The authors demonstrate the detection of magnetic particles carried by water in a continuous flow using an atomic magnetic gradiometer. Studies on three types of magnetic particles are presented: a single cobalt particle (diameter , multidomain), a suspension of superparamagnetic magnetite particles (diameter ), and ferromagnetic cobalt nanoparticles (diameter ). Estimated detection limits are diameter for a single cobalt particle at a water flow rate of , magnetite particles at , and for the ferromagnetic fluid of cobalt nanoparticles at . Possible applications of their method are discussed.
REFERENCES
1.
Q. A.
Pankhurst
, J.
Connolly
, S. K.
Jones
, and J.
Dobson
, J. Phys. D
36
, R167
(2003
).2.
J.-M.
Nam
, C. S.
Thaxton
, and C. A.
Mirkin
, Science
301
, 1884
(2003
).3.
J.
Connolly
, T. G.
St. Pierre
, M.
Rutnakornpituk
, and J. S.
Riffle
, J. Phys. D
37
, 2475
(2004
).4.
A. K.
Gupta
and M.
Gupta
, Biomaterials
26
, 3995
(2005
).5.
S.
Odenbach
, J. Phys.: Condens. Matter
15
, S1497
(2003
).6.
A.
Tsukamoto
, K.
Saitoh
, D.
Suzuki
, N.
Sugita
, Y.
Seki
, A.
Kandori
, K.
Tsukada
, Y.
Sugiura
, S.
Hamaoka
, H.
Kuma
, N.
Hamasaki
, and K.
Enpuku
, IEEE Trans. Appl. Supercond.
15
, 656
(2005
).7.
H.-J.
Krause
, G. I.
Panaitov
, N.
Wolters
, D.
Lomparski
, W.
Zander
, Y.
Zhang
, E.
Oberdoerffer
, D.
Wollersheim
, and W.
Wilke
, IEEE Trans. Appl. Supercond.
15
, 729
(2005
).8.
D. K.
Wood
, K. K.
Ni
, D. R.
Schmidt
, and A. N.
Cleland
, Sens. Actuators, A
120
, 1
(2005
).9.
N.
Pekas
, M. D.
Porter
, M.
Tondra
, A.
Popple
, and A.
Jander
, Appl. Phys. Lett.
85
, 4783
(2004
).10.
S. M.
Montemayor
, L. A.
García-Cerda
, and J. R.
Torres-Lubián
, Mater. Lett.
59
, 1056
(2005
).11.
P. C.
Fannin
, A.
Slawska-Waniewska
, P.
Didukh
, A. T.
Giannitsis
, and S. W.
Charles
, Eur. Phys. J.: Appl. Phys.
17
, 3
(2002
).12.
C.
Affolderbach
, M.
Stähler
, S.
Knappe
, and R.
Wynands
, Appl. Phys. B: Lasers Opt.
75
, 605
(2002
).13.
S. E.
Turvey
, E.
Swart
, M. C.
Denis
, U.
Mahmood
, C.
Benoist
, R.
Weissleder
, and D.
Mathis
, J. Clin. Invest.
115
, 2454
(2005
).14.
D.
Budker
, D. F.
Kimball
, S. M.
Rochester
, V. V.
Yashchuk
, and M.
Zolotorev
, Phys. Rev. A
62
, 043403
(2000
).15.
I. K.
Kominis
, T. W.
Kornack
, J. C.
Allred
, and M. V.
Romalis
, Nature (London)
422
, 596
(2003
).16.
D.
Budker
, D. F.
Kimball
, V. V.
Yashchuk
, and M.
Zolotorev
, Phys. Rev. A
65
, 055403
(2002
).17.
S.
Xu
, S. M.
Rochester
, V. V.
Yashchuk
, M. H.
Donaldson
, and D.
Budker
, Rev. Sci. Instrum.
77
, 083106
(2006
).18.
M. V.
Balabas
, D.
Budker
, J.
Kitching
, P. D. D.
Schwindt
, and J. E.
Stalnaker
, J. Opt. Soc. Am. B
23
, 1001
(2006
).© 2006 American Institute of Physics.
2006
American Institute of Physics
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