CHARACTERIZATION AND MORPHOLOGY CONTROL OF POLY(p-PHENYLENEDIAMINE) MICROSTRUCTURES IN DIFFERENT pH

NANO ◽  
2011 ◽  
Vol 06 (06) ◽  
pp. 597-601 ◽  
Author(s):  
SI-WEI YANG ◽  
FANG LIAO
Keyword(s):  
Synthesis Method ◽  
Morphology Control ◽  
The Self ◽  
Self Organization ◽  
Controlled Synthesis ◽  
Ph Change ◽  
Solubility In Water ◽  
Product Morphology ◽  
Shape Controlled ◽  
The Difference

A novel and shape-controlled synthesis method for uniformly-shaped poly(p-phenylenediamine) (PpPD) microparticles was developed using ( NH 4)2 S 2 O 8 (APS) as an oxidant. The results demonstrated that the morphologies of PpPD varied from nanofibers to nanospheres and nest-like microspheres by tuning the pH of solution. Tiny pH change leads to the significant change in product morphology. The structure of microspheres is similar to graphene which was first discovered. Further study showed that the PpPD nanofibers were dimer. The difference in the structure of PpPD nanofibers and nanospheres (microspheres) resulted in different solubility in water. The nanosized oligomer crystallites served as starting templates for the nucleation of PpPD nanofibers. Further growth of nanofibers was proceeded by the self-organization of phenazine units or their blocks located at the ends of the PpPD chains.

Shape-controlled synthesis of cubic-like selenium nanoparticles via the self-assembly method

2016 ◽  
Vol 153 ◽  
pp. 435-444 ◽  
Author(s):  
Urarika Luesakul ◽  
Seamkwan Komenek ◽  
Songchan Puthong ◽  
Nongnuj Muangsin
Keyword(s):  
Self Assembly ◽  
The Self ◽  
Selenium Nanoparticles ◽  
Controlled Synthesis ◽  
Assembly Method ◽  
Shape Controlled

Developing our own organisations

2021 ◽  
pp. 99-110
Author(s):  
Peter Beresford
Keyword(s):  
Identity Politics ◽  
The Self ◽  
Self Organization ◽  
Disabled People ◽  
Shared Experience ◽  
Working Together ◽  
The Difference ◽  
Self Organizing

This chapter develops the discussion about working together by exploring how to have a real say — how we can develop our own organisations, as a basis for self-organization, rather than merely serving other people's causes. It looks beyond identity politics and the limitations associated with them, to focus on organising on the basis of shared experience, particularly of discrimination and exclusion. The chapter provides a basis for self-organizing around common understandings and strongly internalised goals arising from the desire to challenge oppression. It then returns to the self-organizing of disabled people, which has highlighted the difference between traditional processes where non-disabled people controlled the agenda and one where disabled people seek to speak and act on their own behalf, setting up and controlling their own organisations. Ultimately, the chapter mentions the case study of a 'user-led organisation', Shaping Our Lives, in which the author has been actively involved. Like other self-run organisations, it has done things differently to achieve different objectives, offering helpful insights for advancing participatory ideology in practice.

I Like Her, Because I Like Myself: Self-Evaluation as a Source of Interpersonal Attitudes

2003 ◽  
Vol 50 (4) ◽  
pp. 239-246 ◽  
Author(s):  
Eva Walther ◽  
Claudia Trasselli
Keyword(s):  
Opposite Effect ◽  
Learning Phase ◽  
The Self ◽  
Attitude Formation ◽  
Formation Processes ◽  
False Feedback ◽  
Self Evaluation ◽  
Evaluation Group ◽  
Group A ◽  
The Difference

Abstract. Two experiments tested the hypothesis that self-evaluation can serve as a source of interpersonal attitudes. In the first study, self-evaluation was manipulated by means of false feedback. A subsequent learning phase demonstrated that the co-occurrence of the self with another individual influenced the evaluation of this previously neutral target. Whereas evaluative self-target similarity increased under conditions of negative self-evaluation, an opposite effect emerged in the positive self-evaluation group. A second study replicated these findings and showed that the difference between positive and negative self-evaluation conditions disappeared when a load manipulation was applied. The implications of self-evaluation for attitude formation processes are discussed.

Kunst als reflexive Form und als reflektierende Bewegung

2010 ◽  
Vol 55 (2) ◽  
pp. 75-86
Author(s):  
Brigitte Hilmer
Keyword(s):  
Propositional Content ◽  
The Self ◽  
Aesthetic Judgement ◽  
The Difference ◽  
Self Reference

Kunst kann dann als reflexiv interpretiert werden, wenn Reflexivität nicht auf propositionalen Gehalt oder sogar sprachliche Artikulation angewiesen ist. Reflexion tritt auf in den Modi der Selbstbeziehung des Lebendigen, des Überlegens und der Selbstreferenz im Symbolischen. Kunst ist ein Reflexionsmedium, das diese Modi beansprucht und miteinander verflicht. Eine spezifisch ästhetische Reflexivität ist von und nach Kant nach dem Vorbild der transzendentalen Reflexion und in Konkurrenz zu ihr etabliert worden. Sie läßt sich als Reflexivität des ästhetischen Urteils, als emphatisches Gemachtsein, als Rückwendung auf Wahrnehmungsvollzüge oder als Begriffsreflexion verstehen. Dabei wird die Unterscheidung von Anschauung und Verstand in deren Zusammenspiel oder Abspaltung vorausgesetzt. Von der Analogie zur transzendentalen Reflexion löst sich aber erst ein Verständnis von ästhetischer Reflexivität, das von den drei Modi und ihrer Verflechtung ausgeht.<br><br>Reflexivity does not presuppose linguistic articulation or even propositional content. If it did, art could not be called reflexive. Reflexivity can be found in the self-contact of the living, in mental reflection or in symbolic self-reference. Art is a medium which claims these different modes of reflexivity and intertwines them. Aesthetic reflexivity as such has been established by Kant and his epigones, following the model of transcendetal reflection. Thus it could be specified as the reflexive structure of aesthetic judgement, or as an emphasis on a work’s being created, or as a reference to perception itself in the process of perceiving, or as a way of reflecting concepts. Aesthetic reflexivity can only be detached from the model of transcendental reflection, if it is seen as oriented towards the interaction among the three modes of reflection mentioned above, leaving aside the difference, interplay or competition between perception and conceptual capacities.

Fluorine-mediated synthesis of anisotropic iron oxide nanostructures for efficient T2-weighted magnetic resonance imaging

Nanoscale ◽  
2021 ◽  
Author(s):  
Tao Sun ◽  
Yiding Liu ◽  
Chunyu Zhou ◽  
Liang Zhang ◽  
Xun Kang ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Iron Oxide ◽  
Controlled Synthesis ◽  
Resonance Imaging ◽  
Fluoride Ions ◽  
Oxide Nanostructures ◽  
Weighted Magnetic Resonance Imaging ◽  
Shape Controlled ◽  
Novel Strategy ◽  
Iron Oxide Nanostructures

Herein, we developed a novel strategy for the shape-controlled synthesis of fluorine-doped iron oxide nanostructures with superior r2 values through the introduction of fluoride ions as a morphology controlling agent...

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