Theory of the thermodynamic influence of solution-phase additives in shape-controlled nanocrystal synthesis

Nanoscale ◽  
2017 ◽  
Vol 9 (40) ◽  
pp. 15635-15642 ◽  
Author(s):  
Xin Qi ◽  
Kristen A. Fichthorn
Keyword(s):  
Experimental Studies ◽  
Shape Selectivity ◽  
Solution Phase ◽  
Selective Synthesis ◽  
Metal Nanocrystals ◽  
Nanocrystal Synthesis ◽  
Shape Selective ◽  
Shape Controlled

Though many experimental studies have documented that certain solution-phase additives can play a key role in the shape-selective synthesis of metal nanocrystals, the origins and mechanisms of this shape selectivity are still unclear.

Size- and Shape-Selective Synthesis of Metal Nanocrystals and Nanowires Using CO as a Reducing Agent

2010 ◽  
Vol 122 (35) ◽  
pp. 6292-6295 ◽  
Author(s):  
Yijin Kang ◽  
Xingchen Ye ◽  
Christopher B. Murray
Keyword(s):  
Reducing Agent ◽  
Selective Synthesis ◽  
Size And Shape ◽  
Metal Nanocrystals ◽  
Shape Selective

Processing of Kinetic Boundaries in Macaque V4

2006 ◽  
Vol 95 (3) ◽  
pp. 1864-1880 ◽  
Author(s):  
Santosh G. Mysore ◽  
Rufin Vogels ◽  
Steve E. Raiguel ◽  
Guy A. Orban
Keyword(s):  
Relative Motion ◽  
Receptive Fields ◽  
Shape Selectivity ◽  
Luminance Contrast ◽  
Motion Cues ◽  
Form Processing ◽  
Similar Shape ◽  
Shape Selective ◽  
Sizeable Fraction ◽  
V4 Neurons

We used gratings and shapes defined by relative motion to study selectivity for static kinetic boundaries in macaque V4 neurons. Kinetic gratings were generated by random pixels moving in opposite directions in the neighboring bars, either parallel to the orientation of the boundary (parallel kinetic grating) or perpendicular to the boundary (orthogonal kinetic grating). Neurons were also tested with static, luminance defined gratings to establish cue invariance. In addition, we used eight shapes defined either by relative motion or by luminance contrast, as used previously to test cue invariance in the infero-temporal (IT) cortex. A sizeable fraction (10–20%) of the V4 neurons responded selectively to kinetic patterns. Most neurons selective for kinetic contours had receptive fields (RFs) within the central 10° of the visual field. Neurons selective for the orientation of kinetic gratings were defined as having similar orientation preferences for the two types of kinetic gratings, and the vast majority of these neurons also retained the same orientation preference for luminance defined gratings. Also, kinetic shape selective neurons had similar shape preferences when the shape was defined by relative motion or by luminance contrast, showing a cue-invariant form processing in V4. Although shape selectivity was weaker in V4 than what has been reported in the IT cortex, cue invariance was similar in the two areas, suggesting that invariance for luminance and motion cues of IT originates in V4. The neurons selective for kinetic patterns tended to be clustered within dorsal V4.

Selective synthesis of Ni3S4 nanocrystallites with hollow structures through a solution-phase approach

2006 ◽  
Vol 60 (29-30) ◽  
pp. 3631-3634 ◽  
Author(s):  
Changhua An ◽  
Zhongjie Zhang ◽  
Xiangying Chen ◽  
Yunqi Liu
Keyword(s):  
Solution Phase ◽  
Selective Synthesis ◽  
Phase Approach ◽  
Hollow Structures
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