosionsskydd med påtryckt ström (ICCP) eller offeranod (SACP). READ MORE

5. 24. Quantification of Fatty Acid Composition in Short T2* Tissue Using MRI – Comparison of 3 T and 7 T

   University essay from Lunds universitet/Sjukhusfysikerutbildningen

   Author : Felix Månsson; [2022]
   Keywords : Medicine and Health Sciences;

   Abstract : Purpose: To optimize a method and develop an algorithm to quantify Fatty Acid Composition (FAC) in bone marrow adipose tissue. By using different reconstruction models, compare different MRI systems (3 T and 7 T) to find the optimal field strength and reconstruction model for FAC quantification. READ MORE

6. 25. Polymer-based additive manufacturing: optimization for high-performance degradable polymers

   University essay from KTH/Fiber- och polymerteknologi

   Author : Danjing Chen; [2022]
   Keywords : copolymerization; fused filament fabrication; degradable polymer; scaffold; 3D printing; sampolymerisering; tillverkning av filament; nedbrytbar polymer; tredimensionella matriser; 3D printing;

   Abstract : I det här utvecklas en reproducerbar polymerisationsmetod för att uppnå en stabil produktion av poly(ε-caprolakton-co-p-dioxanon) (PCLDX), skala upp filamenttillverkningen för att producera 1.75 mm långa filament och optimera 3D-utskriftsprocessen för att tillverka ställningar/anordningar för mjukvävnadsteknik. READ MORE