S. Amelinckx

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The concept of a spatial-velocity hodograph is introduced to describe quantitatively the extrusion of a carbon tubule from a catalytic particle. The conditions under which a continuous tubular surface can be generated are discussed in terms of this hodograph, the shape of which determines the geometry of the initial nanotube. The model is consistent with(More)
) A#B 8 C !D A2B 4 E F G E : F > 8 < E ; D(! A(B H 6 G C $ $ < < 0 = 3 6 1!# A1B 8 C $ I 4 ? I E H : H 4 H 4 #D! A!B I J < = ; H 4 $ I (#* ADB I J G 4 < = 22D( A*B % $ C < $ ; ? 3 E 3 % H ? ! 21( A.B ? / $ = $ H 4 H ? C D*# A+B < = I J #("* A#"B I J I E " !++ A##B I J I E # " (+DD A#2B F 3 % G G E E ; G 6 G 0 = # #+1* A#(B $ $ = G 7 / G 0 $ ! " 2"! A#1B > 8(More)
A model that postulates a mixture of scroll-shaped and concentric, cylindrical graphene sheets is proposed to explain the microstructure of graphite multishell nanotubes grown by arc discharge. The model is consistent with the observed occurrence of a relatively small number of different chiral angles within the same tubule. The model explains clustering in(More)
Willki ir beha f t e t ; dahe r is t Ifir die P rax i s au f F a k t o r e n der Gr6Benordnung E ins kein i iberm~Biges Gewicht zu legen. Hier wurde z .B. bet e ther P u n k t q u e l l e als geomet r i sche Auf16sungsgrenze der Rad i u s des Kreises definiert , i nne rha lb dessen die H~lf te aller zur Oberf lgche h in emi t t i e r t en Tei lchen in die E(More)
Electron microscopic study of the reversible P1 to I1 phase transition in anorthite (transition temperature T(c) = 516 Kelvin) shows that the antiphase boundaries (APBs) with the displacement vector R = 1/2[111] become unstable at T(c), and numerous small APB loops are formed. These interfaces are highly mobile, and their vibration frequency increases(More)
D a s experimentum cruets s t e h t n o c h i m m e r aus , u n d w i r , ,Al t-Bakteriologen" w e r d e n m i t R u h e u n d G e l a s s e n h e i r d e r w e i t e r e n , , E n t w i c k l u n g " a u f d e m G e b i e t d e r R e g e n e r a t i o n o d e r T r a n s m u t a t i o n y o n Z e l l o r g a n e l l e n zu B a k t e r i e n e n t g e g e n(More)
Zur Entdeckungsgeschichte der infrarotempfindlichen Phosphore. Der im fibrigen vor t ref f l iche Ber ich t des He r rn STOCKMANN fiber Kr i s t a l l phosphore ~) zeigt wieder e inmal , dab fiber die E n t d e c k u n g der in f ra ro tempf ind l i chen , zweifach Se l tene-Erdak t iv ie r t en Phospho re irrige A n s c h a u u n g e n i m U m l a u f(More)
Crystals of Thymol , grown under sui table condi t ions from solut ions of CS~ or CC14 as well as from the mel t exhib i t growthspira ls . General ly no spirally te r raced growth hills, as p red ic t ed by theoryl ) , are formed. In s tead g rowth pi ts are c om m on ly observed. So far only one similar example e.g. salol 2) is known. As the crysta ls of(More)
p G e r m a n i u m ( I n d i u m oder A l u m i i l i u m als Akzeptorei l) wurde im I I l f raro ten u i l te rsucht I ) , u n d zwar m i t e i nem L E I s S D o p p e l m o n o c h r o m a t o r u n d e inem den V e r s u c h e n ang e p a g t e n PERt~IN-ELMER-Spektrometer Modell 12c. Je n a c h d e m gewi insch ten MeBbereich 1,5 bis 35 tz wurdei l(More)
fl ihrt . Die E rgebn i s se au s zwei u n a b h ~ n g i g e n B e s t i m m u n g s m e t h o d e n l iefern also seh r gu t e ~ b e r e i n s t i m m u n g . [Eine N e u a u s w e r t u n g sb) der M e s s u n g e n an 1 7583 in e) e rg ib t allerd ings aus d e m B F a k t o r des E u I T e r m e s z~O-P~x]e den W e r t QI~I = + (1,7-40,5) ba rn . Dieser(More)