Question 1: (A gold nanoholes arrangement) We are going to fabricate a gold nano

Question

Question 1: (A gold nanoholes arrangement) We are going to fabricate a gold nanoholes arrangement which includes a central hole surrounded by four identical holes. The diameter of holes (D) is 0.2nm and inter-hole gap (G) is 0.03nm. This structure can be created by ORION NanoFab, as shown in Fig.1(a), which is using focused gallium ion beam (FIB) for the rapid milling of materials down to feature sizes of less than 10nm. This instrument can read bmp file which can be created by a MATLAB code. Fig.1(a) The gold nanohole arrangement created by ORION NanoFab, (b) required bmp file which can be read by the instrument to fabricate the structure.

Explanation / Answer

%% units is in centimeters, because in nanometers it is not visible in figure.

% u can multiply A, D and T with 10^-9 to get it in nano meters

A=1; % side of rectangle
D=0.2;T=0.03; % Diameter of circle and distance between circles
X=5;Y=5; % position left corner of rectangle
X1=X+A/2-D/2;Y1=Y+A/2-D/2; % position left corner of center circle
X2=X1-D-T;Y2=Y1;
X3=X1+D+T;Y3=Y1;
X4=X1;Y4=Y1-D-T;
X5=X1;Y5=Y1+D+T;
%
figure;
S = annotation('rectangle');
S.Color = 'black';
S.FaceColor='black';
S.Units= 'centimeters';
S.Position=[X Y A A];
C1 = annotation('ellipse');
C1.Color = 'white';
C1.FaceColor='white';
C1.Units= 'centimeters';
C1.Position=[X1 Y1 D D];
%
C2 = annotation('ellipse');
C2.Color = 'white';
C2.FaceColor='white';
C2.Units= 'centimeters';
C2.Position=[X2 Y2 D D];
%
C3 = annotation('ellipse');
C3.Color = 'white';
C3.FaceColor='white';
C3.Units= 'centimeters';
C3.Position=[X3 Y3 D D];
%
C4 = annotation('ellipse');
C4.Color = 'white';
C4.FaceColor='white';
C4.Units= 'centimeters';
C4.Position=[X4 Y4 D D];
%
C5 = annotation('ellipse');
C5.Color = 'white';
C5.FaceColor='white';
C5.Units= 'centimeters';
C5.Position=[X5 Y5 D D];
%
print('BMPFILE','-dbmp')

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